c5 check engine light

[Robert P.]

the check engine light came on as i was driving. in the owners manual it refers to some sort of emissions issue, is there anything i can do myself to find the problem,as i have to wait for 2 weeks for my vette mechanic to return from vacation.

thanks

bob pierce ps the light is steady not blinking

[Edward J.]

Re: c5 check engine light

Bob, Sometimes the local discount auto stores will perform a free dia check for free, maybe auto zone.

[Clem Z.]

Re: c5 check engine light

the check engine light came on as i was driving. in the owners manual it refers to some sort of emissions issue, is there anything i can do myself to find the problem,as i have to wait for 2 weeks for my vette mechanic to return from vacation.

thanks

bob pierce ps the light is steady not blinking

make sure your gas cap it tight at least 3 to 4 clicks

[Michael H.]

Re: c5 check engine light

Here ya go Bob.

Whenever that pesky engine icon comes on the dash it is telling you that something is now or sometime in the past malfunctioned. It could be as simple as a turn signal bulb burned out, which IMO is TMI (Too Much Information). Regardless, you want/need to know what it's trying to tell you so that something minor doesn't become a big problem. The check engine icon will go away by itself after 40 or so ignition cycles or you can clear most of them yourself. If the icon is blinking at you, shut the car down, you have a serious problem and need to see the dealer.

The "diagnostic display" mode is entered with the following Procedure:

1) Turn on the ignition but don't start the engine.
2) Press the "reset" button to turn off any warning messages
3) Press and hold "options" and
4) While holding "options", press "fuel" four times within a 10-Second period.

Initially, the on-board diagnostics go into the "automatic" mode, which shows each module's DTCs in a
pre-set sequence: (Page No. are for the GM Service Manual)
10 PCM Power-train Control Module page 6-357 - 6-361
28 TCS Traction Control system ABS on page 5-86
?? RTD Real Time damping page 3-136
40 BCM Body Control Module page 8-405 LTD Page 8-727
60 [PC Instrument Panel Cluster page 8-508
80 radio page 8-213
99 FIVAC Heater Vent-Air Conditioning page 1-118
A0 LDCM Left Door Control module page 8-904 to 8-951
Al RDCM Right Door Control Module page 8-904 to 8-951
AC SCM Seat Control module page 8-1064-8-1082
B0 RFA Remote Function Actuation page 8-676

For each module, all DTCs will be displayed. If none are present in a module, you will see "no more codes" on the ICP display.
There are two kinds of DTCs, "Current" and "History," designated with a letter suffix, "C" or "H". A current code indicates that the malfunction is present in the system whose module is displaying data. A history code indicates a problem existed in that module sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it is possible it's evidence of a previous problem. Now solved, that was not removed by clearing codes. More likely is that a history code indicates an intermittent malfunction.

"Intermittent" are the most challenging DTCs. An intermittent may have happened only once, may have happened more than once but is inconsistent in its appearance or may be happening on a regular basis but not at the time the IPC is displaying codes. History codes can also be caused by a current malfunction in a system that is not Operating at the time DTCs are displayed. An example is the rear window defogger, which doesn't operate until the BCM detects engine rpm. For history codes set by a system that does not operate with the key on and engine off, a special diagnostic tool called a "scan tester is necessary to properly diagnose the malfunction.

Once the IPC has displayed all 11 modules, the system goes into the manual mode, which allows selection of each module, using combinations of DIC buttons. The manual mode can also be entered at any time during the automatic sequence by pressing any button except "E/M". Once the IPC displays "manual diagnostics", you may select a particular module by pressing the options button to go forward or the "trip" button to go back. Once a system is selected and a DTC is displayed, if more than one are present; press "gages" To move forward or "fuel" to go back. To exit the diagnostic mode at any time, press E/M". If you want to erase or "clear" codes, press "reset". Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory.

I'll post codes in subsequent posts as there is a limit to how many characters are allowed.

[Michael H.]

