Forenza 2007

2.0L L4 VIN - Auto 4

Print

Trouble Code: P0138



HO2S-12 (Bank 1 Sensor 2) Circuit High Input

Possible Causes:



HO2S signal circuit open (sensor signal reads over 4.5v)
 
HO2S is shorted to ground
 
HO2S signal ground circuit is open
 
HO2S is contaminated or has failed
 
Vehicle driven until it ran out of fuel, or while very low on fuel
 
PCM has failed
 

Trouble Code: P0139



Heated oxygen sensor 2 circuit slow response

Possible Causes:



Harness or connectors
 
(The sensor circuit is open or shorted)
 
Heated oxygen sensor 2
 
Fuel pressure
 
Fuel injector
 
Intake air leaks
 

Trouble Code: P0140



HO2S-12 (Bank 1 Sensor 2) Circuit, No Activity Detected

Possible Causes:



Air leaks in the intake manifold or exhaust manifold or pipes
 
HO2S is contaminated (wrong fuel), has deteriorated or failed
 
HO2S heater element is damaged or has failed
 
PCM has failed
 
TSB TS015 (12/95) contains information related to this code
 

Trouble Code: P0141



HO2S-12 (Bank 1 Sensor2) Heater Circuit Malfunction

Possible Causes:



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

Trouble Code: P0171



Fuel System Too Lean (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 before or near where the front HO2S is mounted
 
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: P0172



Fuel System Too Rich (Bank 1)

Possible Causes:



Base engine "mechanical" fault affecting one or more cylinders
 
EVAP system component has failed or canister fuel saturated
 
Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
 
Fuel delivery system supplying too much fuel during cruise or idle periods (e.g., faulty fuel pump, or faulty pressure regulator)
 
Fuel injector(s) is leaking or stuck partially open (one or more)
 
HO2S is contaminated, deteriorated or it has failed
 

Trouble Code: P0217



Engine Coolant Over Temperature

Possible Causes:



Sensor
 
Circuit
 
ECM
 

Trouble Code: P0222



Throttle Position (TP) Sensor 2 Circuit Low Voltage

Possible Causes:



TP sensor and/or circuit
 
ECM
 

Trouble Code: P0223



Throttle Position (TP) Sensor 2 Circuit High Voltage

Possible Causes:



TP sensor and/or circuit
 
ECM
 

Trouble Code: P0261



Injector 1 Control Circuit Low Voltage

Possible Causes:



Injector and/or circuit
 
ECM
 

Trouble Code: P0262



Injector 1 Control Circuit High Voltage

Possible Causes:



Injector and/or circuit
 
ECM
 

Trouble Code: P0264



Injector 2 Control Circuit Low Voltage

Possible Causes:



Injector and/or circuit
 
ECM
 

Trouble Code: P0265



Injector 2 Control Circuit High Voltage

Possible Causes:



Injector and/or circuit
 
ECM
 

Trouble Code: P0267



Injector 3 Control Circuit Low Voltage

Possible Causes:



Injector and/or circuit
 
ECM
 

Trouble Code: P0268



Injector 3 Control Circuit High Voltage

Possible Causes:



Injector and/or circuit
 
ECM
 

Trouble Code: P0270



Injector 4 Control Circuit Low Voltage

Possible Causes:



Injector and/or circuit
 
ECM
 

Trouble Code: P0271



Injector 4 Control Circuit High Voltage

Possible Causes:



Injector and/or circuit
 
ECM
 

Trouble Code: P0300



Multiple Cylinder 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
 
Fuel delivery component fault that affects one or more cylinders (i.e., one or more contaminated, dirty or sticking fuel injectors)
 
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
 

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
 

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: P0314



Misfire Detected with Camshaft Position (CMP) Sensor Error

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
 
Fuel delivery component fault that affects one or more cylinders (i.e., one or more contaminated, dirty or sticking fuel injectors)
 
