Forenza 2007

2.0L L4 VIN - Std 5

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Trouble Code: P0442



EVAP System Leak Detected (small leak)

Possible Causes:



Canister air valve (solenoid) is damaged or has failed
 
Charcoal canister is clogged, loaded with fuel or moisture
 
Fuel filler cap loose, cross-threaded, incorrect part or damaged
 
Fuel tank pressure sensor is damaged or has failed
 
Fuel tank or fuel tank sender assembly 'O' ring is leaking
 
Fuel tank vapor line(s) blocked, damaged or disconnected
 
Tank pressure control solenoid is contaminated or damaged
 
Purge solenoid control circuit is open or shorted to ground
 
Purge solenoid power circuit is open (test FI fuse in relay box)
 
Purge solenoid is contaminated, damaged or has failed
 
PCM has failed
 

Trouble Code: P0446



Evaporative Emissions (EVAP) Vent System Performance

Possible Causes:



Leak in EVAP system
 

Trouble Code: P0451



EVAP Pressure Sensor Performance

Possible Causes:



Pressure sensor signal circuit is open or shorted to ground
 
Pressure sensor signal is shorted to VREF or system power
 
Pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0452



EVAP Pressure Sensor Low Input

Possible Causes:



Pressure sensor signal circuit is open or shorted to ground
 
Pressure sensor signal is shorted to VREF or system power
 
Pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0453



EVAP Pressure Sensor High Input

Possible Causes:



Pressure sensor signal circuit is open or shorted to ground
 
Pressure sensor signal is shorted to VREF or system power
 
Pressure sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0454



Fuel Tank Pressure (FTP) Sensor Circuit Intermittent

Possible Causes:



Sensor
 
Circuit
 
ECM
 

Trouble Code: P0455



EVAP System Large Leak (0.080") Detected

Possible Causes:



Canister vent (CV) solenoid is stuck open
 
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 System Small Leak (0.080") Detected

Possible Causes:



Canister vent (CV) solenoid is stuck open
 
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: P0458



Evaporative Emission System Purge Control Valve Circuit Low

Possible Causes:



EVAP canister purge valve and/or its circuit
 
ECM
 

Trouble Code: P0459



Evaporative Emission System Purge Control Valve Circuit High

Possible Causes:



EVAP canister purge valve and/or its circuit
 
ECM
 

Trouble Code: P0461



Fuel Level Sensor Circuit Range / Performance

Possible Causes:



Fuel tank empty or overfull (fuel sender is stuck mechanically)
 
Wrong fuel gauge is installed, or instrument panel is damaged
 
Fuel gauge sender unit is damaged or has failed
 
PCM has failed
 

Trouble Code: P0462



Fuel Level Sensor Circuit Low Input

Possible Causes:



Fuel level signal circuit is open between the splice and the I/P
 
Wrong fuel gauge is installed, or instrument panel is damaged
 
Fuel gauge sender unit is damaged or has failed
 
PCM has failed
 

Trouble Code: P0463



Fuel Level Sensor Circuit High Input

Possible Causes:



Fuel level signal circuit is open between the splice and the I/P
 
Wrong fuel gauge is installed, or instrument panel is damaged
 
Fuel gauge sender unit is damaged or has failed
 
PCM has failed
 

Trouble Code: P0464



Fuel Level Sensor Circuit Intermittent

Possible Causes:



Fuel level signal circuit is open between the splice and the I/P
 
Wrong fuel gauge is installed, or instrument panel is damaged
 
Fuel gauge sender unit is damaged or has failed
 
PCM has failed
 

Trouble Code: P0480



Fan 1 Control Circuit

Possible Causes:



Radiator cooling fan relay No.1 (coil side) and/or its circuit
 
ECM
 

Trouble Code: P0481



Fan 2 Control Circuit

Possible Causes:



Radiator cooling fan relay No.2 (coil side) and/or its circuit
 
ECM
 

Trouble Code: P0496



Evaporative Emissions (EVAP) System Continuous Purge Flow

Possible Causes:



FTP sensor
 
EVAP purge solenoid valve
 

Trouble Code: P0498



Evaporative Emission System Vent Valve Control Circuit Low

Possible Causes:



EVAP canister vent solenoid valve and/or its circuit
 
ECM
 

Trouble Code: P0499



Evaporative Emission System Vent Valve Control Circuit High

Possible Causes:



