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C5 Error Codes and what they mean

Discussion in 'Corvette Tech Guides/DIY' started by BAD-C5, Mar 18, 2009.

  1. BAD-C5

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    Active Member

    Mar 10, 2009
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    2002 C5
    Here is a breakdown of what each digit of the code means:

    First Character - SystemThe first character identifies identifies the system related to the trouble code.

    P = Powertrain
    B = Body
    C = Chassis
    U = Undefined

    Second Digit - Code TypeThe second digit identifies whether the code is a generic code (same on all OBD-II equpped vehicles), or a manufacturer specific code.

    0 = Generic (this is the digit zero -- not the letter "O")
    1 = Enhanced (manufacturer specific)

    Third Digit - Sub-SystemThe third digit denotes the type of sub-system that pertains to the code

    1 = Emission Management (Fuel or Air)
    2 = Injector Circuit (Fuel or Air)
    3 = Ignition or Misfire
    4 = Emission Control
    5 = Vehicle Speed & Idle Control
    6 = Computer & Output Circuit
    7 = Transmission
    8 = Transmission
    9 = SAE Reserved
    0 = SAE Reserved

    Fourth and Fifth DigitsThese digits, along with the others, are variable, and relate to a particular problem. For example,a P0171 code means P0171 - System Too Lean (Bank 1). To lookup your particular code, visit our OBD Trouble Codes section.

    P0101 OBD-II Trouble Code
    Technical DescriptionMass Air Flow (MAF) Circuit Range/Performance Problem

    What does that mean?Basically this means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. The PCM detects that the actual MAF sensor frequency signal is not within a predetermined range of the calculated MAF value for more than 4.0 seconds.

    SymptomsYou will likely not notice any serious drivability problems, although there may be symptoms.

    Possible SolutionsThe simplest thing to do is to reset the code and see if it comes back. Then start with the cheapest, easiest repair procedures:

    Inspect for the following conditions:
    An incorrectly routed harness--Inspect the harness of the MAF sensor in order to verify that it is not routed too close to the following components:
    - The secondary ignition wires or coils
    - Any solenoids
    - Any relays
    - Any motors
    A low minimum air rate through the sensor bore may cause this DTC to set at idle or during deceleration. Inspect for any vacuum leaks downstream of the MAF sensor.
    A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor g/s display on the scan tool to increase rapidly. This increase should be from 6-12 g/s at idle to 230 g/s or more at the time of the 1-2 shift. If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.
    The barometric pressure (BARO) that is used in order to calculate the predicted MAF value is initially based on the MAP sensor at key ON.
    When the engine is running the MAP sensor value is continually updated near WOT. A skewed MAP sensor will cause the calculated MAF value to be inaccurate. The value shown for the MAP sensor display varies with the altitude. With the ignition ON and the engine OFF, 103 kPa is the approximate value near sea level. This value will decrease by approximately 3 kPa for every 305 meters (1,000 feet) of altitude.
    A high resistance on the ground circuit of the MAP sensor can cause this DTC to set.
    Any loss of vacuum to the MAP sensor can cause this DTC to set.
    If you suspect the condition may be related to aftermarket accessories, refer to Checking Aftermarket Accessories in Wiring Systems.
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  2. Riley P

    Riley P
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    Staff Member

    Jan 11, 2009
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    2000 Z51
    Cool! I like the break down of the codes. They don't mention anything about a blue MAF, do they?:rofl:
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  3. not2melo

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    High RPM Poster

    Feb 8, 2009
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    Greg in Toronto/Gtown
    1999 C5 Z51
    Here is a Corvette OB II Fault code list:

