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.
2002 Mitsubishi Montero XLSFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Definitions
NOTE:
DTCs can only be retrieved by using a scan tool. See ENTERING ON-BOARD DIAGNOSTICS under SELF-DIAGNOSTIC SYSTEM.
When Diagnostic Trouble Code (DTC) is obtained, refer to appropriate DTC test procedure under DIAGNOSTIC TESTS .
DIAGNOSTIC TROUBLE CODE INDEX
| DTC (1) | Description | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| P0101 | Volume Airflow Circuit Range/Performance Problem | ||||||||
| P0102 | Volume Airflow Circuit Low Input | ||||||||
| P0106 (4) | Barometric Pressure Circuit Range/Performance Problem | ||||||||
| P0107 | Barometric Pressure Circuit Low Input | ||||||||
| P0108 | Barometric Pressure Circuit High Input | ||||||||
| P0111 | Intake Air Temperature Circuit Range/Performance Problem | ||||||||
| P0112 | Intake Air Temperature Circuit Low Input | ||||||||
| P0113 | Intake Air Temperature Circuit High Input | ||||||||
| P0116 | Engine Coolant Temperature Circuit Range/Performance Problem | ||||||||
| P0117 | Engine Coolant Temperature Circuit Low Input | ||||||||
| P0118 | Engine Coolant Temperature Circuit High Input | ||||||||
| P0121 | Throttle Position Sensor Circuit Range/Performance Problem | ||||||||
| P0122 | Throttle Position Sensor Circuit Low Input | ||||||||
| P0123 | Throttle Position Sensor Circuit High Input | ||||||||
| P0125 (2) | Insufficient Coolant Temperature For Closed Loop Fuel Control | ||||||||
| P0128 | Coolant Thermostat Malfunction | ||||||||
| P0132 | Right Front HO2S Circuit High Voltage (Bank 1 Sensor 1) | ||||||||
| P0133 | Right Front HO2S Circuit Slow Response (Bank 1 Sensor 1) | ||||||||
| P0134 (4) | Right Front HO2S Circuit No Activity Detected (Bank 1 Sensor 1) | ||||||||
| P0135 | Right Front HO2S Heater Circuit Malfunction (Bank 1 Sensor 1) | ||||||||
| P0137 | Right Rear HO2S Circuit Low Voltage (Bank 1 Sensor 2) | ||||||||
| P0138 | Right Rear HO2S Circuit High Voltage (Bank 1 Sensor 2) | ||||||||
| P0139 | Right Rear HO2S Circuit Slow Response (Bank 1 Sensor 2) | ||||||||
| P0141 | Right Rear HO2S Heater Circuit Malfunction (Bank 1 Sensor 2) | ||||||||
| P0152 | Left Front HO2S Circuit High Voltage (Bank 2 Sensor 1) | ||||||||
| P0153 | Left Front HO2S Circuit Slow Response (Bank 2 Sensor 1) | ||||||||
| P0154 (4) | Left Front HO2S Circuit No Activity Detected (Bank 2 Sensor 1) | ||||||||
| P0155 | Left Front HO2S Heater Circuit Malfunction (Bank 2 Sensor 1) | ||||||||
| P0157 | Left Rear HO2S Circuit Low Voltage (Bank 2 Sensor 2) | ||||||||
| P0158 | Left Rear HO2S Circuit High Voltage (Bank 2 Sensor 2) | ||||||||
| P0159 | Left Rear HO2S Circuit Slow Response (Bank 2 Sensor 2) | ||||||||
| P0161 | Left Rear HO2S Heater Circuit Malfunction (Bank 2 Sensor 2) | ||||||||
| P0171 | Right Bank System Too Lean (Bank 1) | ||||||||
| P0172 | Right Bank System Too Rich (Bank 1) | ||||||||
| P0174 | Left Bank System Too Lean (Bank 2) | ||||||||
| P0175 | Left Bank System Too Rich (Bank 2) | ||||||||
| P0181 | Fuel Temperature Sensor Circuit Range/Performance Problem | ||||||||
| P0182 | Fuel Temperature Sensor Circuit Low Input | ||||||||
| P0183 | Fuel Temperature Sensor Circuit High Input | ||||||||
| P0201 | Fuel Injector No. 1 Circuit Malfunction | ||||||||
| P0202 | Fuel Injector No. 2 Circuit Malfunction | ||||||||
| P0203 | Fuel Injector No. 3 Circuit Malfunction | ||||||||
| P0204 | Fuel Injector No. 4 Circuit Malfunction | ||||||||
| P0205 | Fuel Injector No. 5 Circuit Malfunction | ||||||||
