BMW Cars 1999-06

3.0L L6 - Std 7

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Trouble Code: P1500



Idle Air Control Valve Malfunction

Possible Causes:



Charge air system leaks
 
Recirculating valve for turbocharger is faulty
 
Turbocharging system is damaged
 
Vacuum diaphragm for turbocharger needs adjusting
 
Wastegate bypass regulator valve is faulty
 

Trouble Code: P1501



Idle Air Control Valve Malfunction

Possible Causes:



Charge air system leaks
 
Recirculating valve for turbocharger is faulty
 
Turbocharging system is damaged
 
Vacuum diaphragm for turbocharger needs adjusting
 
Wastegate bypass regulator valve is faulty
 

Trouble Code: P1502



Idle Air Control Valve Circuit Short to B+

Possible Causes:



Fuel delivery unit connector is loose or not attached
 
Fuse 18 cause a short to the transfer fuel pump or the O2S
 
Fuel pump has failed
 
Fuel pump relay circuit is shorted to ground, B+ or is open
 
Fuel Pump (FP) Relay not activated
 

Trouble Code: P1503



Idle Air Control Valve Circuit Short to Ground

Possible Causes:



Fuel delivery unit connector is loose or not attached
 
Fuse 18 cause a short to the transfer fuel pump or the O2S
 
Fuel pump has failed
 
Fuel pump relay circuit is shorted to ground, B+ or is open
 
Fuel Pump (FP) Relay not activated
 

Trouble Code: P1504



Idle Air Control Valve Circuit Continuity-Open Load

Possible Causes:



Fuel delivery unit connector is loose or not attached
 
Fuse 18 cause a short to the transfer fuel pump or the O2S
 
Fuel pump has failed
 
Fuel pump relay circuit is shorted to ground, B+ or is open
 
Fuel Pump (FP) Relay not activated
 

Trouble Code: P1506



Idle Air Control Valve Circuit Short to B+

Possible Causes:



Fuel delivery unit connector is loose or not attached
 
Fuse 18 cause a short to the transfer fuel pump or the O2S
 
Fuel pump has failed
 
Fuel pump relay circuit is shorted to ground, B+ or is open
 
Fuel Pump (FP) Relay not activated
 

Trouble Code: P1507



Idle Air Control Valve Circuit Short to Ground

Possible Causes:



Fuel delivery unit connector is loose or not attached
 
Fuse 18 cause a short to the transfer fuel pump or the O2S
 
Fuel pump has failed
 
Fuel pump relay circuit is shorted to ground, B+ or is open
 
Fuel Pump (FP) Relay not activated
 

Trouble Code: P1508



Idle Air Control Valve Circuit Continuity-Open Load

Possible Causes:



Fuel delivery unit connector is loose or not attached
 
Fuse 18 cause a short to the transfer fuel pump or the O2S
 
Fuel pump has failed
 
Fuel pump relay circuit is shorted to ground, B+ or is open
 
Fuel Pump (FP) Relay not activated
 

Trouble Code: P1512



Differentiated Intake Manifold Control Circuit Signal Low

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
 

Trouble Code: P1513



Differentiated Intake Manifold Control Circuit Signal High

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
 

Trouble Code: P1515



Engine Off Timer Plausibility

Possible Causes:



Check the CAN bus
 
Check instrument cluster/power module/Can Signal if no other CAN faults are detected
 

Trouble Code: P1517



Rough Road Detection, No Wheel Speed Signal

Possible Causes:



Possible failure of wheel speed sensor on drive axle
 

Trouble Code: P1518



Rough Road Detection, Wheel Speed Too High

Possible Causes:



Possible failure of wheel speed sensor on drive axle
 

Trouble Code: P1520



Engine Oil Quality Sensor Level Measurement Error

Possible Causes:



Replace the oil temperature sensor
 
Check BSD wire, voltage supply and oil level sensor ground for an open circuit. If okay, replace the oil level sensor.
 