Re: c5 check engine light

Well, I got side tracked with work, here's what the codes mean:

DTC 1016 Loss Of PCM Communications
DTC 1064 Loss Of BCM Serial Data Communication
DTC 1096 Loss Of IPC Communications
DTC 1255 Generic Loss Of Communications
DTC B0332 Outside Air Temp Sensor Short to Ground
DTC B0333 Outside Air Temperature Sensor Open
DTC B0337 Inside Air Temp Sensor Short to GND
DTC B0338 Inside Air Temperature Sensor Open
DTC B0348 Sunload Temperature Sensor Open
DTC B0361 Left Actuator Feedback Short to GND
DTC B0363 Left Actuator Feedback Open
DTC B0365 Right Actuator Feedback Short to GND
DTC B0367 Right Actuator Feedback Open
DTC B0432 Rear Defogger Relay Circuit
DTC B0433 Rear Defogger Relay Circuit
DTC B0441 Left Actuator Out of Range
DTC B0446 Right Actuator Out of Range
DTC B0502 RH DRL Relay Circuit
DTC B0503 RH DRL Relay Circuit
DTC B0507 LH DRL Relay Circuit
DTC B0508 LH DRL Relay Circuit
DTC B0516 Speedometer Signal Circuit Malfunction
DTC B0521 Tachometer Signal Circuit Malfunction
DTC B0605 BCM Internal Memory Malfunction
DTC B0605 Receiver Internal Memory Malfunction
DTC B0846 Battery 2 Out of Range
DTC B0851 Battery 1 Out of Range
DTC B0856 +5 Volt Reference Out of Range
DTC B1015 Passenger Deploy. Loop Resistance High
DTC B1016 Passenger Deployment Loop Resistance Low
DTC B1017 Passenger Deployment Loop Open
DTC B1018 Passenger Deployment Loop Short to GND
DTC B1019 Passenger Deploy. Loop Short to Voltage
DTC B1021 Driver Deployment Loop Resistance High
DTC B1022 Driver Deployment Loop Resistance Low
DTC B1024 Driver Deployment Loop Short to Ground
DTC B1025 Driver Deployment Loop Short to Voltage
DTC B1026 Driver Deployment Loop Open
DTC B1035 Discr. Sensor Closed or Short to GND
DTC B1036 Discr. Sensor Open or Short to Voltage
DTC B1051 Deployment Commanded
DTC B1053 Deployment Commanded w/Loop Malfunction
DTC B1061 Lamp Circuit Failure
DTC B1071 Internal SDM Failure
DTC B1512 DIC Switch 1 Signal Short to Ground
DTC B1517 DIC Switch 2 Signal Short to Ground
DTC B1522 DIC Switch 3 Signal Short to Ground
DTC B1527 DIC Switch 4 Signal Short to Ground
DTC B1532 DIC Switch 5 Signal Short to Ground
DTC B1537 DIC Switch 6 Signal Short to Ground
DTC B1542 Oil Temperature Circuit Short to Ground
DTC B1543 Oil Temperature Circuit Open
DTC B2002 Fore/Aft Seat Motor Open or Short to GND
DTC B2007 Front Vert. Seat Motor Open or Shorted
DTC B2012 Rear Vert. Seat Motor Open or Shorted
DTC B2172 Seat Front Up Switch Shorted to Ground
DTC B2177 Seat Front Down Switch Shorted to Ground
DTC B2182 Seat Rear Up Switch Shorted to Ground
