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 MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 86 (ENGINE CONTROLS SELF-DIAGNOSTICS)DIAGNOSTIC TESTSDTC P0351-P0358: IGNITION CONTROL CIRCUITDIAGNOSTIC PROCEDURES
2001 Chevrolet Cavalier LS, 2.4 T
Diagnostic Procedures
2001 Chevrolet Cavalier LS, 2.4 TSECTION Diagnostic Procedures
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Did you perform the Diagnostic System Check-Engine Controls? If yes, go to next step. If no, see DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS under SELF-DIAGNOSTIC SYSTEM.
- Observe the Freeze Frame/Failure Records data for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition cycle? If yes, go to next step. If no, see INTERMITTENT CONDITIONS under SELF-DIAGNOSTIC SYSTEM.
- Turn ignition OFF. Disconnect the respective ignition coil. Start the engine. Measure the frequency at the IC circuit using the DVOM set to DC Hertz. Is the frequency 3-20 Hz? If yes, go to step 7. If no, go to next step.
- Measure the voltage between the IC circuit and a good ground. Is the voltage more than 1 V? If yes, go to step 13. If no, go to next step.
- Turn ignition OFF. Disconnect the PCM connector. Test the IC circuit between the ignition coil connector and the PCM connector for continuity. If circuit test okay, go to next step. If no, go to step 14.
- Test the respective IC circuit for a short to ground. Did you find and correct the condition? If yes, go to step 17. If no, go to step 10.
- Turn ignition ON, with engine OFF. Probe the ignition 1 voltage circuit of the ignition coil with a test light connected to ground. Does the test light illuminate? If yes, go to next step. If no, go to step 11.
- Probe the ground circuit of the ignition coil with a test light connected to voltage. Does the test light illuminate? If yes, go to next step. If no, go to step 12.
- Test for an intermittent and/or poor connections at the ignition coil. Did you find and correct the condition? If yes, go to step 17. If no, go to step 15.
- Test for an intermittent and/or poor connections at the ignition coil. Did you find and correct the condition? If yes, go to step 17. If no, go to step 16.
- Repair the open in the ignition 1 voltage circuit. Did you complete the repair? If yes, go to step 17.
- Repair the open in the ground circuit for the ignition coil. Did you complete the repair? If yes, go to step 17.
- Repair the IC circuit for a short to voltage. Did you complete the repair? If yes, go to step 17.
- Repair open in the IC circuit. Did you complete the repair? If yes, go to step 17.
- Replace ignition coil. See IGNITION COILS under IGNITION SYSTEMS in REMOVAL & INSTALLATION - CORVETTE article. Did you complete the repair? If yes, go to step 17.
- Replace PCM. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in REMOVAL & INSTALLATION - CORVETTE article. Did you complete the replacement? If yes, go to next step.
- Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition? If yes, go to step 2. If no, go to next step.
- Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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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.