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 MANUALSCHEVROLET2000CAVALIER BASE, 2D COUPE, AUTOMATIC, 4T40E/MN4REPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM - BASIC DIAGNOSTIC PROCEDURESNO START DIAGNOSISNO START - ENGINE CRANKS OKAY (2.2L - SATURN)GENERAL INSPECTION
2000 Chevrolet Cavalier Base, 2D Coupe, Automatic, 4T40E/MN4
General Inspection
2000 Chevrolet Cavalier Base, 2D Coupe, Automatic, 4T40E/MN4SECTION General Inspection
- Perform OBD system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article. After performing OBD system check, go to next step.
- If any BCM communication or Passlock(R) DTCs (P1630, P1631, P1632, P1626 or U1064) are set, diagnose DTCs first. See appropriate SELF-DIAGNOSTICS article, or appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If listed DTCs are not set, go to next step.
- Using scan tool, monitor ignition voltage. If voltage is less than 2 volts, see PCM INPUT CIRCUITS . If voltage is not less than 2 volts, go to next step.
- If any PCM internal DTCs (P0601or P0602) are set, diagnose DTCs first. See appropriate SELF-DIAGNOSTICS article. If listed DTCs are not set, go to next step.
- If all 4 injector DTCs (P0201, P0202, P0203 and P0204) are set, repair ignition voltage to injectors. Check INJECTOR fuse (10-amp) located in underhood fuse block. If listed DTCs are not set, go to next step.
- If any sensor DTCs (P0107, P0108, P0122, P0123, P0530, P0452 or P0453) are set, diagnose DTCs first. See appropriate SELF-DIAGNOSTICS article. If listed DTCs are not set, go to next step.
- While cranking engine, monitor CKP active counter with scan tool. If counter increments, go to next step. If counter does not increment, see IGNITION MODULE CIRCUITS .
- Using scan tool, monitor CAL COMPRESSION OUTPUT. If any 1s are present, go to FUEL SYSTEM CIRCUITS . If no 1s are present, go to IGNITION COIL CIRCUITS .
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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.