DTC B2187 Seat Rear Down Switch Shorted to Ground
DTC B2192 Seat Forward Switch Shorted to Ground
DTC B2197 Seat Reverse Switch Shorted to Ground
DTC B2202 Left Window Up Switch Circuit
DTC B2203 Right Window Up Switch Circuit
DTC B2204 Left Window Down Switch Circuit
DTC B2205 Right Window Down Switch Circuit
DTC B2206 Right Window Up Switch Circuit
DTC B2208 Right Window Down Switch Circuit
DTC B2222 LT Mirror Select Switch Circuit
DTC B2224 RT Mirror Select Switch Circuit
DTC B2226 Mirror Right Switch Circuit
DTC B2228 Mirror Left Switch Circuit
DTC B2232 Mirror Up Switch Circuit
DTC B2234 Mirror Down Switch Circuit
DTC B2236 Left Door Lock Switch Circuit
DTC B2237 Right Door Lock Switch Circuit
DTC B2238 Left Door Unlock Switch Circuit
DTC B2239 Right Door Unlock Switch Circuit
DTC B2242 Memory 1 Switch Circuit
DTC B2244 Memory 2 Switch Circuit
DTC B2252 Key Cylinder Switch Circuit
DTC B2253 Key Cylinder Switch Circuit
DTC B2262 Horizontal Position Sensor Circuit
DTC B2263 Horizontal Position Sensor Circuit
DTC B2264 Vertical Position Sensor Circuit
DTC B2265 Vertical Position Sensor Circuit
DTC B2272 Left Mirror Motor Circuit
DTC B2273 Right Mirror Motor Circuit
DTC B2274 Window Motor Circuit
DTC B2275 Window Motor Circuit
DTC B2276 Door Lock Motor/Mirror Heater Circuit
DTC B2277 Door Lock Motor/Mirror Heater Circuit
DTC B2278 Switch Indicator/Illum Circuit
DTC B2279 Switch Illumination Circuit
DTC B2282 Battery #1 Circuit
DTC B2283 Battery #1 Circuit
DTC B2284 Battery #2 Circuit
DTC B2285 Battery #2 Circuit
DTC B2286 LH Mirror Supply Circuit
DTC B2287 RH Mirror Supply Circuit
DTC B2403 Front Fog Lamp Switch Circuit
DTC B2408 Rear Fog Lamp Switch Circuit
DTC B2482 Backup Lamp Relay Circuit
DTC B2483 Backup Lamp Relay Circuit
DTC B2527 Horn Relay Circuit
DTC B2528 Horn Relay Circuit
DTC B2573 Hatch Release Switch Circuit
DTC B2578 Right Front Turn Signal Monitor Circuit
DTC B2583 Left Front Turn Signal Monitor Circuit
DTC B2587 Column Lock/Unlock Drive A
DTC B2588 Column Lock/Unlock Drive A
DTC B2592 Column Lock/Unlock Drive B
DTC B2593 Column Lock/Unlock Drive B
DTC B2597 Traction Control System Switch Circuit
DTC B2600 Seat Motor to Battery Voltage
DTC B2605 Seat Front Vert. Position Sensor Failure
DTC B2606 Seat Rear Vert. Position Sensor Failure
DTC B2607 Seat Horizontal Position Sensor Failure
DTC B2721 PASS-Key Detection Circuit
DTC B2722 PASS-Key Detection Circuit
DTC B2723 PASS-Key Detection Circuit
DTC B2735 PASS-Key Programming Mode Active
DTC B2805 No Transmitters Programmed
DTC C1214 Solenoid Valve Relay Contact or Coil Circuit Open
DTC C1217 Pump Motor Relay Contact Circuit Open
