Forenza 2007

2.0L L4 VIN - Std 3

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Trouble Code: C0121



Valve Relay Circuit Malfunction

Possible Causes:



A connector terminal is corroded.
 
The wiring harness is damaged.
 
The ground terminal is not conducting properly.
 
The EBCM is defective.
 

Trouble Code: C0161



ABS Brake Switch Circuit Malfunction

Possible Causes:



The ground connection or the positive connection at the EBCM has failed.
 
There is an open, short to ground, or short to positive in the vehicle wiring.
 
The brake light switch has failed.
 

Trouble Code: C0550



TPMS Input Failure of Vehicle Speed

Possible Causes:



Circuit
 
TPMS Receiver Module
 

Trouble Code: C0550



EBCM Internal Fault

Possible Causes:



A connector terminal is corroded.
 
The EBCM is malfunctioning.
 

Trouble Code: C0551



TPMS EEPROM Failure

Possible Causes:



TPMS Receiver Module
 

Trouble Code: C0750



TPMS Battery Voltage Problem 1

Possible Causes:



TPMS Transmitter
 

Trouble Code: C0751



TPMS Reception Failure 1

Possible Causes:



TPMS Transmitter
 
Receiver Modul
 

Trouble Code: C0755



TPMS Battery Voltage Problem 2

Possible Causes:



TPMS Transmitter
 

Trouble Code: C0756



TPMS Reception Failure 2

Possible Causes:



TPMS Transmitter
 
Receiver Module
 

Trouble Code: C0760



TPMS Battery Voltage Problem 3

Possible Causes:



TPMS Transmitter
 

Trouble Code: C0761



TPMS Reception Failure 3

Possible Causes:



TPMS Transmitter
 
Receiver Module
 

Trouble Code: C0765



TPMS Battery Voltage Problem 4

Possible Causes:



TPMS Transmitter
 

Trouble Code: C0766



TPMS Reception Failure 4

Possible Causes:



TPMS Transmitter
 
Receiver Module
 

Trouble Code: C0775



TPMS Air Pressure Warning 1

Possible Causes:



Inflate tire to 30 PSI
 

Trouble Code: C0776



TPMS Air Pressure Warning 2

Possible Causes:



Inflate tire to 30 PSI
 

Trouble Code: C0777



TPMS Air Pressure Warning 3

Possible Causes:



Inflate tire to 30 PSI
 

Trouble Code: C0778



TPMS Air Pressure Warning 4

Possible Causes:



Inflate tire to 30 PSI
 

Trouble Code: C0779



TPMS Unregistered ID Code

Possible Causes:



Preform TPS ID Registration Procedure
 

Trouble Code: C0800



ABS Low Voltage Fault

Possible Causes:



The battery is defective.
 
There is a defective ground connection.
 
A connector is damaged.
 
A wire is broken or shorted.
 
A fuse is blown.
 
The ignition switch is malfunctioning.
 

Trouble Code: P0016



Crankshaft Position-Camshaft Position Correlation

Possible Causes:



CKP sensor and/or its circuit
 
CMP sensor and/or its circuit
 
Sensor plate
 
Signal rotor
 
Valve timing
 
ECM
 

Trouble Code: P0031



Air Fuel Ratio (A/F) Sensor 1, (heater control circuit low)

Possible Causes:



Harness or connectors (The A/F sensor 1 heater circuit is open or shorted.)
 
Air fuel ratio (A/F) sensor 1 heater
 

Trouble Code: P0032



Air fuel Ratio (A/F) Sensor 1, (heater control circuit high)

Possible Causes:



Harness or connectors (The A/F sensor 1 heater circuit is shorted.)
 
Air fuel ratio (A/F) sensor 1 heater
 

Trouble Code: P0037



HO2S-12 (Bank 1 Sensor 2) Heater Circuit Low Input

Possible Causes:



Harness or connectors (The heated oxygen sensor 2 heater circuit is open or shorted.)
 
Heated oxygen sensor 2 heater
 

Trouble Code: P0038



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

Possible Causes:



HO2S signal circuit is open or shorted to system power
 
Fuel supply system is too rich (fuel injector or regulator leaking)
 
HO2S is contaminated, damaged or has failed
 
PCM has failed
 
TSB TS015 (12/95) contains information related to this code
 

Trouble Code: P0068



Throttle Body Airflow Performance

Possible Causes:



Vacuum leaks
 
Throttle body
 

Trouble Code: P0107



Manifold Absolute Pressure (MAP) Circuit Low Input

Possible Causes:



-Lg- circuit open or shorted to ground
 
-Or/G- circuit shorted to ground
 
MAP sensor malfunction
 
ECM malfunction
 

Trouble Code: P0110



Intake Air Temperature (IAT) Sensor Circuit

Possible Causes:



Sensor
 
Circuit
 
ECM
 

Trouble Code: P0111



Intake Air Temperature (IAT) Circuit Range / Performance Problem

Possible Causes:



High resistance in the circuit
 
IAT sensor malfunction
 
ECM malformation
 

Trouble Code: P0116



Engine Coolant Temperature (ECT) Circuit Range / Performance Problem

Possible Causes:



ECT sensor
 
ECT sensor circuit
 
Thermostat
 
ECM (PCM)
 

Trouble Code: P0118



Engine Coolant Temperature (ECT) Circuit High Input

Possible Causes:



-Gr/W- circuit open or shorted to power
 
-Lg/B- circuit open
 
ECT sensor malfunction
 
ECM malfunction
 

Trouble Code: P0122



Throttle Position (TP) Sensor 1 Circuit Low Voltage

Possible Causes:



TP sensor and/or circuit
 
ECM
 

Trouble Code: P0123



Throttle Position (TP) Sensor 1 Circuit High Voltage

Possible Causes:



TP sensor and/or circuit
 
ECM
 

Trouble Code: P0125



Insufficient Coolant Temperature For Closed Loop

Possible Causes:



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

Trouble Code: P0128



Coolant Temperature Below Thermostat Regulating Temperature

Possible Causes:



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

Trouble Code: P0131



HO2S-11 (Bank 1 Sensor 1) Circuit Low Input

Possible Causes:



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: P0132



HO2S-11 (Bank 1 Sensor 1) Circuit High Input

Possible Causes:



HO2S signal circuit is open or shorted to system power
 
Fuel supply system is too rich (fuel injector or regulator leaking)
 
HO2S is contaminated, damaged or has failed
 
PCM has failed
 
TSB TS015 (12/95) contains information related to this code
 

Trouble Code: P0133



HO2S-11 (Bank 1 Sensor 1) Slow Response

Possible Causes:



Air leaks in the intake manifold or exhaust manifold or pipes
 
IAT sensor or MAF sensor has deteriorated (out of calibration)
 
HO2S signal circuit is open or shorted to ground (intermittent)
 
HO2S contaminated with wrong fuel, has deteriorated or failed
 
PCM has failed
 
TSB TS015 (12/95) contains information related to this code
 

Trouble Code: P0134



HO2S-11 (Bank 1 Sensor 1) 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: P0135



HO2S-11 (Bank 1 Sensor 1) 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: P0137



HO2S-12 (Bank 1 Sensor 2) Circuit Low 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
 

 
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