Mitsubishi Car 1999-05

1.5L L4 - Std

Print

1.5L L4 - Std

Trouble Code: P0100



Mass Airflow Sensor Circuit Malfunction

Possible Causes:



Intake air leaks after the MAF sensor location
 
MAF sensor signal circuit is open or shorted to ground
 
MAF sensor signal circuit is shorted to VREF or system power
 
MAF sensor power circuit is open (check power from MFI relay)
 
MAF sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0105



Barometric Pressure Sensor Circuit Malfunction

Possible Causes:



BARO sensor signal circuit is open or shorted to ground
 
BARO sensor signal circuit is shorted to VREF
 
BARO sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0110



Intake Air Temperature Sensor Circuit Malfunction

Possible Causes:



IAT sensor signal circuit is open or shorted to ground
 
IAT sensor signal circuit shorted to VREF or to system power
 
IAT sensor is damaged or has failed (out of calibration)
 
PCM has failed
 

Trouble Code: P0115



Engine Coolant Temperature Sensor Circuit Malfunction

Possible Causes:



ECT sensor circuit is open, shorted to ground or to VREF
 
ECT sensor is damaged or has failed (out of calibration)
 
PCM has failed
 

Trouble Code: P0120



TP Sensor Circuit Malfunction

Possible Causes:



TP sensor signal circuit open or shorted to ground
 
TP sensor ground circuit is open
 
TP sensor power circuit is open (check VREF circuit at PCM)
 
TP sensor is damaged or has failed
 
PCM has failed
 
TSB 99-13-008 (7/99) contains information related to this code
 

Trouble Code: P0125



Excessive Time To Enter Closed Loop

Possible Causes:



Check the operation of the thermostat (it may be stuck open)
 
ECT sensor signal circuit has high resistance
 
ECT sensor has failed
 
Inspect for low coolant level or an incorrect coolant mixture
 

Trouble Code: P0130



HO2S-11 (Bank 1 Sensor 1) Circuit Malfunction

Possible Causes:



HO2S signal circuit is open between the sensor and the PCM
 
HO2S signal circuit is shorted to sensor or chassis ground
 
HO2S signal circuit is shorted to VREF or system power (B+)
 
HO2S is damaged, contaminated or it has failed
 
PCM has failed
 

Trouble Code: P0135



HO2S-11 (Bank 1 Sensor 1) Heater Circuit Malfunction

Possible Causes:



HO2S heater control circuit is open or shorted to ground
 
HO2S heater control circuit is shorted to power
 
HO2S heater power circuit is open (check power from the relay)
 
HO2S heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P0136



HO2S-12 (Bank 1 Sensor 2) Circuit Malfunction

Possible Causes:



HO2S signal circuit is open between the sensor and the PCM
 
HO2S signal circuit is shorted to sensor or chassis ground
 
HO2S signal circuit is shorted to VREF or system power (B+)
 
HO2S is damaged, contaminated or it has failed
 
PCM has failed
 

Trouble Code: P0141



HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction

Possible Causes:



HO2S heater control circuit is open or shorted to ground
 
HO2S heater control circuit is shorted to power
 
HO2S heater power circuit is open (check power from the relay)
 
HO2S heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P0170



Fuel Trim Fault (Bank 1)

Possible Causes:



Air leaks after the MAF sensor, or in the EGR or PCV system
 
Base engine "mechanical" fault affecting one or more cylinders
 
Exhaust leaks located in front of the A/FS or HO2S location
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
 
Fuel delivery system supplying too little fuel during cruise or idle periods (e.g., faulty fuel pump or dirty, restricted fuel filter)
 
Fuel injector (one or more) dirty or pressure regulator has failed
 
HO2S is contaminated, deteriorated or it has failed
 
Vehicle driven low on fuel or until it ran out of fuel
 

Trouble Code: P0201



Fuel Injector 1 Circuit Malfunction

Possible Causes:



Injector control circuit is open or shorted to ground
 
Injector power circuit is open (check power from the MFI relay)
 
Fuel injector is damaged or has failed
 

Trouble Code: P0202



Fuel Injector 2 Circuit Malfunction

Possible Causes:



Injector control circuit is open or shorted to ground
 
Injector power circuit is open (check power from the MFI relay)
 
Fuel injector is damaged or has failed
 

Trouble Code: P0203



Fuel Injector 3 Circuit Malfunction

Possible Causes:



Injector control circuit is open or shorted to ground
 
Injector power circuit is open (check power from the MFI relay)
 
Fuel injector is damaged or has failed
 

Trouble Code: P0204



Fuel Injector 4 Circuit Malfunction

Possible Causes:



Injector control circuit is open or shorted to ground
 
Injector power circuit is open (check power from the MFI relay)
 
Fuel injector is damaged or has failed
 

Trouble Code: P0300



Random Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine mechanical fault that affects one or more cylinders
 
Erratic or interrupted CKP or CMP sensor signals
 
Fuel delivery component fault that affects one or more cylinders (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil or plug) in one or more cylinders
 

Trouble Code: P0301



Cylinder 1 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine mechanical fault that affects only one cylinder
 
Fuel delivery component fault that affects only one cylinder (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil or plug) that affects one cylinder
 
TSB 00-11-006 (7/00) has information about this code (V6 only)
 

Trouble Code: P0302



Cylinder 2 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine mechanical fault that affects only one cylinder
 
