Pacifica 2006-2008

4.0L V6 VIN X Auto 3

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Trouble Code: P0304



Cylinder 1-6 Misfire Detected

Possible Causes:



Intermittent misfire
 
Base engine mechanical fault that affects only 1 cylinder
 
Ignition wiring, coil control circuit or coil fault
 
ASD relay output circuit (coil or injector) problem
 
Spark plug malfunction or failure on 1 cylinder
 
CMP Sensor, Sensor wiring harness or tone wheel is damaged
 
Fuel delivery component fault that affects only 1 cylinder (e.g., a dirty fuel injector)
 
Injector or control circuit failure
 
PCM has failed
 

Trouble Code: P0305



Cylinder 1-6 Misfire Detected

Possible Causes:



Intermittent misfire
 
Base engine mechanical fault that affects only 1 cylinder
 
Ignition wiring, coil control circuit or coil fault
 
ASD relay output circuit (coil or injector) problem
 
Spark plug malfunction or failure on 1 cylinder
 
CMP Sensor, Sensor wiring harness or tone wheel is damaged
 
Fuel delivery component fault that affects only 1 cylinder (e.g., a dirty fuel injector)
 
Injector or control circuit failure
 
PCM has failed
 

Trouble Code: P0306



Cylinder 1-6 Misfire Detected

Possible Causes:



Intermittent misfire
 
Base engine mechanical fault that affects only 1 cylinder
 
Ignition wiring, coil control circuit or coil fault
 
ASD relay output circuit (coil or injector) problem
 
Spark plug malfunction or failure on 1 cylinder
 
CMP Sensor, Sensor wiring harness or tone wheel is damaged
 
Fuel delivery component fault that affects only 1 cylinder (e.g., a dirty fuel injector)
 
Injector or control circuit failure
 
PCM has failed
 

Trouble Code: P0315



No Crankshaft Position Sensor Learned

Possible Causes:



Crankshaft tone wheel flex plate is damaged
 
Tone wheel/pulse ring may be damaged
 
Erratic CKP Sensor signals (wiring/connector problem)
 
CKP Sensor has failed
 
PCM has failed
 

Trouble Code: P0325



Knock Sensor No. 1 Circuit

Possible Causes:



Knock Sensor connector is damaged or shorted
 
Knock Sensor signal circuit open or grounded
 
Knock Sensor signal circuit shorted to return circuit
 
Knock Sensor return circuit is open
 
Knock Sensor not tightened properly
 
Knock Sensor damaged or has failed (it may be open internally)
 
PCM has failed
 

Trouble Code: P0330



Knock Sensor No. 2 Circuit

Possible Causes:



Knock Sensor No. 2 signal circuit shorted to battery voltage or to KS 2 return circuit
 
Knock Sensor No. 2 signal circuit or return circuit is open
 
Knock Sensor No. 2 signal circuit is shorted to KS 2 return circuit or to ground
 
Knock Sensor damaged or has failed
 
PCM has failed
 

Trouble Code: P0335



Crankshaft Position Sensor Circuit

Possible Causes:



Intermittent CKP signal
 
CKP Sensor signal circuit is open or it is shorted to ground or voltage
 
CKP Sensor 5V supply circuit is open or shorted to ground or voltage
 
CKP Sensor ground circuit is open
 
CKP Sensor or CMP Sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0339



Crankshaft Position Sensor Circuit Intermittent

Possible Causes:



Check the tone wheel/pulse ring for damage or debris collection
 
CKP Sensor signal circuit is open or shorted to ground
 
CKP Sensor 5V supply circuit is open or shorted to ground
 
CKP Sensor is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0340



No Camshaft Position Sensor Circuit Failure

Possible Causes:



CMP Sensor connector is damaged, open or it is shorted
 
CMP Sensor signal circuit is open or shorted to ground or to battery voltage or 5V supply circuit
 
CMP Sensor 5V supply circuit is open or shorted to ground or to battery voltage
 
CMP Sensor ground circuit is open
 
CMP Sensor is damaged or has failed
 
CKP Sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0344



Camshaft Position Sensor Circuit Intermittent

Possible Causes:



Wiring harness fault
 
5V supply circuit open or shorted to ground
 
Tone wheel/pulse ring is damaged or corroded
 
CMP Sensor has failed
 
CMP Sensor signal circuit is open, shorted to ground or battery voltage or 5V supply
 
CMP Sensor ground circuit is open
 
PCM has failed
 

Trouble Code: P0401



EGR System Fault

Possible Causes:



