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 MANUALSCHEVROLET1988CAVALIER VL, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSIS2.0L VIN [1] TBI CEC TESTS W/CODES
1988 Chevrolet Cavalier VL, Standard
2.0L VIN [1] TBI CEC Tests W/Codes
1988 Chevrolet Cavalier VL, StandardSECTION 2.0L VIN [1] TBI CEC Tests W/Codes
- * Please Read This First *
- Diagnostic Circuit Check
- Chart A-1: No "SES" Light
- Chart A-2: No Code 12, "SES" Light On Steady
- Chart A-3: Cranks But Won't Run
- Chart A-5: Fuel Pump Relay Circuit (J Body)
- Chart A-5: Fuel Pump Relay Circuit (Late L Body)
- Chart A-5: Fuel Pump Relay Circuit (Early L Body)
- Chart A-7: Fuel System Diagnosis (1 Of 2)
- Chart B-1: Restricted Exhaust System Check
- Code 13, Open Oxygen Sensor Circuit
- Code 14: Coolant Sensor Temp Too Hi
- Code 15: Coolant Sensor Temp Too Lo
- Code 21: TPS Signal Voltage High
- Code 22: TPS Signal Voltage Lo
- Code 23: Mat Temp Too Lo
- Code 24: Vehicle Speed Sensor (VSS) (L Body)
- Code 24: Vehicle Speed Sensor (VSS) (J Body)
- Code 25: Mat Temp Too High
- Code 32: EGR System Error J Body
- Code 33: Map Sensor Signal Volt Hi (J Body)
- Code 33: Map Sensor Signal Volt High (L Body)
- Code 34: Map Sensor Signal Volt Lo
- Code 42: Electronic Spark Timing (Est)
- Code 44: Lean Exhaust Indication
- Code 45: Rich Exhaust Indication
- Code 51: Prom/Mem-Cal Failure
- Code 53: System OVERVOLTAGE (L Body)
- Chart C-1A: Park/Neutral Switch Diagnosis (A/T)
- Chart C-1D: Map Output Check
- Chart C-1E: Power Steering Switch
- Chart C-2C: Idle Air Control
- Chart C-4D-1: Dis Misfire At Idle
- Chart C-4D-2: Dis Misfire Under Load
- Chart C-7: EGR Valve Check
- Chart C-8A: Transmission Converter Clutch
- Chart C-8B: M/T Shift Light
- Chart C-10: A/C Clutch Control (Early L Body)
- Chart C-12: Engine Cooling Fan (J Body)
- Chart C-12: Engine Cooling Fan (L Body)
- Component Locations
- Terminal Id
- Wiring Diagram
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.