Continental 2000-2002

4.6L V8 VIN V Auto 4

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Trouble Code: P1288



Cylinder Head Temperature Sensor Out of Self-Test Range

Possible Causes:



CHT sensor harness connector is damaged
 
CHT sensor is damaged
 
Engine coolant level is too low
 
Engine is cold, or the engine is overheated
 

Trouble Code: P1289



Cylinder Head Temperature (CHT) Sensor Circuit High

Possible Causes:



Open CHT sensor circuit
 
CHT sensor circuit short to voltage
 
Damaged CHT sensor
 
Improper harness connection
 

Trouble Code: P1290



Cylinder Head Temperature (CHT) Sensor Circuit Low

Possible Causes:



Grounded circuit in CHT harness
 
Damaged CHT sensor
 
Improper harness connection
 

Trouble Code: P1299



Cylinder Head Over-Temperature Protection Active

Possible Causes:



Cooling system has a problem
 
Engine coolant level is too low
 
A Base Engine problem may be present
 
TSB 10-29-1 contains repair help for this code (LS & T-Bird)
 

Trouble Code: P1309



Misfire Monitor Disabled

Possible Causes:



Camshaft position sensor is damaged or it has failed
 
CKP, ECT or MAF sensors may be out-of-calibration or failed
 
PCM has failed
 
TSB 02-22-1 contains repair information for this trouble code
 

Trouble Code: P1336



CKP or CMP Signal Malfunction

Possible Causes:



Base Engine problem or concern exists
 
CKP sensor or CMP signal circuit is open or shorted to ground
 
CKP sensor or CMP sensor is damaged or failed (check for EMI/RFI on this circuit).
 
PCM has failed
 
TSB 02-22-1 contains repair information for this trouble code
 

Trouble Code: P1380



Variable Cam Timing Solenoid 'A' Circuit Malfunction (Bank 1)

Possible Causes:



VCT solenoid circuit is open or shorted
 
VCT solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1381



Variable Cam Timing Over-Advanced (Cylinder Bank 1)

Possible Causes:



Cam timing improperly set
 
No oil flow to VCT piston chamber, or low engine oil pressure
 
VCT solenoid valve stuck in closed position
 
Camshaft advance mechanism binding (inside the VCT unit)
 

Trouble Code: P1383



Variable Cam Timing Over-Retarded (Cylinder Bank 1)

Possible Causes:



Cam timing improperly set
 
Low oil pressure, VCT piston chamber not receiving any oil flow
 
VCT solenoid valve stuck in closed position
 
Camshaft advance mechanism binding (inside the VCT unit)
 

Trouble Code: P1400



DPFE Sensor Circuit Low Input

Possible Causes:



DPF EGR signal circuit shorted to ground
 
DPF EGR signal VREF circuit open
 
DPF EGR sensor is damaged or has failed
 
PCM has failed
 
TSB 4-3-1 contains repair information for this trouble code
 

Trouble Code: P1401



DPFE Sensor Circuit High Input

Possible Causes:



DPF EGR signal circuit open, or sensor ground circuit open
 
DPF EGR signal shorted to VREF or to power
 
DPF EGR sensor is damaged or has failed
 
PCM has failed
 
TSB 4-3-1 contains repair information for this trouble code
 

Trouble Code: P1405



DPFE Sensor Upstream Hose Off Or Plugged

Possible Causes:



DPF EGR sensor upstream hose is disconnected
 
DPF EGR sensor upstream hose is plugged (ice)
 
EGR tube is plugged or damaged
 

Trouble Code: P1406



DPFE Sensor Downstream Hose Off Or Plugged

Possible Causes:



Check for signs of icing in the hose, or for a restricted tube
 
DPF EGR sensor downstream hose is disconnected
 
DPF EGR sensor downstream hose is plugged (ice)
 
EGR tube is plugged or damaged
 

Trouble Code: P1408



EGR Flow Out Of Self-Test Range

Possible Causes:



EGR vacuum regulator solenoid vacuum supply problem
 
EVR valve stuck closed or iced up, or the flow path is restricted
 
EGR valve diaphragm leaking, hose is off, plugged or leaking
 
EGR VR solenoid open or the VPWR circuit is open
 
DPF EGR sensor pressure hoses connected wrong (reversed)
 