    Corvette Body Codes

    B0016, B0017, or B0018 Right Front/Passenger Frontal Deployment Loop (Stage 1) Circuit
    B0022, B0024, or B0026 Left Front/Driver Frontal Deployment Loop (Stage 1) Circuit
    B0051 Deployment Commanded
    B0053 Deployment Commanded with Loop Malfunctions Present
    B0090 Active Switch Voltage Out of Range
    B0091 Active Switch: Wrong State
    B0332 Outside Air Temp Sensor Short to Ground
    B0333 Outside Air Temperature Sensor Open
    B0337 Inside Air Temp Sensor Short to GND
    B0338 Inside Air Temperature Sensor Open
    B0348 Sunload Temperature Sensor Open
    B0361 Left Actuator Feedback Short to GND
    B0363 Left Actuator Feedback Open
    B0365 Right Actuator Feedback Short to GND
    B0367 Right Actuator Feedback Open
    B0432 Rear Defogger Relay Circuit
    B0433 Rear Defogger Relay Circuit
    B0441 Left Actuator Out of Range
    B0446 Right Actuator Out of Range
    B0502 RH DRL Relay Circuit
    B0503 RH DRL Relay Circuit
    B0507 LH DRL Relay Circuit
    B0508 LH DRL Relay Circuit
    B0516 Speedometer Signal Circuit Malfunction
    B0521 Tachometer Signal Circuit Malfunction
    B0605 BCM Internal Memory Malfunction
    B0846 Battery 2 Out of Range
    B0846 or B0851 Battery Out of Range
    B0851 Battery 1 Out of Range
    B0856 +5 Volt Reference Out of Range
    B1000 ECU Malfunction
    B1001 Option Configuration Error
    B1512-B1537 Driver Information Center (DIC) Switch Circuit
    B1542 Oil Temperature Circuit Short to Ground
    B1543 Oil Temperature Circuit Open
    B2172, B2177, B2182, B2187, B2192, or B2197 Power Seat Switch Circuit
    B2202-B2208 Window Switch Circuit
    B2222-B2224 Mirror Select Switch Circuit
    B2226-B2234 Mirror Switch Circuit
    B2236-B2239 Door Lock Switch Circuit
    B2242-B2244 Memory Switch Circuit
    B2252-B2253 Door Key Cylinder Circuit
    B2262-B2265 Mirror Position Sensor Signal Circuit
    B2272-B2273 Mirror Motor Control Circuit
    B2274-B2275 Window Motor Control Circuit
    B2276-B2277 Door Lock Control Circuit
    B2282 Battery #1 Circuit
    B2283 Battery #1 Circuit
    B2284 Battery #2 Circuit
    B2285 Battery #2 Circuit
    B2286-B2287 Mirror Position Sensor Circuit
    B2403 Front Fog Lamp Switch Circuit
    B2408 Rear Fog Lamp Switch Circuit
    B2482 Backup Lamp Relay Circuit
    B2483 Backup Lamp Relay Circuit
    B2527 Horn Relay Circuit
    B2528 Horn Relay Circuit
    B2567 Folding Top Release Switch Circuit
    B2573 Hatch Release Switch Circuit
    B2578 Right Front Turn Signal Monitor Circuit
    B2583 Left Front Turn Signal Monitor Circuit
    B2587 Column Lock/Unlock Drive A
    B2588 Column Lock/Unlock Drive A
    B2592 Column Lock/Unlock Drive B
    B2593 Column Lock/Unlock Drive B
    B2597 Traction Control System Switch Circuit
    B2600 Seat Motor to Battery Voltage
    B2605-B2607 Seat Position Sensor Circuit
    B2647 Ambient Light Sensor Circuit Low
    B2648 Ambient Light Sensor Circuit High
    B2721 PASS-Key Detection Circuit
    B2722 PASS-Key Detection Circuit
    B2723 PASS-Key Detection Circuit
    B2735 PASS-Key Programming Mode Active
    B2795 Suspension Control Select Switch Circuit Malfunction
    B2852 Telescoping Column In Switch Shorted to Ground
    B2857 Telescoping Column Out Switch Shorted to Ground
    B2860 Telescoping Column Position Sensor Failure
    B3109 Keyless Entry Transmitter Low Battery
    B3577 Suspension Control Select Switch Contact Malfunction

