LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hummer >> 2010 >> H3T Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.7L - Diagnostic Code Index >> Diagnostic Code Index
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

DTC Description
DTC P0013 P0013: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit
DTC P0014 P0014: Exhaust Camshaft Position (CMP) System Performance
DTC P0017 P0017: Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation
DTC P0030, P0036, P0053, P0054, P0135, or P0141 P0030: HO2S Heater Control Circuit Sensor 1
P0036: HO2S Heater Control Circuit Sensor 2
P0053: HO2S Heater Resistance Sensor 1
P0054: HO2S Heater Resistance Sensor 2
P0135: HO2S Heater Performance Sensor 1
P0141: HO2S Heater Performance Sensor 2
DTC P0068 or P0121 P0068: Throttle Body Airflow Performance
P0121: Throttle Position (TP) Sensor 1 Performance
DTC P0101 or P1101 P0101: Mass Air Flow (MAF) Sensor Performance
P1101: Intake Air Flow System Performance
DTC P0102 or P0103 P0102: Mass Air Flow (MAF) Sensor Circuit Low Frequency
P0103: Mass Air Flow (MAF) Sensor Circuit High Frequency
DTC P0106 P0106: Manifold Absolute Pressure (MAP) Sensor Performance
DTC P0107 or P0108 P0107: Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
P0108: Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
DTC P0112 or P0113 P0112: Intake Air Temperature (IAT) Sensor Circuit Low Voltage
P0113: Intake Air Temperature (IAT) Sensor Circuit High Voltage
DTC P0116 P0116: Engine Coolant Temperature (ECT) Sensor Performance
DTC P0117 or P0118 P0117: Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
P0118: Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
DTC P0120, P0122, P0123, P0220, P0222, P0223, or P2135 P0120: Throttle Position (TP) Sensor 1 Circuit
P0122: Throttle Position (TP) Sensor 1 Circuit Low Voltage
P0123: Throttle Position (TP) Sensor 1 Circuit High Voltage
P0220: Throttle Position (TP) Sensor 2 Circuit
P0222: Throttle Position (TP) Sensor 2 Circuit Low Voltage
P0223: Throttle Position (TP) Sensor 2 Circuit High Voltage
P2135: Throttle Position (TP) Sensor 1-2 Correlation
DTC P0128 P0128: Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature
DTC P0131, P0132, P0137, or P0138 P0131: HO2S Circuit Low Voltage Sensor 1
P0132: HO2S Circuit High Voltage Sensor 1
P0137: HO2S Circuit Low Voltage Sensor 2
P0138: HO2S Circuit High Voltage Sensor 2
DTC P0133, P0134, P013A, P013B, P013E, P013F, P0140, P1133, P2270, P2271, or P2A00 P0133: HO2S Slow Response Sensor 1
P0134: HO2S Circuit Insufficient Activity Sensor 1
P013A: HO2S Slow Response Rich to Lean Sensor 2
P013B: HO2S Slow Response Lean to Rich Sensor 2
P013E: HO2S Delayed Response Rich to Lean Sensor 2
P013F: HO2S Delayed Response Lean to Rich Sensor 2
P0140: HO2S Circuit Insufficient Activity Sensor 2
P1133: HO2S Insufficient Switching Sensor 1
P2270: HO2S Signal Stuck Lean Sensor 2
P2271: HO2S Signal Stuck Rich Sensor 2
P2A00: HO2S Circuit Closed Loop (CL) Performance Sensor 1
DTC P0171 or P0172 P0171: Fuel Trim System Lean
P0172: Fuel Trim System Rich
DTC P018B-P018D P018B: Fuel Pressure Sensor Performance
P018C: Fuel Pressure Sensor Circuit Low Voltage
P018D: Fuel Pressure Sensor Circuit High Voltage
DTC P0201, P0202, P0203, P0204, or P0205 P0201: Injector 1 Control Circuit
P0202: Injector 2 Control Circuit
P0203: Injector 3 Control Circuit
P0204: Injector 4 Control Circuit
P0205: Injector 5 Control Circuit
DTC P0230 P0230: Fuel Pump Control Output Circuit
DTC P0231, P0232, or P023F P0231: Fuel Pump Control Circuit Low Voltage
P0232: Fuel Pump Control Circuit High Voltage
P023F: Fuel Pump Control Circuit
DTC P025A P025A: Fuel Pump Control Module Enable Circuit
DTC P0300-P0305 P0300: Engine Misfire Detected
P0301: Cylinder 1 Misfire Detected
P0302: Cylinder 2 Misfire Detected
P0303: Cylinder 3 Misfire Detected
P0304: Cylinder 4 Misfire Detected
P0305: Cylinder 5 Misfire Detected
DTC P0315 P0315: Crankshaft Position (CKP) System Variation Not Learned
DTC P0324, P0325, P0326, P0327, or P0328 P0324: Knock Sensor (KS) Module Performance
P0325: Knock Sensor (KS) Circuit
P0326: Knock Sensor (KS) Performance
P0327: Knock Sensor (KS) Circuit Low Voltage
P0328: Knock Sensor (KS) Circuit High Voltage
DTC P0335 or P0336 P0335: Crankshaft Position Sensor Circuit
P0336: Crankshaft Position Sensor Performance