DPF EGR downstream hose connection leaking or plugged
 
EGR Orifice tube assembly is damaged
 
DPF EGR sensor or the EGR VR solenoid is damaged, or the PCM has failed
 

Trouble Code: P1409



EGR Vacuum Regulator Solenoid Circuit Malfunction

Possible Causes:



EGR VR solenoid circuit is open, or shorted to ground
 
EGR VR circuit is shorted to power or the VPWR circuit is open
 
EGR vacuum regulator solenoid is damaged or the PCM has failed
 

Trouble Code: P1413



Secondary AIR System Monitor Circuit Low Input

Possible Causes:



AIR solenoid control circuit is open or it is shorted to ground
 
AIR pump is damaged or it has failed
 
Solid State relay is damaged or it has failed
 
Solid State relay battery power circuit (B+) is open
 
PCM has failed
 

Trouble Code: P1414



Secondary AIR System Monitor Circuit High Input

Possible Causes:



AIR Monitor circuit from the pump to the PCM is open
 
AIR solenoid control circuit is shorted to power
 
Solid State relay is damaged or has failed
 
AIR pump ground circuit is open
 
AIR pump is damaged or has failed
 
PCM has failed
 

Trouble Code: P1436



A/C Evaporator Temperature (A/CET) Circuit Low Input

Possible Causes:



ACET signal circuit shorted to sensor ground (return)
 
ACET signal circuit shorted to chassis ground
 
ACET sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1437



A/C Evaporator Temperature (ACET) Circuit High Input

Possible Causes:



ACET signal circuit is open, or the ground circuit is open
 
ACET signal is shorted to VREF
 
ACET sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1450



Unable to Bleed Up Fuel Tank Vacuum

Possible Causes:



CV solenoid is stuck partially or fully open or filter is plugged
 
EVAP canister tube or EVAP canister purge outlet tube blocked or kinked between fuel tank, purge valve and EVAP canister
 
Fuel filler cap stuck closed (vacuum relief cannot occur)
 
Contaminated fuel vapor elbow at the EVAP canister, or the EVAP canister is restricted or canister purge valve stuck open
 

Trouble Code: P1451



EVAP System Canister Vent Solenoid Circuit Malfunction

Possible Causes:



CV solenoid circuit is open, shorted to ground or system power
 
CV solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1461



A/C Pressure Sensor Circuit High Input

Possible Causes:



ACP sensor circuit shorted to VREF or to power (VPWR)
 
ACP sensor circuit is open, or the ground circuit is open
 
ACP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1462



A/C Pressure Sensor Circuit Low Input

Possible Causes:



ACP sensor circuit shorted to VREF or to power (VPWR)
 
ACP sensor circuit is open, or the ground circuit is open
 
ACP sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1463



A/C Pressure Sensor Insufficient Pressure Change

Possible Causes:



A/C system mechanical failure, or A/C clutch always engaged
 
ACP sensor signal open, or sensor ground circuit open
 
A/C sensor is damaged or the PCM has failed
 

Trouble Code: P1469



Low A/C Cycling Period

Possible Causes:



Cycling pressure switch circuit open between pin 41 (ACCS) and the PCM, or the IGN RUN circuit is open to the cycling pressure switch circuit (if applicable)
 
Mechanical A/C system concern (i.e., low refrigerant charge, damaged A/C switch)
 

Trouble Code: P1477



Medium Fan Control Primary Circuit Malfunction

Possible Causes:



MFC circuit is open
 
MFC circuit is shorted to ground
 
MFC relay power circuit (VPWR) is open
 
Medium speed FC relay is damaged or it has failed
 
PCM has failed
 

Trouble Code: P1479



High Fan Control Primary Circuit Malfunction

Possible Causes:



HFC circuit is open
 
HFC circuit is shorted to ground
 
HFC relay power circuit (VPWR) is open
 
High speed FC relay is damaged or it has failed
 
PCM has failed
 

Trouble Code: P1500



VSS Signal Or POSM Signal Intermittent

Possible Causes:



VSS pins damaged, loose or pushed in at the connector
 
VSS circuit open or shorted in the wiring harness (insulation)
 
VSS wiring harness routing incorrect or VSS mounting incorrect
 
TSB 01-21-13 contains a repair procedure for this trouble code
 

Trouble Code: P1501



VSS Signal Out Of Self-Test Range

Possible Causes:



VSS signal is noisy due to Radio Frequency Interference/ Electro-Magnetic Interference (RFI/EMI) from outside devices (ignition wires, charging circuit or aftermarket devices)
 