Ignition system problem (coil or plug) in one or more cylinders
 

Trouble Code: P0315



Crankshaft Position (CKP) System Variation Not Learned

Possible Causes:



system variation (learn) procedure
 
sensor installation
 

Trouble Code: P0317



Rough Road Sensor Sensing System Input Not Present

Possible Causes:



Sensor
 
ECM
 

Trouble Code: P0324



Knock Control System Error

Possible Causes:



Knock sensor and/or its circuit
 
ECM
 

Trouble Code: P0325



Knock Sensor (KS) Circuit

Possible Causes:



mechanical component loose
 
Sensor
 
Circuit
 
ECM
 

Trouble Code: P0335



Crankshaft Position Sensor Circuit Malfunction

Possible Causes:



CKP sensor positive (+) circuit is open or shorted to ground
 
CKP sensor negative (-) circuit is open or shorted to ground
 
CKP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0336



Crankshaft Position Sensor -A- Circuit Range/Performance

Possible Causes:



CKP sensor and/or its circuit
 
Signal rotor
 
ECM
 

Trouble Code: P0340



Camshaft Position Sensor Circuit Malfunction

Possible Causes:



CMP sensor signal circuit is open between sensor and PCM
 
CMP sensor signal circuit is shorted to ground
 
CMP sensor power circuit is open (check power from the relay)
 
CMP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0351



Ignition Control Circuit A Failed (Cylinders 1 and 4)

Possible Causes:



Circuit is open or shorted to ground
 
Circuit is open (check power from the MFI relay)
 
PCM is damaged or has failed
 

Trouble Code: P0352



Ignition Control Circuit B Failed (Cylinders 2 and 3)

Possible Causes:



Circuit is open or shorted to ground
 
Circuit is open (check power from the MFI relay)
 
PCM is damaged or has failed
 

Trouble Code: P0401



EGR System Fault (Too Much or Too Little Flow)

Possible Causes:



EGR stepper motor control circuit(s) open or shorted to ground
 
EGR stepper motor assembly is damaged or has failed
 
Exhaust connection to EGR valve is clogged or restricted
 
Catalytic converter or exhaust system is clogged or restricted
 
PCM has failed
 

Trouble Code: P0402



EGR System Fault (Too Much or Too Little Flow)

Possible Causes:



EGR stepper motor control circuit(s) open or shorted to ground
 
EGR stepper motor assembly is damaged or has failed
 
Exhaust connection to EGR valve is clogged or restricted
 
Catalytic converter or exhaust system is clogged or restricted
 
PCM has failed
 

Trouble Code: P0403



Exhaust gas recirculation control circuit

Possible Causes:



EGR
 
Circuit
 
ECM
 

Trouble Code: P0404



Exhaust Gas Recirculation Open Valve Position Error

Possible Causes:



EGR stepper motor control circuit(s) open or shorted to ground
 
EGR stepper motor assembly is damaged or has failed
 
Exhaust connection to EGR valve is clogged or restricted
 
Catalytic converter or exhaust system is clogged or restricted
 
PCM has failed
 

Trouble Code: P0405



Exhaust Gas Recirculation Pintle Position Low Voltage

Possible Causes:



EGR stepper motor control circuit(s) open or shorted to ground
 
EGR stepper motor assembly is damaged or has failed
 
Exhaust connection to EGR valve is clogged or restricted
 
Catalytic converter or exhaust system is clogged or restricted
 
PCM has failed
 

Trouble Code: P0406



Exhaust Gas Recirculation Pintle Position High Voltage

Possible Causes:



EGR stepper motor control circuit(s) open or shorted to ground
 
EGR stepper motor assembly is damaged or has failed
 
Exhaust connection to EGR valve is clogged or restricted
 
Catalytic converter or exhaust system is clogged or restricted
 
PCM has failed
 

Trouble Code: P0420



Catalyst Efficiency Below Normal (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 is older (aged) than the rear HO2S (HO2S is lazy)
 

Trouble Code: P042E



Exhaust Gas Recirculation (EGR) Closed Position Performance

Possible Causes:



Sensor
 
Circuit
 
ECM
 
EGR Valve
 

 
label.common.footer.alt.autozoneLogo