Ford Excursion, Expedition, Lincoln Navigator 2000-2005

5.4L V8 VIN R Auto 1

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5.4L V8 VIN R Auto

Trouble Code: P0010



Variable Cam Timing Solenoid 'A' Circuit Malfunction

Possible Causes:



VCT 'A' solenoid connector is damaged, loose or shorted
 
VCT 'A' solenoid control circuit is open, shorted to ground or shorted to power
 
VCT 'A' solenoid is damaged or the PCM has failed
 

Trouble Code: P0011



Variable Cam Timing Over Advanced (Bank 1)

Possible Causes:



Camshaft timing improperly set, or continuous oil flow to the VCT piston chamber
 
Camshaft advance mechanism (the VCT unit) is sticking or binding mechanically
 
VCT solenoid valve is stuck in open position
 

Trouble Code: P0012



Intake Camshaft Position Timing - Over-Retarded (Bank 1)

Possible Causes:



Camshaft timing improperly set
 
Continuous oil flow to the VCT piston chamber
 
VCT solenoid valve stuck open
 
Camshaft advance mechanism binding (VCT unit)
 

Trouble Code: P0013



Variable Cam Timing Over Advanced (Bank 2)

Possible Causes:



Camshaft timing improperly set, or continuous oil flow to the VCT piston chamber
 
Camshaft advance mechanism (the VCT unit) is sticking or binding mechanically
 
VCT solenoid valve is stuck in open position
 

Trouble Code: P0018



Crankshaft Position - Camshaft Position Correlation - Bank 2 Sensor A

Possible Causes:



Camshaft timing incorrectly set
 
VCT solenoid stuck in position
 
Camshaft advance mechanism binding (VCT unit)
 

Trouble Code: P0020



Variable Cam Timing Solenoid 'B' Circuit Malfunction

Possible Causes:



VCT 'B' solenoid connector is damaged, loose or shorted
 
VCT 'B' solenoid control circuit is open, shorted to ground or shorted to power
 
VCT 'B' solenoid is damaged or the PCM has failed
 

Trouble Code: P0021



Variable Cam Timing Over Advanced (Bank 2)

Possible Causes:



Camshaft timing improperly set, or continuous oil flow to the VCT piston chamber
 
Camshaft advance mechanism (the VCT unit) is sticking or binding mechanically
 
VCT solenoid valve is stuck in open position
 

Trouble Code: P0022



Variable Cam Timing Over Retarded (Bank 2)

Possible Causes:



Camshaft timing improperly set, or continuous oil flow to the VCT piston chamber
 
Camshaft advance mechanism (the VCT unit) is sticking or binding mechanically
 
VCT solenoid valve is stuck in open position
 

Trouble Code: P0053



HO2S Heater Resistance (Bank 1, Sensor 3)

Possible Causes:



VPWR circuit open
 
HO2S heater circuit open
 
HO2S heater circuit short in the harness
 
Damaged HO2S heater
 

Trouble Code: P0055



HO2S Heater Resistance (Bank 1, Sensor 3)

Possible Causes:



VPWR circuit open
 
HO2S heater circuit open
 
HO2S heater circuit short in the harness
 
Damaged HO2S heater
 

Trouble Code: P0059



HO2S Heater Resistance (Bank 2, Sensor 1)

Possible Causes:



VPWR circuit open
 
HO2S heater circuit open
 
HO2S heater circuit short in the harness
 
Damaged HO2S heater
 

Trouble Code: P0060



HO2S Heater Resistance (Bank 2, Sensor 2)

Possible Causes:



VPWR circuit open
 
HO2S heater circuit open
 
HO2S heater circuit short in the harness
 
Damaged HO2S heater
 

Trouble Code: P0068



MAP/MAF - Throttle Position

Possible Causes:



Air leak between MAF sensor and throttle body
 
TP sensor not seated properly
 
Damaged TP sensor
 
Damaged MAF sensor
 

Trouble Code: P0102



MAF Sensor Circuit Low Input

Possible Causes:



Check for leaks at air outlet tube
 
Sensor power circuit open, sensor ground circuit open
 
Sensor signal circuit open (may be disconnected)
 
Check for loose tube clamps near the MAF sensor
 

Trouble Code: P0103



MAF Sensor Circuit High Input

Possible Causes:



Check for a restricted inlet screen on the MAF sensor.
 