Trouble Code: P1502



VSS Signal Intermittent

Possible Causes:



VSS+ or VSS- harness circuit is open
 
TCSS signal or TCSS signal return harness circuit is open
 
VSS harness circuit, TCSS harness circuit is shorted to ground
 
VSS harness circuit, CSS harness circuit is shorted to power
 
VSS circuit open between the PCM and related control module
 
VSS or TCSS, or wheel speed sensors circuits are damaged
 
Modules connected to VSC/VSS harness circuits are damaged
 
Mechanical drive mechanism for the VSS or TCSS is damaged
 

Trouble Code: P1504



Idle Air Control Circuit Malfunction

Possible Causes:



IAC circuit is open, shorted to ground or to the VPWR circuit
 
IAC solenoid VPWR circuit is open
 
IAC valve is damaged or has failed
 
PCM has failed
 

Trouble Code: P1506



Idle Air Control Overspeed Error

Possible Causes:



Base engine vacuum leaks present
 
EVAP system has a problem
 
IAC circuit shorted to ground
 
IAC valve is stuck open, or it is damaged
 
Throttle body or throttle plate is contaminated or very dirty
 

Trouble Code: P1507



Idle Air Control Underspeed Error

Possible Causes:



Air inlet is plugged or the air filter element is severely clogged
 
IAC circuit is open, or shorted to the VPWR circuit
 
IAC circuit VPWR circuit is open
 
IAC solenoid is damaged or has failed
 
Throttle body or throttle plate is contaminated or very dirty
 

Trouble Code: P1512



Intake Manifold Runner Control System Malfunction

Possible Causes:



Leaky vacuum reservoir, vacuum lines loose or damaged
 
Vacuum solenoid or vacuum actuator is damaged
 
IMRC actuator cable/gears are seized, or the cables are improperly routed or seized
 
IMRC housing return springs are damaged or disconnected
 
Lever/shaft return stop may be obstructed or bent, or the lever/shaft wide open stop may be obstructed or bent, or the IMRC lever/shaft may be sticking, binding or disconnected
 
IMRC control circuit open, shorted or the VPWR circuit is open
 
PCM has failed
 

Trouble Code: P1513



Intake Manifold Runner Control Malfunction (Bank 1)

Possible Causes:



IMRC actuator cable/gears are seized, or the cables are improperly routed or seized
 
IMRC control circuit open, shorted or the VPWR circuit is open
 
IMRC housing return springs are damaged or disconnected
 
Leaky vacuum reservoir, vacuum lines loose or damaged
 
Lever/shaft return stop may be obstructed or bent, or the lever/shaft wide open stop may be obstructed or bent, or the IMRC lever/shaft may be sticking, binding or disconnected
 
Vacuum solenoid or vacuum actuator is damaged
 
PCM has failed
 

Trouble Code: P1516



Intake Manifold Runner Control Input Error (Bank 1)

Possible Causes:



IMRC mechanical fault - the linkage may be bound or seized
 
Inspect for binding or improper routing. The cable core wire at the IMRC/IMSC housing attachment must have slack and lever must contact close plate stop screw
 

Trouble Code: P1517



Intake Manifold Runner Control Input Error (Bank 2)

Possible Causes:



IMRC mechanical fault - the linkage may be bound or seized
 
Visually inspect for binding or improper routing. The cable core wire at the IMRC or IMSC housing attachment must have slack and lever must contact close plate stop screw
 

Trouble Code: P1518



Intake Manifold Runner Control Malfunction (Stuck Open)

Possible Causes:



IMRC monitor signal circuit shorted to power ground
 
IMRC Monitor signal circuit shorted to signal ground (return)
 
IMRC actuator is damaged or has failed
 
PCM has failed
 

Trouble Code: P1519



Intake Manifold Runner Control Stuck Closed

Possible Causes:



IMRC monitor signal circuit shorted to power ground
 
IMRC Monitor signal circuit shorted to signal ground (return)
 
IMRC actuator is damaged or has failed (e.g., there may be a small leak in the vacuum diaphragm of the actuator)
 
PCM has failed
 

Trouble Code: P1520



Intake Manifold Runner Control Input Error

Possible Causes:



IMRC control circuit is open or shorted to ground
 
IMRC Monitor VREF circuit is open
 
IMRC is damaged or the PCM has failed
 

 
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