Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - 2.4L - INTRODUCTION (2 OF 2)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX

2006 Chevrolet Cobalt SS, 4D Sedan, Standard

Diagnostic Code Index

2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Diagnostic Code Index

DIAGNOSTIC CODE INDEX

DTC	Description
DTC P0010, P0011, P0013, or P0014	Camshaft Position (CMP)
DTC P0016	Crankshaft Position (CKP) - Intake Camshaft Position (CMP) Correlation
DTC P0017	Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation
DTC P0030, P0036, P0053, P0054, P0135, or P0141	HO2S Heater
DTC P0068 or P0121	Throttle Body Airflow Performance Throttle Position (TP) Sensor 1 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/High Frequency
DTC P0106	Manifold Absolute Pressure (MAP) Sensor Performance
DTC P0107 or P0108	Manifold Absolute Pressure (MAP) Sensor Circuit Low/High Voltage
DTC P0112 or P0113	Intake Air Temperature (IAT) Sensor Circuit Low/High Voltage
DTC P0116	Engine Coolant Temperature (ECT) Sensor Performance
DTC P0117 or P0118	Engine Coolant Temperature (ECT) Sensor Circuit Low/High Voltage
DTC P0120, P0122, P0123, P0220, P0222, P0223, or P2135	Throttle Position (TP) Sensor Circuit
DTC P0125 or P0128	Engine Coolant Temperature (ECT)
DTC P0131, P0132, P0137, P0138, P2A00, or P2A01	HO2S Circuit
DTC P0133, P0134, P0140, or P1133	HO2S Circuit
DTC P0171 or P0172	Fuel Trim System Lean/Rich
DTC P0201-P0204	Injector 1-4 Control Circuit
DTC P0230	Fuel Pump Relay Control Circuit
DTC P0300	Engine Misfire Detected
DTC P0315	Crankshaft Position (CKP) System Variation Not Learned
DTC P0324, P0325, P0326, P0327, or P0328	Knock Sensor (KS)
DTC P0335	Crankshaft Position (CKP) Sensor Circuit
DTC P0336	Crankshaft Position (CKP) Sensor Performance
DTC P0340, P0341, P0365, or P0366	CMP Sensor
DTC P0351-P0354	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 P0420	DTC P0420 Catalyst System Low Efficiency
DTC P0442	DTC P0442 Evaporative Emissions (EVAP) System Small Leak Detected
DTC P0443 or P0449	DTC P0443 Evaporative Emission (EVAP) Purge Solenoid Control Circuit DTC P0449 Evaporative Emission (EVAP) Vent Solenoid Control Circuit
DTC P0446	DTC P0446 Evaporative Emission (EVAP) Vent System Performance
DTC P0451, P0452, P0453, or P0454	DTC P0451 Fuel Tank Pressure (FTP) Sensor Performance DTC P0452 Fuel Tank Pressure (FTP) Sensor Circuit Low Voltage DTC P0453 Fuel Tank Pressure (FTP) Sensor Circuit High Voltage DTC P0454 Fuel Tank Pressure (FTP) Sensor Intermittent
DTC P0455	DTC P0455 Evaporative Emission (EVAP) System Large Leak
DTC P0496	DTC P0496 Evaporative Emission System Flow During Non-Purge
DTC P0506 or P0507	DTC P0506 Idle Speed Low DTC P0507 Idle Speed High
DTC P0601-P0607, P060E, P062F, P1600, P1621, P1627, P1681, P1683, or P2610	DTC P0601 Control Module Read Only Memory (ROM) DTC P0602 Control Module Not Programmed DTC P0603 Control Module Long Term Memory Reset DTC P0604 Control Module Random Access Memory (RAM) DTC P0606 Control Module Internal Performance DTC P0607 Control Module Performance DTC P062F Control Module Long Term Memory Performance DTC P2610 Control Module Ignition Off Timer Performance
DTC P060D	DTC P060D Control Module Accelerator Pedal Position (APP) System Performance
DTC P0641 or P0651	DTC P0641 5-Volt Reference 1 Circuit DTC P0651 5-Volt Reference 2 Circuit
DTC P0650	DTC P0650 Malfunction Indicator Lamp (MIL) Control Circuit
DTC P0685, P0689, or P0690	DTC P0685 Engine Controls Ignition Relay Control Circuit DTC P0689 Engine Controls Ignition Relay Feedback Circuit Low Voltage DTC P0690 Engine Controls Ignition Relay Feedback Circuit High Voltage
DTC P0700 or P1700	DTC P0700 Transmission Control Module (TCM) Requested MIL Illumination
DTC P1174	DTC P1174 Fuel Trim Cylinder Balance
DTC P1400	DTC P1400 Cold Start Emission Reduction Control System
DTC P1516, P2101, P2119, or P2176	DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance DTC P2101 Throttle Actuator Position Performance DTC P2119 Throttle Closed Position Performance DTC P2176 Throttle Closed Position Performance
DTC P1682	DTC P1682 Ignition 1 Switch Circuit 2
DTC P2120, P2122, P2123, P2125, P2127, P2128, or P2138	DTC P2120 Accelerator Pedal Position (APP) Sensor 1 Circuit DTC P2122 Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage DTC P2123 Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage DTC P2125 Accelerator Pedal Position (APP) Sensor 2 Circuit DTC P2127 Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage DTC P2128 Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage DTC P2138 Accelerator Pedal Position (APP) Sensor 1-2 Correlation

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.