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.
1998 Isuzu Oasis LSFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes - Tests
- Connector Identification
- Diagnostic Trouble Code Identification
- Circuit Tests
- Notes
- Malfunction Indicator Light (Mil) Malfunction
- DTC P0107 - Map Sensor Circuit Low Voltage Input (High Vacuum)
- DTC P0108 - Map Sensor Circuit High Voltage Input (Low Vacuum)
- DTC P0112 - Intake Air Temperature (IAT) Sensor Low Voltage Input
- DTC P0113 - Intake Air Temperature (IAT) Sensor High Voltage Input
- DTC P0116 - Engine Coolant Temperature Sensor Range/Performance Problem
- DTC P0117 - Engine Coolant Temperature Sensor Low Voltage Input
- DTC P0118 - Engine Coolant Temperature Sensor High Voltage Input
- DTC P0122 - Throttle Position (TP) Sensor Low Voltage Input
- DTC P0123 - Throttle Position (TP) Sensor High Voltage Input
- DTC P0131 - Primary Ho2S-1 Sensor Low Voltage
- DTC P0132 - Primary Ho2S-1 Sensor High Voltage
- DTC P0133 - Primary Ho2S-1 Sensor Slow Response
- DTC P0135 Or DTC P0141 - Ho2S Sensor Heater Circuit Malfunction
- DTC P0137 - Secondary Ho2S-2 Sensor Low Voltage
- DTC P0138 - Secondary Ho2S-2 Sensor High Voltage
- DTC P0139 - Secondary Ho2S-2 Sensor Slow Response
- DTC P0171 & DTC P0172 - Fuel Supply System (Too Lean Or Too Rich)
- DTC P0300 & P0301-P0304 - Random Cylinder Misfire Detected
- DTC P0301-P0304 - Misfire In One Cylinder Detected
- DTC P0325 - Knock Sensor (KS) Circuit Malfunction
- DTC P0335, DTC P0336, DTC P1361 & DTC P1362 - CKP/TDC Sensor
- DTC P0401 - EGR System Insufficient Flow
- DTC P0420 - Catalytic System Efficiency Below Threshold
- DTC P0452 - Fuel Tank Pressure (Ftp) Sensor Low Voltage
- DTC P0453 - Fuel Tank Pressure (Ftp) Sensor High Voltage
- DTC P0505 - Idle Control System Malfunction
- DTC P1106 - BARO Sensor Range/Performance Problem
- DTC P1107 & DTC P1108 - BARO Sensor
- DTC P1121 & DTC P1122 - Throttle Position (TP) Sensor
- DTC P1128 - Manifold Absolute Pressure (Map) Lower Than Expected
- DTC P1129 - Manifold Absolute Pressure (Map) Higher Than Expected
- DTC P1259 - VTEC Pressure Switch & Solenoid Valve Circuits
- DTC P1297 - Electrical Load Detector (Eld) Low Voltage Input
- DTC P1298 - Electrical Load Detector (Eld) High Voltage Input
- DTC P1359 - Crankshaft Position/Top Dead Center (CKP/TDC) Sensor
- DTC P1361 & DTC P1362 - TDC Sensor
- DTC P1381 & DTC P1382 - CYP Sensor
- DTC P1456 & DTC P1457 - EVAP System Leak Detected
- DTC P1491 - EGR System Malfunction
- DTC P1498 - EGR Valve Lift Sensor High Voltage
- DTC P1519 - Idle Air Control (IAC) Valve
- DTC P1607 - Pcm Internal Circuit
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.