LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2006 >> Impala LTZ >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 3.9L - Introduction (2 Of 2) >> Diagnostic Information and Procedures >> Diagnostic Code Index
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

DTC Description
DTC P0010 or P0011 Camshaft Position (CMP) Actuator Solenoid Control Circuit, Camshaft Position (CMP) System Performance
DTC P0016 Crankshaft Position (CKP) Camshaft Position (CMP) Correlation
DTC P0030, P0053, or P0135 HO2S Heater Control Circuit Bank 1 Sensor 1, HO2S Heater Resistance Bank 1 Sensor 1, HO2S Heater Performance Bank 1 Sensor 1
DTC P0036, P0054, or P0141 HO2S Heater Control Circuit Bank 1 Sensor 2, HO2S Heater Resistance Bank 1 Sensor 2, HO2S Heater Performance Bank 1 Sensor 2
DTC P0068 or P0121 Throttle Body Airflow Performance, Throttle Position (TP) Sensor Performance
DTC P0101 or P1101 Mass Air Flow (MAF) Sensor Performance, Intake Air Flow System Performance
DTC P0102 or P0103 Mass Air Flow (MAF) Sensor Circuit Low Frequency, Mass Air Flow (MAF) Sensor Circuit High Frequency
DTC P0106, P0107, or P0108 Manifold Absolute Pressure (MAP) Sensor Performance, Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage, Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
DTC P0112 or P0113 Intake Air Temperature (IAT) Sensor Circuit Low Voltage, Intake Air Temperature (IAT) Sensor Circuit High Voltage
DTC P0116 or P0128 Engine Coolant Temperature (ECT) Sensor Performance, Engine Coolant Temperature (ECT) Below Thermostat Regulations Temperature
DTC P0117 or P0118 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage, Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
DTC P0120, P0122, P0123, P0220, P0222, P0223, or P2135 Refer to DTC P0120, P0122, P0123, P0220, P0222, P0223, or P2135
DTC P0131, P0132, or P0134 HO2S Circuit Low Voltage Bank 1 Sensor 1, HO2S Circuit High Voltage Bank 1 Sensor 1, HO2S Circuit Insufficient Activity Bank 1 Sensor 1
DTC P0133, P1133, or P2A00 HO2S Slow Response Bank 1 Sensor 1, HO2S Insufficient Switching Bank 1 Sensor 1, HO2S Circuit Closed Loop (CL) Performance Bank 1 Sensor 1
DTC P0137, P0138, or P0140 HO2S Circuit Low Voltage Bank 1 Sensor 2, HO2S Circuit High Voltage Bank 1 Sensor 2, HO2S Circuit Insufficient Activity Bank 1 Sensor 2
DTC P0171 or P0172 Fuel Trim System Lean Bank 1, Fuel Trim System Rich Bank 1
DTC P0201-P0206 Refer to DTC P0201-P0206
DTC P0230 Fuel Pump Relay Control Circuit
DTC P0300 Engine Misfire Detected
DTC P0315 Crankshaft Position (CKP) System Variation Not Learned
DTC P0325, P0326, P0327, or P0332 Refer to DTC P0325, P0326, P0327, or P0332
DTC P0335 or P0336 Crankshaft Position (CKP) Sensor Circuit, Crankshaft Position (CKP) Sensor Performance
DTC P0340, P0341 or P0342 Camshaft Position (CMP) Sensor Circuit, Camshaft Position (CMP) Sensor Performance
DTC P0351, P0352, or P0353 Ignition Coil 1 and 4 Control Circuit, Ignition Coil 2 and 5 Control Circuit, Ignition Coil 3 and 6 Control Circuit
DTC P0420 Catalyst System Low Efficiency Bank 1
DTC P0442 Evaporative Emissions (EVAP) System Small Leak Detected
DTC P0443 or P0449 Evaporative Emission (EVAP) Purge Solenoid Control Circuit, Evaporative Emission (EVAP) Vent Solenoid Control Circuit
DTC P0446 Evaporative Emissions (EVAP) Vent System Performance
DTC P0451, P0452, P0453, or P0454 Refer to DTC P0451, P0452, P0453, or P0454
DTC P0455 Evaporative Emission (EVAP) System Large Leak
DTC P0496 Evaporative Emission System Flow During Non-Purge
DTC P0506 or P0507 Idle Speed Low, Idle Speed High
DTC P0601-P0604, P0606, P0607, P060D, P062F, or P2610 Refer to DTC P0601-P0604, P0606, P0607, P060D, P062F, or P2610
DTC P0641 or P0651 5-Volt Reference 1 Circuit, 5-Volt Reference 2 Circuit
DTC P0650 Malfunction Indicator Lamp (MIL) Control Circuit
DTC P0660 Intake Manifold Tuning (IMT) Valve Solenoid Control Circuit
DTC P0685, P0689, or P0690 Engine Controls Ignition Relay Control Circuit, Engine Controls Ignition Relay Feedback Circuit Low Voltage, Engine Controls Ignition Relay Feedback Circuit High Voltage
DTC P0700 Transmission Control Module (TCM) Requested MIL Illumination
DTC P1174 Air Fuel Imbalance Bank 1
DTC P1400 Cold Start Emission Reduction Control System
DTC P1516, P2101, P2119, or P2176 Refer to DTC P1516, P2101, P2119, or P2176
DTC P1682 Ignition 1 Switch Circuit 2
DTC P2070 or P2071 Intake Manifold Tuning (IMT) Valve Stuck Open or Intake Manifold Tuning (IMT) Valve Stuck Closed
DTC P2077 or P2078 Intake Manifold Tuning (IMT) Valve Position Sensor Circuit Low Voltage or Intake Manifold Tuning (IMT) Valve Position Sensor Circuit High Voltage
DTC P2120, P2122, P2123, P2125, P2127, P2128, or P2138 Refer to DTC P2120, P2122, P2123, P2125, P2127, P2128, or P2138
DTC P2A01 HO2S Circuit Closed Loop (CL) Performance Bank 1 Sensor 2