MAF sensor signal circuit is shorted to system power (B+)
 
MAF sensor is damaged or the PCM has failed
 

Trouble Code: P0112



Intake Air Temperature Sensor Circuit Low Input

Possible Causes:



IAT sensor signal circuit is grounded (check wiring & connector)
 
IAT sensor is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0113



Intake Air Temperature Sensor Circuit High Input

Possible Causes:



IAT sensor signal circuit is open (inspect wiring & connector)
 
IAT sensor signal circuit is shorted to VREF (5v)
 
IAT sensor is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0117



ECT Sensor Circuit Low Input

Possible Causes:



ECT sensor signal circuit is grounded in the wiring harness
 
ECT sensor is damaged or the PCM has failed
 

Trouble Code: P0118



ECT Sensor Circuit High Input

Possible Causes:



ECT sensor signal circuit is open (inspect wiring & connector)
 
ECT sensor signal circuit is shorted to VREF (5v)
 
ECT sensor is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0121



TP Sensor Signal Range/Performance

Possible Causes:



Throttle plate is binding, dirty or sticking
 
TP sensor signal circuit open (inspect wiring & connector)
 
TP sensor ground circuit open (inspect wiring & connector)
 
TP Sensor is damaged or has failed
 

Trouble Code: P0122



TP Sensor Circuit Low Input

Possible Causes:



TP sensor signal circuit open (inspect wiring & connector)
 
TP sensor signal shorted to ground (inspect wiring & connector)
 
TP sensor VREF circuit is open (between the sensor and PCM)
 
TP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0123



TP Sensor Circuit High Input

Possible Causes:



TP sensor not seated correctly in housing (may be damaged)
 
TP sensor signal is circuit shorted to VREF or system voltage
 
TP sensor ground circuit is open (check the wiring harness)
 
Perform a "sensor sweep test" and monitor for any glitches
 
PCM has failed
 

Trouble Code: P0125



Insufficient Coolant Temperature For Closed Loop

Possible Causes:



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

Trouble Code: P0126



Insufficient Coolant Temperature For Closed Loop

Possible Causes:



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

Trouble Code: P0131



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

Possible Causes:



HO2S connector pins damaged
 
Loose circuit connections (including harness connectors)
 
PCM has failed
 

Trouble Code: P0132



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

Possible Causes:



HO2S signal shorted to heater power circuit inside connector
 
HO2S signal circuit shorted to VREF or to system voltage
 
PCM has failed
 

Trouble Code: P0133



HO2S-11 Circuit Slow Response (Bank 1, Sensor 1)

Possible Causes:



Contaminated HO2S* Exhaust leaks
 
Shorted/open wiring
 
Incorrect fueling
 
MAF sensor
 
Deteriorating HO2S
 
Inlet air leaks
 

Trouble Code: P0135



HO2S-11 Heater Circuit (Bank 1, Sensor 1)

Possible Causes:



Vacuum hose disconnected on exhaust gas recirculation (EGR) system module (ESM) applications
 
Short to VPWR in the harness or HO2S
 
Water in the harness connector
 
Open VPWR circuit
 
Open GND circuit
 
Low battery voltage
 
Corrosion or incorrect harness connections
 
Damaged HO2S heater
 

Trouble Code: P0136



HO2S-12 Circuit Malfunction (Bank 1, Sensor 2)

Possible Causes:



Pinched, shorted, and corroded wiring and pins
 
Crossed sensor wires
 
Exhaust leaks
 
Contaminated or damaged sensor
 

Trouble Code: P0138



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

Possible Causes:



HO2S signal shorted to heater power circuit inside connector
 
HO2S signal circuit shorted to VREF or to system voltage
 
PCM has failed
 

Trouble Code: P0141



HO2S-11 Heater Circuit (Bank 1, Sensor 1)

