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.
1992 Isuzu Stylus RSFACTORY OEM SERVICE PROCEDURE
Trouble Code Identification
TROUBLE CODE IDENTIFICATION
| Code | System Affected | Probable Cause | ||||||
|---|---|---|---|---|---|---|---|---|
| 12 | System Normal | System Normal | ||||||
| 13 | O2 Sensor (Open) | Sensor or Circuit, ECM | ||||||
| 13 | O2 Sensor (Open) (1.6L DOHC Turbo) | Sensor or Circuit, ECM | ||||||
| 13 | O2 Sensor (Open) (1.6L SOHC) | Sensor or Circuit, ECM | ||||||
| 14 (1)(2) | Coolant Temp. Sensor (1.6L Turbo) | Sensor or Circuit, ECM | ||||||
| 14A (1) | Coolant Temp. Sensor (1.6L & 1.8L Non Turbo) | Sensor or Circuit, ECM | ||||||
| 14B (3) | Coolant Temp. Sensor (1.6L & 1.8L Non Turbo) | Sensor or Circuit, ECM | ||||||
| 15 (2)(3) | Coolant Temp. Sensor (1.6L Turbo) | Sensor or Circuit, ECM | ||||||
| 21 (2) | TPS Signal (High) (1.6L Turbo) | Sensor or Circuit, ECM | ||||||
| 21A | TPS Signal (High) (1.6L & 1.8L Non Turbo) | Sensor or Circuit, ECM | ||||||
| 21B | TPS Signal (Low) (1.6L & 1.8L Non Turbo) | Sensor or Circuit, ECM | ||||||
| 22 (2) | TPS Signal (Low) (1.6L Turbo) | Sensor or Circuit, ECM | ||||||
| 23 (2)(3) | MAT Sensor (1.6L Turbo) | Sensor or Circuit, ECM | ||||||
| 23A (3) | MAT Sensor (1.6L & 1.8L Non Turbo) | Sensor or Circuit, ECM | ||||||
| 23B (1) | MAT Sensor (1.6L & 1.8L Non Turbo) | Sensor or Circuit, ECM | ||||||
| 24 | Vehicle Speed Sensor (1.6L & 1.8L Non Turbo) | Sensor or Circuit, ECM | ||||||
| 24 | Vehicle Speed Sensor (1.6L Turbo) | Sensor or Circuit, ECM | ||||||
| 25 (1)(2) | MAT Sensor (1.6L Turbo) | Sensor or Circuit, ECM | ||||||
| 31 (2) | Turbo Overboost (1.6L Turbo) | Wastegate Actuator, Control Valve, Vacuum Hose, Air Filter, ECM | ||||||
| 32 | EGR Temp. Sensor (1.6L & 1.8L All Models) | EGR Valve, Sensor or Circuit, ECM | ||||||
| 33 (2) | MAP Sensor (High) (1.6L Turbo) | Sensor or Circuit, ECM | ||||||
| 33A | MAP Sensor (High) (1.6L & 1.8L Non Turbo) | Sensor or Circuit, ECM | ||||||
| 33B | MAP Sensor (Low) (1.6L & 1.8L Non Turbo) | Sensor or Circuit, ECM | ||||||
| 34 (2) | MAP Sensor (Low) (1.6L Turbo) | Sensor or Circuit, ECM | ||||||
| 41 (2) | Cam Signal (1.6L Turbo) | Sensor or Circuit, ECM | ||||||
| 42 | Elec. Spark Timing (1.6L & 1.8L Non Turbo) | Circuit, Ign. Module, ECM | ||||||
| 43 (2) | Elec. Spark Control (1.6L Turbo) | Knock Sensor or Circuit, MEM-CAL, ECM | ||||||
| 44 | O2 Sensor (Lean) (1.6L & 1.8L DOHC NON Turbo) | Injectors, Fuel Pressure, Exhaust Leaks, O2 Sensor or Circuit, ECM | ||||||
| 44 | O2 Sensor (Lean) (1.6L DOHC Turbo) | Injectors, Fuel Pressure, Exhaust Leaks, O2 Sensor or Circuit, ECM | ||||||
| 44 | O2 Sensor (Lean) (1.6L SOHC) | Injectors, Fuel Pressure, Exhaust Leaks, O2 Sensor or Circuit, ECM | ||||||
| 45 | O2 Sensor (Rich) (1.6L & 1.8L DOHC Non Turbo) | Injectors, Fuel Pressure, EGR, O2 Sensor or Circuit, MAP Sensor, TPS, Canister Purge, Ignition Shielding, ECM | ||||||
| 45 | O2 Sensor (Rich) (1.6L DOHC Turbo) | Injectors, Fuel Pressure, EGR, O2 Sensor or Circuit, MAP Sensor, TPS, Canister Purge, Ignition Shielding, ECM | ||||||
| 45 | O2 Sensor (Rich) (1.6L SOHC) | Injectors, Fuel Pressure, EGR, O2 Sensor or Circuit, MAP Sensor, TPS, Canister Purge, Ignition Shielding, ECM | ||||||
| 51 | ECM/MEM-CAL Failure (1.6L Turbo) | ECM, EEPROM or MEM-CAL Failure | ||||||
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Factory Service Tools
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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.
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