EGR valve is open at idle
 
EGR solenoid ground circuit is open
 
EGR solenoid control circuit is open, shorted to ground or to voltage
 
ASD relay power circuit open to the EGR solenoid
 
EGR valve or solenoid is damaged or has failed
 
PCM has failed (EGR open or EGR closed)
 

Trouble Code: P0403



EGR Solenoid Circuit

Possible Causes:



EGR solenoid ground circuit is open
 
EGR solenoid control circuit is open or shorted to ground or to voltage
 
EGR solenoid power circuit is open
 
EGR solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0404



EGR Position Sensor Signal Performance

Possible Causes:



EGR Sensor signal circuit is open or shorted to ground
 
EGR Sensor 5V supply circuit is open or has high resistance
 
EGR Sensor ground circuit is open
 
EGR solenoid control circuit has a problem
 
EGR valve actuator loose, sticking, blocked or improperly grounded
 
EGR Sensor is damaged or has failed
 
Intermittent condition
 
PCM has failed
 

Trouble Code: P0405



EGR Position Sensor Circuit Low Input

Possible Causes:



EGR Sensor signal circuit is shorted to ground or open
 
EGR Sensor VREF (5V) circuit is open or shorted to ground
 
EGR Sensor is damaged (shorted internally) or it has failed
 
EGR position internal failure
 
PCM has failed
 

Trouble Code: P0406



EGR Position Sensor Circuit High Input

Possible Causes:



Intermittent condition
 
EGR Sensor signal is shorted to VREF (5V) supply circuit or to battery voltage
 
EGR Sensor ground circuit is open
 
EGR Sensor signal circuit is open
 
EGR Sensor is damaged (it may have an internal open circuit)
 
EGR solenoid failure
 
PCM has failed
 

Trouble Code: P0420



Catalyst Efficiency Below Normal (Bank 1)

Possible Causes:



Air leaks in at the exhaust manifold or exhaust pipes
 
Base engine problems (high coolant or engine oil consumption)
 
Catalytic converter damaged or has failed
 
FronT O2S1 older (aged) than the rear O2 (O2 is lazy)
 

Trouble Code: P0430



Catalyst (2/1) Efficiency Below Normal

Possible Causes:



Exhaust leaks
 
Base engine problems
 
Catalytic converter damaged or has failed
 
FronT O2S1 older (aged) than the rear O2 (O2 is lazy)
 

Trouble Code: P0432



Catalyst Efficiency Below Normal (Bank 2)

Possible Causes:



Air leaks in at the exhaust manifold or exhaust pipes
 
Base engine problems (high coolant or engine oil consumption)
 
Catalytic converter damaged or has failed
 
FronT O2S1 older (aged) than the rear O2 (O2 is lazy)
 

Trouble Code: P0440



EVAP Purge System Fault

Possible Causes:



EVAP purge valve vacuum supply is leaking or clogged
 
EVAP purge valve is stuck closed
 
EVAP purge solenoid has failed
 
NVLD assembly (leak detection) is damaged or has failed
 
NVLD switch circuit is open or the NVLD switch has failed
 
Ground circuit is open
 
PCM has failed
 

Trouble Code: P0441



EVAP Purge System Performance

Possible Causes:



Intermittent condition
 
EVAP purge solenoid functioning improperly
 
EVAP purge solenoid vacuum supply leaking or clogged
 

Trouble Code: P0442



EVAP System Medium Leak Detected

Possible Causes:



Intermittent condition
 
Vacuum hoses, connections or switches have come loose or malfunctioned
 
EVAP emission system has a leak
 
EVAP purge solenoid operation has malfunctioned
 
NVLD switch operation has malfunctioned
 

Trouble Code: P0443



EVAP Purge Solenoid Circuit Fault

Possible Causes:



EVAP purge solenoid control circuit open or shorted to ground
 
EVAP purge solenoid return circuit open or shorted to ground
 
EVAP purge solenoid is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0445



EVAP System Large Leak Detected

Possible Causes:



Intermittent condition
 
Vacuum hoses, connections or switches have come loose or malfunctioned
 
EVAP emission system has a leak
 
EVAP purge solenoid operation has malfunctioned
 
NVLD switch operation has malfunctioned
 

Trouble Code: P0452



NVLD Pressure Switch Sense Circuit Low Input

Possible Causes:



EVAP purge solenoid control circuit is shorted to ground
 
EVAP purge solenoid is leaking or it is stuck in open position
 
NVLD assembly or NVLD switch is damaged or it has failed
 
NVLD switch signal circuit is shorted to ground
 
PCM has failed
 

Trouble Code: P0453



NVLD Pressure Switch Sense Circuit High Input

Possible Causes:



NVLD assembly ground circuit is open
 
NVLD switch signal circuit is open or shorted to power (B+) or to NVLD solenoid control circuit
 
NVLD assembly or switch is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0455



EVAP Large Leak Detected

Possible Causes:



EVAP purge solenoid is damaged or it has failed
 
Fuel tank cap is damaged, missing or the wrong part number
 
NVLD switch is damaged or it has failed
 

Trouble Code: P0456



EVAP System Small Leak Detected

Possible Causes:



Fuel tank cap is damaged, loose or the wrong part number
 
Small leak present somewhere in the EVAP system
 

Trouble Code: P0457



Loose Fuel Cap Condition:

Possible Causes:



Loose or missing fuel fill cap
 
Intermittent condition
 
NVLD system or switch malfunction
 
EVAP system leaking
 
EVAP purge solenoid malfunction
 

Trouble Code: P0462



Fuel Level Sensor No. 1 Low Input

Possible Causes:



Intermittent condition
 
Fuel level sending unit signal circuit shorted to Sensor or chassis ground
 
Fuel level sensing unit is damaged or the fuel tank is damaged
 
Instrument cluster problem
 

Trouble Code: P0463



Fuel Level Sensor No. 1 High Input

Possible Causes:



Fuel level sending unit signal circuit is open or is shorted to battery voltage
 
Fuel level Sensor ground circuit is open
 
Fuel level Sensor is damaged or the fuel tank is damaged
 
Instrument cluster is faulty
 
BCM or PCM has failed
 

Trouble Code: P0480



Low Speed (No.1) Fan Control Relay Circuit

Possible Causes:



Fan relay intermittent condition
 
Ground circuit is open
 
Fused B+ output circuit malfunction
 
Fan relay control circuit is open or shorted to battery voltage or ground
 
Fan relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P0481



High Speed (No. 2) Fan Relay Control Circuit

Possible Causes:



HFAN relay power circuit is open from the relay to fused power
 
HFAN relay control circuit is open or shorted to chassis ground
 
Fan relay(s) failed
 
PCM has failed.
 

Trouble Code: P0498



NVLD Canister Vent Solenoid Circuit Low

Possible Causes:



NVLD canister vent solenoid control circuit is shorted to ground
 
NVLD canister vent solenoid is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0499



NVLD Canister Vent Solenoid Circuit High

Possible Causes:



NVLD canister vent solenoid control circuit is open or is shorted to power
 
NVLD canister vent solenoid ground circuit is open
 
NVLD canister vent solenoid is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0501



Vehicle Speed Sensor Performance

Possible Causes:



Check for any ABS/RWAL or TCM codes related to the VSS
 
VSS connector is damaged, open or it is shorted
 
VSS signal is open, shorted to ground or shorted to power
 
Incorrect tire circumference
 
ABS/RWAL controller, BCM, ECM, TCM or PCM has failed
 

Trouble Code: P0503



Vehicle Speed Sensor No. 1 Erratic Performance

Possible Causes:



Check for active Bus or Communication DTCs
 
Incorrect Tire Circumference
 
PCM has failed
 

Trouble Code: P0506



Idle Speed Low Performance

Possible Causes:



PCV system malfunction
 
Air induction system restrictions (clogged air filter, etc.)
 
Idle air control passage is clogged or dirty (clean and retest)
 
Air induction system malfunction
 
Throttle body or linkage is binding, damaged or sticking
 

Trouble Code: P0507



Idle Speed High Performance

Possible Causes:



PCV system malfunction
 
Air induction system restrictions (clogged air filter, etc.)
 
Idle air control passage is clogged or dirty (clean and retest)
 
Air induction system malfunction
 
Throttle body or linkage is binding, damaged or sticking
 

Trouble Code: P0508



Idle Air Control Motor Sense Circuit Low Input

Possible Causes:



IAC motor driver circuit is open or shorted to ground
 
IAC motor sense circuit is open or shorted to ground
 
IAC motor is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0509



Idle Air Control Motor Circuit High

Possible Causes:



IAC motor driver circuit is shorted to power
 
IAC motor sense circuit is shorted to power
 
IAC motor is damaged or it has failed
 
PCM has failed
 

 
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