Possible Causes:



Vacuum hose disconnected on exhaust gas recirculation (EGR) system module (ESM) applications* Short to VPWR in the harness or HO2S
 
Water in the harness connector
 
Open VPWR circuit
 
Open GND circuit
 
Low battery voltage
 
Corrosion or incorrect harness connections
 
Damaged HO2S heater
 

Trouble Code: P0152



HO2S-21 (Bank 2 Sensor 1) Circuit High Input

Possible Causes:



* HO2S is contaminated (due to presence of silicone in fuel)
 
HO2S signal tracking (due to oil or moisture in the connector)
 
HO2S signal circuit is open or shorted to VREF
 
PCM has failed
 

Trouble Code: P0153



HO2S-21 (Bank 2 Sensor 1) Circuit Slow Response

Possible Causes:



HO2S is contaminated (due to presence of silicone in fuel)
 
Leaks present in the exhaust manifold or exhaust pipes
 
HO2S is damaged or has failed
 
PCM has failed
 

Trouble Code: P0155



HO2S-21 (Bank Sensor 1) Heater Circuit Malfunction

Possible Causes:



HO2S heater power circuit is open
 
HO2S heater ground circuit is open
 
HO2S signal tracking (due to oil or moisture in the connector)
 
HO2S is damaged or has failed
 
PCM has failed
 

Trouble Code: P0156



HO2S-22 (Bank 2 Sensor 2) Circuit No Activity

Possible Causes:



Leaks present in the exhaust manifold or exhaust pipes
 
HO2S signal wire and ground wire crossed in connector
 
HO2S element is fuel contaminated or has failed
 
PCM has failed
 

Trouble Code: P0158



HO2S-22 (Bank 2 Sensor 2) Circuit High Input

Possible Causes:



HO2S signal shorted to the heater power circuit (due to oil or moisture in the connector)
 
HO2S signal circuit shorted to VREF or to system voltage
 
PCM has failed
 

Trouble Code: P0161



HO2S-22 (Bank 2 Sensor 2) Heater Circuit Malfunction

Possible Causes:



HO2S heater power circuit or the heater ground circuit is open
 
HO2S signal tracking (due to oil or moisture in the connector)
 
HO2S has failed, or the PCM has failed
 

Trouble Code: P0171



Fuel System Too Lean (Cylinder Bank 1)

Possible Causes:



Air leaks after the MAF sensor, or leaks in the PCV system
 
Exhaust leaks before or near where the HO2S is mounted
 
Fuel injector(s) restricted or not supplying enough fuel
 
Fuel pump not supplying enough fuel during high fuel demand conditions
 
Leaking EGR gasket, or leaking EGR valve diaphragm
 
MAF sensor dirty (causes PCM to underestimate airflow)
 
Vehicle running out of fuel or engine oil dip stick not seated
 

Trouble Code: P0172



Fuel System Too Rich (Cylinder Bank 1)

Possible Causes:



Camshaft timing is incorrect, or the engine has an oil overfill condition
 
EVAP vapor recovery system failure (may be pulling vacuum)
 
Fuel pressure regulator is damaged or leaking
 
HO2S element is contaminated with alcohol or water
 
MAF or MAP sensor values are incorrect or out-of-range
 
One of more fuel injectors is leaking
 

Trouble Code: P0174



Fuel System Too Lean (Cylinder Bank 2)

Possible Causes:



Air leaks after the MAF sensor, or leaks in the PCV system
 
Exhaust leaks before or near where the HO2S is mounted
 
Fuel injector(s) restricted or not supplying enough fuel
 
Fuel system not supplying enough fuel during high fuel demand conditions (e.g., the fuel pump may not supply enough fuel)
 
Leaking EGR gasket, or leaking EGR valve diaphragm
 
MAF sensor dirty (causes PCM to underestimate airflow)
 
Vehicle running out of fuel or engine oil dip stick not seated
 

 
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