Mitsubishi Car 1999-05

2.0L L4 - Std 2

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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: P0401



Insufficient EGR Flow Detected

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
 
EGR valve circuit shorted or open
 
MAP sensor 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: 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: P0441



EVAP Emission Control System Incorrect Purge Flow

Possible Causes:



Charcoal canister is damaged, clogged or restricted
 
Purge solenoid circuit is open (fault may be intermittent)
 
Purge solenoid power circuit is open (check the relay or fuse)
 
Purge valve vacuum line is clogged, restricted or disconnected
 
PCM has failed
 

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: P0451



Emission Control System Pressure Sensor Performance

Possible Causes:



Fuel tank pressure sensor vacuum hoses loose or damaged
 
Fuel tank pressure sensor is damaged or out-of-calibration
 
PCM has failed
 

Trouble Code: P0452



Emission Control System Pressure Sensor Circuit Low Input

Possible Causes:



Fuel tank pressure sensor signal circuit is shorted to ground
 
Fuel tank pressure sensor power circuit is open
 
Fuel tank pressure sensor is damaged or out-of-calibration
 
PCM has failed
 

Trouble Code: P0453



Emission Control System Pressure Sensor Circuit High Input

Possible Causes:



Fuel tank pressure sensor signal circuit is shorted to ground
 
Fuel tank pressure sensor power circuit is open
 
Fuel tank pressure sensor is damaged or out-of-calibration
 
PCM has failed
 

Trouble Code: P0455



EVAP Leak Monitor Gross Leak (0.080") Detected

Possible Causes:



Canister vent (CV) solenoid may be stuck in open position
 
EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged
 
EVAP canister purge valve stuck closed, or canister damaged
 
Fuel filler cap missing, loose (not tightened) or the wrong part
 
Fuel vapor hoses/tubes blocked or restricted, or fuel vapor control valve tube or fuel vapor vent valve assembly blocked
 
Fuel tank pressure (FTP) sensor has failed (mechanical fault)
 
Fuel tank control valve is contaminated, damaged or has failed
 

Trouble Code: P0456



EVAP Leak Monitor Very Small Leak (0.020") Detected

Possible Causes:



Canister Vent valve is damaged, leaking or it has failed
 
Fuel filler cap loose, cross-threaded or the incorrect part
 
Fuel tank is cracked (leaking), or a leak exists in the 'O' ring
 
Fuel tank filler tube assembly is damaged or leaking
 
Fuel vapor line(s), fuel pipes or hoses damaged or leaking
 
PCM has failed
 

Trouble Code: P0461



Fuel Level Sensor (Main) Circuit Range/Performance

Possible Causes:



Fuel pump module failed
 
Fuel level sensor failed
 
Fuel level sensor circuit shorted or open
 
PCM has failed
 

Trouble Code: P0500



Vehicle Speed Sensor Circuit Malfunction

Possible Causes:



VSS circuit is open or shorted to ground
 
VSS is damaged or has failed
 
PCM has failed
 

Trouble Code: P0506



Idle Speed Control System Lower Than Expected

Possible Causes:



IAC motor control circuit A1, A2, B1 or B2 is open
 
IAC motor control circuit A1, A2, B1 or B2 is shorted to ground
 
IAC motor is damaged or has failed (it may be dirty or sticking)
 
Throttle plate is carbon fouled (it may need to be cleaned)
 
PCM has failed
 

Trouble Code: P0507



Idle Speed Control System Higher Than Expected

Possible Causes:



IAC motor control circuit A1, A2, B1 or B2 is open
 
IAC motor control circuit A1, A2, B1 or B2 is shorted to ground
 
IAC motor is damaged or has failed (it may be dirty or sticking)
 
Throttle plate is carbon fouled (it may need to be cleaned)
 
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: P0554



Power Steering Pressure Switch Circuit Intermittent

Possible Causes:



Power steering pressure switch circuit is shorted or open
 
Incorrect power steering fluid level or oil pump pressure
 
Power steering pressure switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P0606



PCM Main Processor Malfunction

Possible Causes:



PCM has failed
 

Trouble Code: P0622



Generator FR Terminal Circuit Malfunction

Possible Causes:



Generator failed
 
Generator FR terminal circuit open or shorted
 
PCM has failed
 

Trouble Code: P0638



Throttle Actuator Control Motor Circuit Range/Performance Problem

Possible Causes:



Throttle valve return spring failed
 
Throttle valve operation failed
 
Throttle actuator control motor failed
 
Throttle actuator control motor circuit shorted or open
 
PCM has failed
 

Trouble Code: P0642



Throttle Position Sensor Power Supply

Possible Causes:



PCM has failed
 

Trouble Code: P0657



Throttle Actuator Control Motor Relay Circuit Malfunction

Possible Causes:



Throttle actuator control motor failed
 
Throttle actuator control motor circuit shorted or open
 
PCM has failed
 

Trouble Code: P0830



Clutch Pedal Position Switch Circuit Range/Performance

Possible Causes:



Clutch pedal position switch failed
 
Clutch pedal position switch circuit open or shorted
 
PCM has failed
 

Trouble Code: P1400



Manifold Differential Pressure Sensor Circuit Malfunction

Possible Causes:



MDP sensor signal circuit is open or shorted to ground
 
MDP sensor signal circuit is shorted to VREF or system power
 
MDP sensor 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
 

Trouble Code: P1602



Communication Malfunction (between PCM Main Processor and System LSI)

Possible Causes:



PCM has failed
 

Trouble Code: P1603



Battery Backup Circuit Malfunction

Possible Causes:



Battery backup circuit is open (check the power through the fusible link and Dedicated Fuse No. 7 for an open circuit)
 
Battery terminals corroded, or loose connections
 
PCM has failed
 

Trouble Code: P1610



Immobilizer System Malfunction

Possible Causes:



Immobilizer data circuit to the PCM is open
 
Immobilizer data circuit to the PCM is shorted to ground
 
Immobilizer (controller) is damaged or has failed
 

Trouble Code: P2100



Throttle Actuator Control Motor Circuit Open

Possible Causes:



Throttle actuator control motor failed
 
Throttle actuator control motor circuit open
 
PCM has failed
 

Trouble Code: P2101



Throttle Actuator Control Motor Magneto Malfunction

Possible Causes:



Throttle actuator control motor failed
 
Throttle actuator control motor circuit shorted
 
PCM has failed
 

Trouble Code: P2102



Throttle Actuator Control Motor Circuit Shorted Low

Possible Causes:



Throttle actuator control motor failed
 
Throttle actuator control motor circuit shorted
 
PCM has failed
 

Trouble Code: P2103



Throttle Actuator Control Motor Circuit Shorted High

Possible Causes:



Throttle actuator control motor failed
 
Throttle actuator control motor circuit shorted
 
PCM has failed
 

Trouble Code: P2121



Accelerator Pedal Position Sensor (Main) Circuit Range/Performance Problem

Possible Causes:



Accelerator pedal position sensor misadjusted or failed
 
Accelerator pedal position sensor (main) open or shorted
 
Accelerator pedal position switch misadjusted or failed
 
Accelerator pedal position switch open or shorted
 
PCM has failed
 

 
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