| P0206 | Fuel Injector No. 6 Circuit Malfunction | ||||||||
| P0300 | Random/Multiple Cylinder Misfire Detected | ||||||||
| P0301 | Cylinder No. 1 Misfire Detected | ||||||||
| P0302 | Cylinder No. 2 Misfire Detected | ||||||||
| P0303 | Cylinder No. 3 Misfire Detected | ||||||||
| P0304 | Cylinder No. 4 Misfire Detected | ||||||||
| P0305 | Cylinder No. 5 Misfire Detected | ||||||||
| P0306 | Cylinder No. 6 Misfire Detected | ||||||||
| P0325 | Knock Sensor Circuit Malfunction | ||||||||
| P0335 | Crankshaft Position Sensor Circuit Malfunction | ||||||||
| P0340 | Camshaft Position Sensor Circuit Malfunction | ||||||||
| P0401 | EGR Insufficient Flow Detected | ||||||||
| P0403 | EGR Solenoid Circuit Problem | ||||||||
| P0421 | Right Warm Up Catalyst Efficiency Below Threshold (Bank 1) | ||||||||
| P0431 | Left Warm Up Catalyst Efficiency Below Threshold (Bank 2) | ||||||||
| P0441 | EVAP Emission Control System Incorrect Purge Flow | ||||||||
| P0442 | EVAP Emission Control System Small Leak Detected (1mm) | ||||||||
| P0443 | EVAP Emission Control System Purge Control Valve Circuit Problem | ||||||||
| P0446 | EVAP Emission Control System Vent Control Malfunction | ||||||||
| P0451 | EVAP Emission Control System Pressure Sensor Range/Performance Problem | ||||||||
| P0452 | EVAP Emission Control System Pressure Sensor Low Input | ||||||||
| P0453 | EVAP Emission Control System Pressure Sensor High Input | ||||||||
| P0455 | EVAP Emission Control System Large Leak Detected | ||||||||
| P0456 | EVAP Emission Control System Small Leak Detected (0.5mm) | ||||||||
| P0461 | Fuel Level Sensor Circuit Range/Performance Problem | ||||||||
| P0500 (3) | Vehicle Speed Sensor Signal Malfunction | ||||||||
| P0506 | Idle Control System RPM Lower Than Expected | ||||||||
| P0507 | Idle Control System RPM Higher Than Expected | ||||||||
| P0551 | Power Steering Pressure Sensor Circuit Range/Performance Problem | ||||||||
| P0705 (3) | Transmission Range Sensor Circuit Malfunction (PRNDL Input) | ||||||||
| P0712 (3) | Transmission Fluid Temperature Sensor Low Input | ||||||||
| P0713 (3) | Transmission Fluid Temperature Sensor High Input | ||||||||
| P0715 (3) | Input/Turbine Speed Sensor Circuit Malfunction | ||||||||
| P0720 (3) | Output Speed Sensor Circuit Malfunction | ||||||||
| P0731 (3) | Gear 1 Incorrect | ||||||||
| P0732 (3) | Gear 2 Incorrect | ||||||||
| P0733 (3) | Gear 3 Incorrect | ||||||||
| P0734 (3) | Gear 4 Incorrect | ||||||||
| P0735 (3) | Gear 5 Incorrect (5 A/T Only) | ||||||||
| P0736 (3) | Gear R Incorrect | ||||||||
| P0741 (3) | Torque Converter Clutch Circuit Performance Or Stuck Off | ||||||||
| P0742 (3) | Torque Converter Clutch Circuit Performance Or Stuck On | ||||||||
| P0743 (3) | Torque Converter Clutch Circuit Electrical Problem | ||||||||
| P0753 (2)(3) | Shift Solenoid "A" Malfunction | ||||||||
| P0758 (2)(3) | Shift Solenoid "B" Malfunction | ||||||||
| P0763 (2)(3) | Shift Solenoid "C" Malfunction | ||||||||
| P0768 (2)(3) | Shift Solenoid "D" Malfunction | ||||||||
| P0773 (2)(3) | Shift Solenoid "E" Malfunction (5 A/T Only) | ||||||||
| P1400 | Manifold Differential Pressure Sensor Circuit Malfunction | ||||||||
| P1603 (4) | Battery Backup Circuit Malfunction | ||||||||
| P1610 | Immobilizer Malfunction | ||||||||
| P1751 (3) | A/T Control Relay Malfunction | ||||||||
|
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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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