DTC P0351-P0355 P0351: Ignition Coil 1 Control Circuit
P0352: Ignition Coil 2 Control Circuit
P0353: Ignition Coil 3 Control Circuit
P0354: Ignition Coil 4 Control Circuit
P0355: Ignition Coil 5 Control Circuit
DTC P0365 P0365: Exhaust Camshaft Position Sensor Circuit
DTC P0366 P0366: Exhaust Camshaft Position Sensor Performance
DTC P0411 P0411: Secondary Air Injection (AIR) System Incorrect Air Flow Detected
DTC P0412 or P0418 P0412: Secondary Air Injection (AIR) Solenoid Control Circuit
P0418: Secondary Air Injection (AIR) Pump Control Circuit
DTC P0420 P0420: Catalyst System Low Efficiency
DTC P0442 P0442: Evaporative Emissions (EVAP) System Small Leak Detected
DTC P0443 or P0449 P0443: Evaporative Emission (EVAP) Purge Solenoid Control Circuit
P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit
DTC P0446 P0446: Evaporative Emission (EVAP) Vent System Performance
DTC P0451-P0454 P0451: Fuel Tank Pressure (FTP) Sensor Performance
P0452: Fuel Tank Pressure (FTP) Sensor Circuit Low Voltage
P0453: Fuel Tank Pressure (FTP) Sensor Circuit High Voltage
P0454: Fuel Tank Pressure (FTP) Sensor Intermittent
DTC P0455 P0455: Evaporative Emission (EVAP) System Large Leak
DTC P0496 P0496: Evaporative Emission (EVAP) System Flow During Non-Purge
DTC P0506 or P0507 P0506: Idle Speed Low
P0507: Idle Speed High
DTC P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F, or P2610 (ECM) P0601: Control Module Read Only Memory Performance
P0602: Control Module Not Programmed
P0603: Control Module Long Term Memory Reset
P0604: Control Module Random Access Memory Performance
P0606: Control Module Processor Performance
P0607: Control Module Performance
P060D: Control Module Accelerator Pedal (APP) Position System Circuitry Performance
P062F: Control Module Long Term Memory Performance
P2610: Control Module Ignition Off Timer Performance
DTC P0601-P0604, P0606, or P062F P0601: Control Module Read Only Memory (ROM)
P0602: Control Module Not Programmed
P0603: Control Module Long Term Memory Reset
P0604: Control Module Random Access Memory (RAM)
P0606: Control Module Internal Performance
P062F: Control Module Long Term Memory Performance
DTC P0641 or P0651 (ECM) P0641: 5 V Reference 1 Circuit
P0651: 5 V Reference 2 Circuit
DTC P0641 or P06A6 P0641: 5 V Reference Circuit
P06A6: 5 V Reference Performance
DTC P0650 P0650: Malfunction Indicator Lamp (MIL) Control Circuit
DTC P0685 or P0690 P0685: Engine Controls Ignition Relay Control Circuit
P0690: Engine Controls Ignition Relay Feedback Circuit High Voltage
DTC P069E P069E: Fuel Pump Control Module Requested MIL Illumination
DTC P0700 P0700: Transmission Control Module (TCM) Requested MIL Illumination
DTC P1174 P1174: Fuel Trim Cylinder Balance
DTC P1255 or P064A P064A: Fuel Pump Control Module Performance
P1255: Fuel Pump Control Module Driver Over-temperature
DTC P1381 P1381: Misfire Detected - No Communication With Brake Control Module
DTC P1400 P1400: Cold Start Emission Reduction Control System
DTC P1516, P2101, P2119, or P2176 P1516: Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
P2101: Throttle Actuator Position Performance
P2119: Throttle Closed Position Performance
P2176: Minimum Throttle Position Not Learned
DTC P1682 P1682: Ignition 1 Switch Circuit 2
DTC P2120, P2122, P2123, P2125, P2127, P2128, or P2138 P2120: Accelerator Pedal Position (APP) Sensor 1 Circuit
P2122: Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage
P2123: Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage
P2125: Accelerator Pedal Position (APP) Sensor 2 Circuit
P2127: Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage
P2128: Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage
P2138: Accelerator Pedal Position (APP) Sensor 1-2 Correlation
DTC P2430-P2433 P2430: Secondary Air Injection (AIR) System Pressure Sensor Circuit
P2431: Secondary Air Injection (AIR) System Pressure Sensor Performance
P2432: Secondary Air Injection (AIR) System Pressure Sensor Circuit Low Voltage
P2433: Secondary Air Injection (AIR) System Pressure Sensor Circuit High Voltage
DTC P2440 P2440: Secondary Air Injection (AIR) System Shut-Off Valve Stuck Open
DTC P2444 P2444: Secondary Air Injection (AIR) System Pump Stuck ON
DTC P2534 P2534: Ignition 1 Switch Circuit Low Voltage
DTC P2544 P2544: Transmission Torque Request Circuit
DTC P2635 P2635: Fuel Pump Flow Performance