EVAP canister vent solenoid valve and/or its circuit
 
ECM
 

Trouble Code: P0504



Brake Switch -A-/-B- Correlation

Possible Causes:



Brake light switch and/or circuit
 
brake pedal position switch and/or circuit
 
ECM
 

Trouble Code: P0506



Idle Speed Control System Lower Than Expected

Possible Causes:



IAC valve control circuit is open or shorted to ground
 
IAC valve power circuit is open (intermittent fault)
 
IAC valve ground circuit is open (intermittent fault)
 
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 valve control circuit is open (intermittent fault)
 
IAC valve power circuit is open (intermittent fault)
 
IAC valve ground circuit is open (intermittent fault)
 
Throttle plate is carbon fouled (it may need to be cleaned)
 
PCM has failed
 

Trouble Code: P050B



Cold Start Ignition Timing Performance

Possible Causes:



Air intake system
 
PCV valve and/or hose
 
Exhaust system
 
Throttle body assembly and/or its circuit
 
ECT sensor and/or its circuit
 
Ignition system
 
EVAP system
 
Engine compression
 
Engine vacuum
 
Valve clearance
 
Valve timing
 
ECM
 

Trouble Code: P0532



A/C Pressure Sensor Circuit Low Voltage

Possible Causes:



Sensor signal circuit is open or shorted to ground
 
Sensor ground circuit is open
 
Sensor is damaged or has failed (drive gear may be damaged)
 
PCM has failed
 

Trouble Code: P0533



A/C Pressure Sensor Circuit High Voltage

Possible Causes:



Sensor signal circuit is open or shorted to ground
 
Sensor ground circuit is open
 
Sensor is damaged or has failed (drive gear may be damaged)
 
PCM has failed
 

Trouble Code: P0562



System Voltage Too Low (Engine Side)

Possible Causes:



There is a signal circuit open or shorted to ground
 
There is a ground circuit is open
 
Check the battery voltage
 
PCM has failed
 

Trouble Code: P0563



System Voltage Too High (Engine Side)

Possible Causes:



There is a signal circuit open or shorted to ground
 
There is a ground circuit is open
 
Check the battery voltage
 
PCM has failed
 

Trouble Code: P0564



Cruise Control Multi-Function Switch Circuit

Possible Causes:



Switch
 
Circuit
 
ECM
 

Trouble Code: P0565



Cruise Control Switch Circuit

Possible Causes:



Switch
 
Circuit
 
ECM
 

Trouble Code: P0567



Cruise Control Resume Switch Circuit

Possible Causes:



Switch
 
Circuit
 
ECM
 

Trouble Code: P0568



Cruise Control Set Switch Circuit

Possible Causes:



Switch
 
Circuit
 
ECM
 

Trouble Code: P0571



Brake Switch Circuit

Possible Causes:



Switch
 
Circuit
 
ECM
 

Trouble Code: P0641



Sensor Reference Voltage -A- Circuit/Open

Possible Causes:



A/C refrigerant pressure sensor and/or its circuit
 
APP sensor (main) and/or its circuit
 
CKP sensor and/or its circuit
 
Fuel tank pressure sensor
 
ECM
 

Trouble Code: P0646



A/C Clutch Relay Control Circuit Low

Possible Causes:



A/C compressor relay (coil side) and/or its circuit
 
ECM
 

Trouble Code: P0647



A/C Clutch Relay Control Circuit High

Possible Causes:



A/C compressor relay (coil side) and/or its circuit
 
ECM
 

Trouble Code: P0650



Malfunction Indicator Lamp (MIL) Control Circuit

Possible Causes:



MIL bulb and/or circuit
 
ECM
 

Trouble Code: P0651



Sensor Reference Voltage -B- Circuit/Open

Possible Causes:



CMP sensor and/or its circuit
 
ECM
 

Trouble Code: P0685



Engine Controls Ignition Relay Control Circuit

Possible Causes:



Fuse
 
Powertrain relay and/or circuit
 
ECM
 

Trouble Code: P0834



Clutch Pedal Switch Circuit Low Voltage

Possible Causes:



Switch
 
Circuit
 
ECM
 

Trouble Code: P0835



Clutch Pedal Switch Circuit High Voltage

Possible Causes:



Switch
 
Circuit
 
ECM
 

 
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