Fuel delivery component fault that affects only one cylinder (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil or plug) that affects one cylinder
 

Trouble Code: P0303



Cylinder 3 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine mechanical fault that affects only one cylinder
 
Fuel delivery component fault that affects only one cylinder (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil or plug) that affects one cylinder
 
TSB 00-11-006 (7/00) has information about this code (V6 only)
 

Trouble Code: P0304



Cylinder 4 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or PCM system
 
Base engine mechanical fault that affects only one cylinder
 
Fuel delivery component fault that affects only one cylinder (i.e., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem (coil or plug) that affects one cylinder
 

Trouble Code: P0325



Knock Sensor 1 Circuit Malfunction

Possible Causes:



Knock sensor signal circuit is open or shorted to ground
 
Knock sensor signal circuit is shorted to VREF or system power
 
Knock sensor is damaged or has failed
 
Verify the Knock Sensor (KS) is tightened its specification
 
PCM has failed
 

Trouble Code: P0335



Crankshaft Position Sensor Circuit Malfunction

Possible Causes:



CKP sensor signal circuit is open or shorted to ground
 
CKP sensor ground circuit is open
 
CKP sensor power circuit is open (check power to MFI relay)
 
CKP sensor is damaged or has failed
 
PCM has failed (the PCM provides the 5v VREF to the sensor)
 

Trouble Code: P0340



Camshaft Position Sensor Circuit Malfunction

Possible Causes:



CMP sensor signal circuit is open or shorted to ground
 
CMP sensor ground circuit is open
 
CMP sensor power circuit is open (check power to MFI relay)
 
CMP sensor is damaged or has failed
 
PCM has failed (the PCM provides the 5v VREF to the sensor)
 

Trouble Code: P0400



Exhaust Gas Recirculation System Flow Malfunction

Possible Causes:



EGR valve source vacuum supply line is open or restricted
 
EGR exhaust tube is clogged or restricted
 
EGR valve assembly is damaged or has failed
 
PCM has failed
 

Trouble Code: P0403



EGR Control Circuit Malfunction

Possible Causes:



EGR solenoid control circuit is open or shorted to ground
 
EGR solenoid power circuit is open (check power from relay)
 
EGR solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0420



Catalyst System Efficiency Low (Bank 1)

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Catalytic converter is damaged, contaminated or has failed
 
Front HO2S or rear HO2S is contaminated with fuel or moisture
 
Front HO2S and/or the rear HO2S is loose in the mounting hole
 
Front HO2S older (aged) than the rear HO2S (HO2S is lazy)
 

Trouble Code: P0421



Warmup Catalyst Efficiency Low (Bank 1)

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Catalytic converter is damaged, contaminated or has failed
 
Front HO2S or rear HO2S is contaminated with fuel or moisture
 
Front HO2S and/or the rear HO2S is loose in the mounting hole
 
Front HO2S older (aged) than the rear HO2S (HO2S is lazy)
 

Trouble Code: P0442



EVAP Control System Small Leak Detected

Possible Causes:



Canister Purge valve is damaged, leaking or it has failed
 
Charcoal canister is loaded with fuel or moisture
 
Fuel filler cap loose, cross-threaded, incorrect part or damaged
 
Fuel tank is cracked (leaking), or a leak exists in the 'O' ring
 
Fuel tank pressure sensor is damaged or has failed
 
Fuel vapor line(s), fuel pipes or hoses damaged or leaking
 
PCM has failed
 

Trouble Code: P0443



EVAP Purge Control Solenoid Circuit Malfunction

Possible Causes:



Purge solenoid circuit control is open or shorted to ground
 
Purge solenoid power circuit is open (test from the relay)
 
Purge control solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0446



EVAP Vent Control Solenoid Circuit Malfunction

Possible Causes:



Vent Control solenoid circuit is open or shorted to ground
 
Vent Control solenoid power circuit is open (test from the relay)
 
Vent Control solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0450



Fuel Tank Pressure Sensor Circuit Malfunction

Possible Causes:



FTP sensor signal circuit open or shorted to ground
 
FTP sensor ground circuit is open
 
FTP sensor power (VREF) circuit is open
 
FTP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0500



Vehicle Speed Sensor Circuit Malfunction

Possible Causes:



VSS signal circuit is open or shorted to ground
 
VSS power circuit is open (check for power from MFI relay)
 
VSS ground circuit is open between sensor and chassis ground
 
VSS is damaged or has failed
 
PCM has failed (the PCM provides 5v on the VSS signal circuit)
 

Trouble Code: P0505



Idle Speed Control System Malfunction

Possible Causes:



Stepper motor Coil A1 or A2 circuit is open or shorted to ground
 
Stepper motor Coil B1 or B2 circuit is open or shorted to ground
 
Stepper motor coil circuit(s) shorted to system power (B+)
 
Stepper motor power circuit is open (check power at MFI relay)
 
Stepper motor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0551



Power Steering Pressure Switch Circuit Malfunction

Possible Causes:



Power steering pressure switch signal circuit is open
 
Power steering pressure switch signal circuit shorted to ground
 
Power steering pressure switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1500



Generator 'FR' Terminal Circuit Malfunction

Possible Causes:



Generator "FR" circuit is open between Generator and the PCM
 
Generator is damaged or has failed
 
PCM has failed
 

 
label.common.footer.alt.autozoneLogo