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.
2001 Mitsubishi Eclipse GS, AutomaticFACTORY 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 | ||||||
| P0103 | Volume Airflow Circuit High Input | ||||||
| P0107 | Barometric Pressure Circuit Low Input | ||||||
| P0108 | Barometric Pressure Circuit High Input | ||||||
| P0111 | Intake Air Temperature Circuit Range/Performance Problem | ||||||
| P0115 | Engine Coolant Temperature Circuit High Input | ||||||
| P0116 | Engine Coolant Temperature Circuit Range/Performance Problem | ||||||
| P0117 | Engine Coolant Temperature Circuit Low Input | ||||||
| P0121 | Throttle Position Sensor Circuit Range/Performance Problem | ||||||
| P0122 | Throttle Position Sensor Circuit Low Input | ||||||
| P0123 | Throttle Position Sensor Circuit High Input | ||||||
| P0128 | Coolant Thermostat Malfunction | ||||||
| P0130 | Front Heated Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 1) | ||||||
| P0133 | Front Heated Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1) | ||||||
| P0134 | Front Heated Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1) | ||||||
| P0135 | Front Heated Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1) | ||||||
| P0136 | Rear Heated Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2) | ||||||
| P0139 | Rear Heated Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2) | ||||||
| P0141 | Rear Heated Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 2) | ||||||
| P0150 | Front Heated Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 1) | ||||||
| P0153 | Front Heated Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 1) | ||||||
| P0154 | Front Heated Oxygen Sensor Circuit No Activity Detected (Bank 2 Sensor 1) | ||||||
| P0155 | Front Heated Oxygen Sensor Heater Circuit Malfunction (Bank 2 Sensor 1) | ||||||
| P0156 | Rear Heated Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2) | ||||||
| P0159 | Rear Heated Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2) | ||||||
| P0161 | Rear Heated Oxygen Sensor Heater Circuit Malfunction (Bank 2 Sensor 2) | ||||||
| P0171 | System Too Lean (Bank 1) | ||||||
| P0172 | System Too Rich (Bank 1) | ||||||
| P0174 | System Too Lean (Bank 2) | ||||||
| P0175 | System Too Rich (Bank 2) | ||||||
| P0201 | Injector No. 1 Circuit Malfunction | ||||||
| P0202 | Injector No. 2 Circuit Malfunction | ||||||
| P0203 | Injector No. 3 Circuit Malfunction | ||||||
| P0204 | Injector No. 4 Circuit Malfunction | ||||||
| P0205 | Injector No. 5 Circuit Malfunction | ||||||
| P0206 | Injector No. 6 Circuit Malfunction | ||||||
| P0300 (2) | Random Misfire Detected | ||||||
| P0301 (2) | Cylinder No. 1 Misfire Detected | ||||||
| P0302 (2) | Cylinder No. 2 Misfire Detected | ||||||
| P0303 (2) | Cylinder No. 3 Misfire Detected | ||||||
| P0304 (2) | Cylinder No. 4 Misfire Detected | ||||||
| P0305 (2) | Cylinder No. 5 Misfire Detected | ||||||
| P0306 (2) | Cylinder No. 6 Misfire Detected | ||||||
| P0325 | Knock Sensor Circuit Malfunction | ||||||
| P0335 | CKP Sensor Circuit Malfunction | ||||||
| P0340 | CMP Sensor Circuit Malfunction | ||||||
| P0401 | EGR Insufficient Flow Detected | ||||||
| P0403 | EGR Solenoid Malfunction | ||||||
| P0421 | Warm Up Catalyst Efficiency Below Threshold (Bank 1) | ||||||
| P0431 | Warm Up Catalyst Efficiency Below Threshold (Bank 2) | ||||||
| P0442 | EVAP System Small Leak Detected | ||||||
| P0443 | EVAP System Purge Solenoid Circuit Malfunction | ||||||
| P0446 | EVAP System Vent Control Malfunction | ||||||
| P0450 | EVAP System Pressure Sensor Malfunction | ||||||
| P0451 | EVAP System Pressure Sensor Range/Performance Problem | ||||||
| P0455 | EVAP System Large Leak Detected | ||||||
| P0500 | Vehicle Speed Sensor 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) | ||||||
| P0710 (3) | Transmission Fluid Temperature Sensor Circuit Malfunction | ||||||
| P0715 (3) | Input/Turbine Speed Sensor Circuit Malfunction | ||||||
| P0720 (3) | Output Speed Sensor Circuit Malfunction | ||||||
| P0725 (3) | Engine Speed Input Circuit Malfunction | ||||||
| P0740 (3) | Torque Converter Clutch System Malfunction | ||||||
| P0750 (3) | Shift Solenoid "A" Malfunction | ||||||
| P0755 (3) | Shift Solenoid "B" Malfunction | ||||||
| P0760 (3) | Shift Solenoid "C" Malfunction | ||||||
| P0765 (3) | Shift Solenoid "D" Malfunction | ||||||
| P1400 | Manifold Differential Pressure Sensor Circuit Malfunction | ||||||
| P1500 | Generator FR Terminal Circuit Malfunction | ||||||
| P1603 | Battery Backup Line 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.