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 MANUALSCHEVROLET1999CAMARO BASE, 2D CONVERTIBLE, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - TESTS W/CODES - INTRODUCTIONSELF-DIAGNOSTIC SYSTEMMIL ON STEADY2.2L & 2.4L
1999 Chevrolet Camaro Base, 2D Convertible, Automatic
2.2L & 2.4L
1999 Chevrolet Camaro Base, 2D Convertible, AutomaticSECTION 2.2L & 2.4L
- Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK . After performing OBD system check, go to next step.
- Turn ignition on, with engine off. If MIL illuminates, go to next step. If MIL does not illuminate, go to MIL INOPERATIVE .
- Connect scan tool. Using scan tool, command MIL on and off. If MIL turns on and off as commanded, go to step 8. If MIL does not turn on and off as commanded, go to next step.
- Turn ignition off. Disconnect PCM connectors. Turn ignition on. If MIL does not illuminate, go to step 7. If MIL illuminates, go to next step.
- Check for short to ground in MIL control circuit. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary. After repairs, go to step 8. If circuit is okay, go to next step.
- Replace instrument cluster. After repairs, go to step 8.
- Replace PCM. Perform PCM relearn procedures. After repairs, go to next step.
- Attempt to start engine. If engine starts and continues to run, go to next step. If engine does not start, or starts and stalls, go to step 1.
- Allow engine to reach normal operating temperature. Using scan tool, check for DTCs. If DTCs are present, diagnose DTCs. See DIAGNOSTIC TESTS in appropriate TESTS W/CODES article. If DTCs are not present, 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.