DTC C1221 LF Wheel Speed Sensor Input Signal is 0
DTC C1222 RF Wheel Speed Sensor Input Signal is 0
DTC C1223 LR Wheel Speed Sensor Input Signal is 0
DTC C1224 RR Wheel Speed Sensor Input Signal is 0
DTC C1225 LF Excessive Wheel Speed Variation
DTC C1226 RF Excessive Wheel Speed Variation
DTC C1227 LR Excessive Wheel Speed Variation
DTC C1228 RR Excessive Wheel Speed Variation
DTC C1232 LF Wheel Speed Circuit Open or Shorted
DTC C1233 RF Wheel Speed Circuit Open or Shorted
DTC C1234 LR Wheel Speed Circuit Open or Shorted
DTC C1235 RR Wheel Speed Circuit Open or Shorted
DTC C1236 Low System Supply Voltage
DTC C1237 High System Supply Voltage
DTC C1241 MAGNA STEER Circuit Malfunction
DTC C1241 Magnasteer Malfunction
DTC C1242 BPMV Pump Motor Ground Circuit Open
DTC C1243 BPMV Pump Motor Stalled
DTC C1245 Brake Sensor Pressure Always High
DTC C1247 Brake Pressure Differential Switch Activated
DTC C1248 IPC Indicated Low Brake Fluid
DTC C1255 EBTCM Internal Malfunction
DTC C1256 EBCM Internal Malfunction
DTC C1261 LF Inlet Valve Solenoid Malfunction
DTC C1262 LF Outlet Valve Solenoid Malfunction
DTC C1263 RF Inlet Valve Solenoid Malfunction
DTC C1264 RF Outlet Valve Solenoid Malfunction
DTC C1265 LR Inlet Valve Solenoid Malfunction
DTC C1266 LR Outlet Valve Solenoid Malfunction
DTC C1267 RR Inlet Valve Solenoid Malfunction
DTC C1268 RR Outlet Valve Solenoid Malfunction
DTC C1271 Front Master Cyl Isolation Valve Malf
DTC C1272 Front Prime Valve Malfunction
DTC C1273 Rear Master Cyl Isolation Valve Malf
DTC C1274 Rear Prime Valve Malfunction
DTC C1276 Delivered Torque Signal Circuit Malfunction
DTC C1277 Requested Torque Signal Circuit Malfunction
DTC C1278 TCS Temporarily Inhibited By PCM
DTC C1281 Active Handling Sensors Uncorrelated
DTC C1281 Steering Sensor Uncorrelated Malfunction
DTC C1282 Yaw Rate Sensor Bias Circuit Malfunction
DTC C1283 Excessive Time to Center Steering
DTC C1284 Lateral Accelerometer Sensor Self Test Malfunction
DTC C1285 Lateral Accelerometer Sensor Circuit Malfunction
DTC C1286 Steering Sensor Bias Malfunction
DTC C1286 Steering/Lateral Accelerometer Sensor Bias Malfunction
DTC C1287 Steering Sensor Rate Malfunction
DTC C1288 Steering Sensor Circuit Malfunction
DTC C1291 Open Brake Lamp Switch Contacts During Deceleration
DTC C1292 Low Brake Pressure During Deceleration
DTC C1293 DTC C1291/C1292 Set in Current or Previous Ignition Cycle
DTC C1294 Brake Lamp Switch Circuit Always Active
DTC C1295 Brake Lamp Switch Circuit Open
DTC C1296 Brake Pressure Sensor CKT Open/Shorted
DTC C1650 ESC Module Malfunction
DTC C1658 EEPROM Calibration Malfunction
