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 MANUALSISUZU1992RODEO S, 3.1 Z, RWD, MUA5CREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 2.6L
1992 Isuzu Rodeo S, 3.1 Z, RWD, MUA5C
Engine Controls - Tests W/Codes - 2.6L
1992 Isuzu Rodeo S, 3.1 Z, RWD, MUA5CSECTION Engine Controls - Tests W/Codes - 2.6L
- Introduction
- Self-Diagnostic System
- Code Charts
- Read This First
- ECM Location
- Trouble Code Definition
- ECM Terminal Identification
- Diagnostic Circuit Check
- Test No. 1 - ECM Power Supply
- Test No. 2 - Check Engine Light Inoperative
- Test No. 3 - Will Not Flash Code No. 12
- Code 12 - System Normal
- Code 13 - Oxygen Sensor Circuit
- Code 14 & 15 - Coolant Temperature Sensor
- Code 21 - Throttle Valve Switch (Idle & Full Throttle)
- Code 22 - Starter Signal
- Code 23, 35 & 54 - Power Transistor Circuit
- Code 25 & 53 - Pressure Regulator VSV
- Code 26 & 27 - Canister Purge VSV
- Code 32 - EGR System Malfunction
- Code 33 - Fuel Injector Circuit (Open Or Grounded)
- Code 34 - EGR Gas Temperature Sensor
- Code 35 - Power Transistor Circuit
- Code 41 - Crank Angle Sensor Signal
- Code 43 & 65 - Throttle Valve Switch
- Code 44 & 45 - Oxygen Sensor-Lean/Rich Fuel Mixture
- Code 51 & 52 - Faulty ECM Ram/ROM
- Code 53 - Pressure Regulator VSV
- Code 54 - Power Transistor Circuit
- Code 61 & 62 - Airflow Sensor Signal
- Code 63 - Vehicle Speed Sensor Signal
- Code 64 - Fuel Injector Circuit (ECM Transistor)
- Code 65 - Throttle Valve Switch
- Summary
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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.