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 MANUALSCHEVROLET1986CAMARO BASE, 2.8 S, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSIS2.5L TBI TESTS W/CODES
1986 Chevrolet Camaro Base, 2.8 S, Standard
2.5L TBI Tests W/Codes
1986 Chevrolet Camaro Base, 2.8 S, StandardSECTION 2.5L TBI Tests W/Codes
- Model Identification
- Description
- Diagnostic System Operation
- Basic Diagnostic Procedure
- Entering Or Exiting Diagnostic Mode
- Clearing Trouble Codes
- Reading Trouble Codes
- Trouble Code Component Identification
- Trouble Code Determination (Hard Or Intermittent)
- Diagnostic Materials
- Diagnostic Tools
- "NONSCAN" Diagnostic Circuit Check (A/F/J/N/P Body)
- Scan Tester Usage
- Scan Tester - Test Data Parameters
- "Scan" Diagnostic Circuit Check (A/F/J/N/P Body)
- Chart A1 - No "SES" Light (A/F/J/N/P Body)
- Chart A2 - No Code 12, "SES" Always On (A/F/J/N/P Bodies)
- Chart A3 - Cranks But Won't Run (A/F/J/N/P Body)
- Chart A4 - Cranks But Won't Run (A/F/J/N/P Body)
- Chart A5 - Fuel System Diagnosis (A/F/J/N/P Body)
- Chart A6 - Fuel System Diagnosis (A/F/J/N/P Body)
- Chart A7 - Fuel System Diagnosis (A/F/J/N/P Body)
- Code 13 - Open O2 Circuit (A/F/J/N/P Body)
- Code 14 - Coolant Sensor Signal Volt Lo (A/F/J/N/P Body)
- Code 15 - Coolant Sensor Signal Volt Hi (A/F/J/N/P Body)
- Code 21 - TPS Signal Volt Hi (A/F/J/N/P Body)
- Code 22 - TPS Signal Volt Lo (A/F/J/N/P Body)
- Code 24 - Vehicle Speed Sensor (VSS) (A/F/J/N/P Body)
- Code 33 - Map Sensor Signal Volt Hi (A/F/J/N/P Body)
- Code 34 - Map Sensor Signal Volt Lo (A/F/J/N/P Body)
- Code 35 - Idle Air Control (IAC) (A/F/J/N/P Body)
- Code 42 - Electronic Spark Timing (Est) (A/F/J/N/P Body)
- Code 44 - Lean Exhaust Indication (A/F/J/N/P Body)
- Code 45 - Rich Exhaust Indication (A/F/J/N/P Body)
- Code 51 - Faulty MEMCAL (A/F/J/N/P Body)
- Code 52 - Fuel CALPAK Missing
- Code 55 - ECM (A/F/J/N/P Body)
- ECM Replacement Check Chart - C1
- Chart C1A - Park/Neutral Switch A/T (A/F/J/N/P Body)
- Chart C1B - 2.5L Crank Signal (P Body)
- Chart C1D - Map Output Check (A/F/J/N/P Body)
- Chart C1E - P/S Pressure Switch (A/F/J/N Body)
- Chart C4B - 2.5L Ignition System Check (A/F/N/P Body)
- Chart C8 - 125C TCC (A/N Body)
- Chart C8A - 700-4R TCC (F Body)
- Chart C8B - M/T Shift Light (F Body)
- Chart C9 - 2.5L M/T Shift Light (J/N/P Body)
- Chart C10 - 2.5L A/C Clutch Control (A/F Body)
- Chart C10 - 2.5L A/C Clutch Control (P Body)
- Chart C10A - A/C Clutch Control (J/N Body)
- Chart C12 - 2.5L Engine Cooling Fan (A Body)
- Chart C12A - Engine Cooling Fan (J/N Body)
- Component Locations
- ECM Terminal Voltage
- Wiring Diagram
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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.