DTC C1710 LF Shock Absorber Solenoid Circuit
DTC C1711 LF Shock Absorber Solenoid Circuit
DTC C1712 LF Shock Absorber Solenoid Circuit
DTC C1715 RF Shock Absorber Solenoid Circuit
DTC C1716 RF Shock Absorber Solenoid Circuit
DTC C1717 RF Shock Absorber Solenoid Circuit
DTC C1720 LR Shock Absorber Solenoid Circuit
DTC C1721 LR Shock Absorber Solenoid Circuit
DTC C1722 LR Shock Absorber Solenoid Circuit
DTC C1725 RR Shock Absorber Solenoid Circuit
DTC C1726 RR Shock Absorber Solenoid Circuit
DTC C1727 RR Shock Absorber Solenoid Circuit
DTC C1743 Loss of Vehicle Speed Signal
DTC C1744 Loss of Chassis Pitch Input
DTC C1760 LF Position Sensor
DTC C1761 RF Position Sensor
DTC C1762 LR Position Sensor
DTC C1763 RR Position Sensor
DTC C1768 Position Sensor Supply Malfunction
DTC C1780 Loss of Steering Position Signal
DTC C1786 RTD Relay Malfunction
DTC C1787 RTD Relay Circuit
DTC C1788 RTD Relay Circuit
DTC C1790 Ride Control Switch
DTC C1791 Ride Control Switch
DTC C2100 Left Front TPM Sensor Malfunction
DTC C2105 Right Front TPM Sensor Malfunction
DTC C2110 Right Rear TPM Sensor Malfunction
DTC C2115 Left Rear TPM Sensor Malfunction
DTC C2120 TPM System Malfunction
DTC C2121 TPM System Programming Malfunction
DTC P0101 Mass Air Flow (MAF) Sensor Performance
DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency
DTC P0103 Mass Air Flow (MAF) Sensor Circuit High Frequency
DTC P0107 Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
DTC P0108 Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
DTC P0112 Intake Air Temperature (IAT) Sensor Circuit Low Voltage
DTC P0113 Intake Air Temperature (IAT) Sensor Circuit High Voltage
DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
DTC P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control
DTC P0131 HO2S Circuit Low Voltage Bank 1 Sensor 1
DTC P0132 HO2S Circuit High Voltage Bank 1 Sensor 1
DTC P0133 HO2S Slow Response Bank 1 Sensor 1
DTC P0134 HO2S Circuit Insufficient Activity Bank 1 Sensor 1
DTC P0135 HO2S Heater Performance Bank 1 Sensor 1
DTC P0137 HO2S Circuit Low Voltage Bank 1 Sensor 2
DTC P0138 HO2S Circuit High Voltage Bank 1 Sensor 2
DTC P0140 HO2S Circuit Insufficient Activity Bank 1 Sensor 2
DTC P0141 HO2S Heater Performance Bank 1 Sensor 2
DTC P0151 HO2S Circuit Low Voltage Bank 2 Sensor 1
DTC P0152 HO2S Circuit High Voltage Bank 2 Sensor 1
DTC P0153 HO2S Slow Response Bank 2 Sensor 1
DTC P0154 HO2S Circuit Insufficient Activity Bank 2 Sensor 1
DTC P0155 HO2S Heater Performance Bank 2 Sensor 1
DTC P0157 HO2S Circuit Low Voltage Bank 2 Sensor 2
DTC P0158 HO2S Circuit High Voltage Bank 2 Sensor 2