    Corvette Chassis Codes

    C0550 ECU Malfunction
    C0563 Calibration ROM Checksum Error
    C0615, C0620, C0625 or C0630 Suspension Position Sensor Circuit
    C0665 Chassis Pitch Signal Circuit
    C0690 Damper Control Relay Circuit Malfunction
    C0691 Damper Control Relay Circuit Range
    C0693 Damper Control Relay Circuit High
    C0695 Position Sensor Overcurrent (8 volt supply)
    C0710 Steering Position Signal Malfunction
    C0750, C0755, C0760, or C0765 Tire Pressure Sensor Circuit
    C1214 Solenoid Valve Relay Contact or Coil Circuit Open
    C1217 Pump Motor Relay Contact Circuit Open
    C1218 Pump Motor Circuit Shorted to Voltage or Motor Ground Open
    C1221-C1235 Wheel Speed Sensor Circuit
    C1236 Low System Supply Voltage
    C1237 High System Supply Voltage
    C1241 MAGNA STEER Circuit Malfunction
    C1242 or C1243 Pump Motor Circuit
    C1247 Brake Pressure Differential Switch Activated
    C1248 DRP Disabled
    C1254 Abnormal Shutdown Detected
    C1255 or C1256 ECU Malfunction
    C1261-C1274 EBCM Internal Solenoid Circuit
    C1276, P1644, or P1689 Delivered Torque Circuit
    C1277 or P1571 Powertrain Indicated Traction Control Malfunction
    C1278 TCS Temporarily Inhibited By PCM
    C1281, C1283, or C1286 VSES Sensors Uncorrected
    C1282 Yaw Rate Sensor Bias Circuit Malfunction
    C1284 or C1285 Lateral Accelerometer Circuit
    C1287 or C1288 Steering Position Sensor Circuit
    C1291 Open Brake Lamp Switch Contacts During Deceleration
    C1292, C1293, or C1296 Master Cylinder Pressure Sensor Circuit
    C1294 Brake Lamp Switch Circuit Always Active
    C1295 Brake Lamp Switch Circuit Open

    Corvette OBD2 Powertrain Codes

    P1111 Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage
    P1112 Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage
    P1114 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low
    P1115 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High
    P1120 Throttle Position (TP) Sensor 1 Circuit
    P1125 Accelerator Pedal Position (APP) System
    P1133 or P1153 HO2S Insufficient Switching
    P1134 or P1154 HO2S Transition Time Ratio
    P1220 Throttle Position (TP) Sensor 2 Circuit
    P1221 Throttle Position (TP) Sensor 1- 2 Correlation
    P1258 Engine Coolant Overtemperature - Protection Mode Active
    P1275 Accelerator Pedal Position (APP) Sensor 1 Circuit
    P1276 Accelerator Pedal Position (APP) Sensor 1 Performance
    P1280 Accelerator Pedal Position (APP) Sensor 2 Circuit
    P1281 Accelerator Pedal Position (APP) Sensor 2 Performance
    P1285 Accelerator Pedal Position (APP) Sensor 3 Circuit
    P1286 Accelerator Pedal Position (APP) Sensor 3 Performance
    P1336 Crankshaft Position (CKP) System Variation Not Learned
    P1380 Misfire Detected - Rough Road Data Not Available
    P1381 Misfire Detected - No Communication with Brake Control Module
    P1415 or P1416 Secondary Air Injection (AIR) System
    P1431 Fuel Level Sensor 2 Performance
    P1432 Fuel Level Sensor 2 Circuit Low Voltage
    P1433 Fuel Level Sensor 2 Circuit High Voltage
    P1441 Evaporative Emission (EVAP) System Flow During Non-Purge
    P1514 Throttle Body Performance
    P1515 Control Module Throttle Actuator Position Performance
    P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position
    P1517 Throttle Actuator Control (TAC) Module Performance
    P1518 Throttle Actuator Control (TAC) Module Serial Data Circuit
    P1539 Air Conditioning (A/C) Clutch Feedback Circuit High Voltage
    P1546 Air Conditioning (A/C) Clutch Feedback Circuit Low Voltage
    P1574 Stoplamp Switch Circuit
    P1575 Extended Travel Brake Switch Circuit
    P1626 Theft Deterrent Fuel Enable Signal Lost
    P1630 Theft Deterrent Learn Mode Active
    P1631 Theft Deterrent Start Enable Signal Not Correct
    P1635 5 Volt Reference 1 Circuit
    P1637 Generator L-Terminal Circuit
    P1638 Generator F-Terminal Circuit
    P1639 5 Volt Reference 2 Circuit
    P1652 Powertrain Induced Chassis Pitch Output Circuit
    P1810 TFP Valve Position Switch Circuit
    P1860 TCC PWM Solenoid Circuit Electrical
    P1870 Transmission Component Slipping

    Chevrolet Corvette Undefined Codes

    U1000 and U1255 Class 2 Communication Malfunction
    U1001-U1254 Lost Communication with XXX
    U1300, U1301, or U1305 Class 2 Data Link Shorted
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  4. ctdrl-1

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    Well-Known Member

    Jan 12, 2009
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    Saskatoon, Sask
    Man are those some good posts!! Thanks guys you never know when you will need that stuff, as great as these cars are some of the fun of ownership is dealing with the Gremlins when they appear!

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