[Michael H.]

Re: c5 check engine light

DTC P0160 HO2S Circuit Insufficient Activity Bank 2 Sensor 2
DTC P0161 HO2S Heater Performance Bank 2 Sensor 2
DTC P0171 Fuel Trim System Lean Bank 1
DTC P0172 Fuel Trim System Rich Bank 1
DTC P0174 Fuel Trim System Lean Bank 2
DTC P0175 Fuel Trim System Rich Bank 2
DTC P0218 Transmission Fluid Overtemperature
DTC P0230 Fuel Pump Relay Control Circuit
DTC P0300 Engine Misfire Detected
DTC P0325 Knock Sensor Module Performance
DTC P0327 Knock Sensor (KS) 1 Circuit
DTC P0332 Knock Sensor (KS) 2 Circuit
DTC P0335 Crankshaft Position (CKP) Sensor Circuit
DTC P0336 Crankshaft Position (CKP) Sensor Performance
DTC P0341 Camshaft Position (CMP) Sensor Performance
DTC P0342 Camshaft Position (CMP) Sensor Circuit Low Voltage
DTC P0343 Camshaft Position (CMP) Sensor Circuit High Voltage
DTC P0351 Ignition Coil 1 Control Circuit
DTC P0352 Ignition Coil 2 Control Circuit
DTC P0353 Ignition Coil 3 Control Circuit
DTC P0354 Ignition Coil 4 Control Circuit
DTC P0355 Ignition Coil 5 Control Circuit
DTC P0356 Ignition Coil 6 Control Circuit
DTC P0357 Ignition Coil 7 Control Circuit
DTC P0358 Ignition Coil 8 Control Circuit
DTC P0410 Secondary Air Injection (AIR) System
DTC P0412 Secondary Air Injection (AIR) Solenoid Relay Control Circuit
DTC P0418 Secondary Air Injection (AIR) Pump Relay Control Circuit
DTC P0420 Catalyst System Low Efficiency Bank 1
DTC P0430 Catalyst System Low Efficiency Bank 2
DTC P0441 Evaporative Emission (EVAP) System No Flow During Purge
DTC P0443 Evaporative Emission (EVAP) Purge Solenoid Control Circuit
DTC P0461 Fuel Level Sensor Performance
DTC P0462 Fuel Level Sensor Circuit Low Voltage
DTC P0463 Fuel Level Sensor Circuit High Voltage
DTC P0480 Cooling Fan Relay 1 Control Circuit
DTC P0481 Cooling Fan Relay 2 and 3 Control Circuit
DTC P0500 Vehicle Speed Sensor (VSS) Circuit
DTC P0502 Vehicle Speed Sensor (VSS) Circuit Low Input
DTC P0503 Vehicle Speed Sensor (VSS) Circuit Intermittent
DTC P0506 Idle Speed Low
DTC P0507 Idle Speed High
DTC P0522 Engine Oil Pressure (EOP) Sensor Circuit Low Voltage
DTC P0523 Engine Oil Pressure (EOP) Sensor Circuit High Voltage
DTC P0530 Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit
DTC P0562 System Voltage Low
DTC P0563 System Voltage High
DTC P0567 Cruise Control Resume Switch Circuit
DTC P0568 Cruise Control Set Switch Circuit
DTC P0571 Cruise Control Brake Switch Circuit
DTC P0601Control Module Read Only Memory (ROM)
DTC P0602 Control Module Not Programmed
DTC P0604 Control Module Random Access Memory (RAM)
DTC P0606 Control Module Internal Performance
DTC P0608 Vehicle Speed Output Circuit
DTC P0650 Malfunction Indicator Lamp (MIL) Control Circuit
DTC P0654 Engine Speed Output Circuit
DTC P0704 Clutch Switch Circuit
DTC P0705 Trans Range Switch Circuit
DTC P0706 Trans Range Switch Performance
DTC P0711 TFT Sensor Circuit Range/Performance
DTC P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low Input
DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input
DTC P0719 Brake Switch Circuit Low Input
DTC P0724 Brake Switch Circuit High Input
DTC P0740 TCC Enable Solenoid Circuit Electrical
DTC P0742 TCC System Stuck On
DTC P0748 Pressure Control Solenoid Circuit Electrical
DTC P0751 1-2 Shift Solenoid Valve Performance
DTC P0753 1-2 Shift Solenoid Circuit Electrical
DTC P0756 2-3 Shift Solenoid Valve Performance
DTC P0758 2-3 Shift Solenoid Circuit Electrical
DTC P0785 3-2 Shift Solenoid Circuit Electrical
DTC P0801 Reverse Inhibit Solenoid Control Circuit
DTC P0803 Skip Shift Solenoid Control Circuit
DTC P0804 Skip Shift Lamp Control Circuit
DTC P1111 Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage
DTC P1112 Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage
DTC P1114 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage
DTC P1115 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage
DTC P1120 Throttle Position (TP) Sensor 1 Circuit
DTC P1125 Accelerator Pedal Position (APP) System
DTC P1133 HO2S Insufficient Switching Bank 1 Sensor 1
DTC P1134 HO2S Transition Time Ratio Bank 1 Sensor 1
DTC P1153 HO2S Insufficient Switching Bank 2 Sensor 1
DTC P1154 HO2S Transition Time Ratio Bank 2 Sensor 1
DTC P1220 Throttle Position (TP) Sensor 2 Circuit
DTC P1221 Throttle Position (TP) Sensor 1- 2 Correlation
DTC P1258 Engine Coolant Overtemperature - Protection Mode Active
DTC P1275 Accelerator Pedal Position (APP) Sensor 1 Circuit
DTC P1276 Accelerator Pedal Position (APP) Sensor 1 Performance
DTC P1280 Accelerator Pedal Position (APP) Sensor 2 Circuit
DTC P1281 Accelerator Pedal Position (APP) Sensor 2 Performance
DTC P1285 Accelerator Pedal Position (APP) Sensor 3 Circuit
DTC P1286 Accelerator Pedal Position (APP) Sensor 3 Performance
DTC P1380 Misfire Detected - Rough Road Data Not Available
DTC P1381 Misfire Detected - No Communication with Brake Control Module
DTC P1415 Secondary Air Injection (AIR) System Bank 1
DTC P1416 Secondary Air Injection (AIR) System Bank 2
DTC P1431 Fuel Level Sensor 2 Performance
DTC P1432 Fuel Level Sensor 2 Circuit Low Voltage
DTC P1433 Fuel Level Sensor 2 Circuit High Voltage
DTC P1441 Evaporative Emission (EVAP) System Flow During Non-Purge
DTC P1514 Throttle Body Performance
DTC P1515 Control Module Throttle Actuator Position Performance
DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
DTC P1517 Throttle Actuator Control (TAC) Module Performance
DTC P1518 Throttle Actuator Control (TAC) Module Serial Data Circuit
DTC P1539 Air Conditioning (A/C) Clutch Feedback Circuit High Voltage
DTC P1545 Air Conditioning (A/C) Clutch Relay Control Circuit
DTC P1546 Air Conditioning (A/C) Clutch Feedback Circuit Low Voltage
DTC P1571 Traction Control Torque Request Circuit
DTC P1574 Stoplamp Switch Circuit
DTC P1575 Extended Travel Brake Switch Circuit
DTC P1626 Theft Deterrent Fuel Enable Signal Lost
DTC P1630 Theft Deterrent Learn Mode Active
DTC P1631 Theft Deterrent Start Enable Signal Not Correct
DTC P1635 5 Volt Reference 1 Circuit
DTC P1639 5 Volt Reference 2 Circuit
DTC P1644 Traction Control Delivered Torque Output Circuit
DTC P1652 Powertrain Induced Chassis Pitch Output Circuit
DTC P1810 TFP Valve Position Switch Circuit
DTC P1860 TCC PWM Solenoid Circuit Electrical
DTC P1870 Transmission Component Slipping
DTC Table
DTC U1000 Class 2 Communication Malfunction
DTC U1016 Loss of Communications with PCM
DTC U1040 Loss of Communications with TCS
DTC U1056 Loss of Communications with RTD
DTC U1064 Lost Communications with BCM
DTC U1096 Loss of Communications with IPC
DTC U1128 Loss of Communications with RADIO
DTC U1153 Loss of Communications with HVAC
DTC U1160 Loss of Communications with LDCM
DTC U1161 Loss of Communications with RDCM
DTC U1166 Loss of Communications with SCM
DTC U1176 Loss of Communications with RFA
DTC U1255 Generic Loss of Communications
DTC U1255 Loss Of Class 2 Communication
DTC U1255 Serial Data Line Malfunction
DTC U1300 Class 2 Short to Ground
DTC U1301 Class 2 Circuit Short to Battery

[Clem Z.]

Re: c5 check engine light

the C-5 owners are lucky as you can not do this on the C-6 as GM wants to take it to the dealer for a $80 charge to read the code.

[Michael H.]

Re: c5 check engine light

Motorman, you got that right. Recently my dash lit up on my '09, took most of the afternoon off from work to have it scanned. Loose gas cap. Collasal waste of time and drove 50 miles one way to the dealer because all the others were forced closed. GM really missed it on both those calls.

[Terry M.]

Re: c5 check engine light

Motorman, you got that right. Recently my dash lit up on my '09, took most of the afternoon off from work to have it scanned. Loose gas cap. Collasal waste of time and drove 50 miles one way to the dealer because all the others were forced closed. GM really missed it on both those calls.

Mike, My C6 tells me "check the gas cap -- Dummy" Maybe I have a smart a$$ car. If so it is right at home.

[Tom H.]

Re: c5 check engine light

I would also first check gas cap. As you can see by the list, it could be one of a million things, but the gas cap is often the culpret !