Trouble Code: P1521



Engine Oil Quality Sensor Communication Error

Possible Causes:



Replace the oil temperature sensor
 
Check BSD wire, voltage supply and oil level sensor ground for an open circuit. If okay, replace the oil level sensor.
 

Trouble Code: P1529



Camshaft Control Circuit Short to B+

Possible Causes:



Fuel pump has failed
 
CPS circuit is open, shorted to ground or shorted to power
 
Battery voltage below 11.5 volts
 
Position actuator circuit may short to B+ or Ground
 
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: P1530



Camshaft Control Circuit Short to Ground

Possible Causes:



Fuel pump has failed
 
CPS circuit is open, shorted to ground or shorted to power
 
Battery voltage below 11.5 volts
 
Position actuator circuit may short to B+ or Ground
 
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: P1532



Camshaft Control Circuit Open

Possible Causes:



Fuel pump has failed
 
CPS circuit is open, shorted to ground or shorted to power
 
Battery voltage below 11.5 volts
 
Position actuator circuit may short to B+ or Ground
 
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: P1535



Differentiated Intake Manifold Coil Temperature Limit Value Exceeded

Possible Causes:



Faulty controller
 
Faulty coil
 

Trouble Code: P1536



Differentiated Intake Manifold Controller Monitoring, Control Deviation

Possible Causes:



Faulty controller
 

Trouble Code: P1537



Differentiated Intake Manifold Potentiometer Voltage in Lower Diagnosis Range

Possible Causes:



Faulty potentiometer
 

Trouble Code: P1538



Differentiated Intake Manifold Potentiometer Voltage in Upper Diagnosis Range

Possible Causes:



Faulty potentiometer
 

Trouble Code: P1539



Differentiated Intake Manifold Coil Temperature Threshold Exceeded

Possible Causes:



Faulty controller
 
Faulty coil
 

Trouble Code: P1551



Engine Off Timer Timeout

Possible Causes:



Check the CAN bus
 
Check instrument cluster/power module/Can Signal
 

Trouble Code: P1604



Internal Control Module Driver Error

Possible Causes:



(If DME was replaced) DME ID not the same as the replaced unit
 
Voltage supply for Engine Control Module (DME) has shorted
 

Trouble Code: P1614



Serial Communication Link ACC Malfunction

Possible Causes:



Circuit from the MIL to the DME
 
ECU Failure, BUS system failure
 
Circuit from the EPC to the DME
 

Trouble Code: P1628



Throttle Valve Adaptation Spring Test Malfunction During Opening (Bank 1)

Possible Causes:



Plate is sticking
 
Defective return spring
 
DVE electrical activation defective
 
DVE motor wiring may have shorted
 
Throttle valve is contaminated with foreign objects
 

Trouble Code: P1629



Throttle Valve Adaptation Spring Test Stop, Spring Does Not Open (Bank 1)

Possible Causes:



Plate is sticking
 
Defective return spring
 
DVE electrical activation defective.
 
DVE motor wiring may have shorted
 
Throttle valve is contaminated with foreign objects
 

Trouble Code: P1631



Throttle Valve Adaptation Spring Test (Bank 1)

Possible Causes:



Plate is sticking
 
Defective return spring
 
DVE electrical activation defective.
 
Throttle position sensor wiring may have shorted
 
Throttle valve is contaminated with foreign objects
 

Trouble Code: P1633



Throttle Valve Adaptation Limp-Home Position Unknown

Possible Causes:



Plate is sticking
 
Defective return spring
 
DVE electrical activation defective.
 
DVE motor wiring may have shorted
 
Throttle valve is contaminated with foreign objects
 

Trouble Code: P1634



Throttle Valve Adaptation Spring Test Failed (Bank 1)

Possible Causes:



Plate is sticking
 
Defective return spring
 
DVE electrical activation defective.
 
Throttle position sensor wiring may have shorted
 
Throttle valve is contaminated with foreign objects
 

Trouble Code: P1635



Throttle Valve Adaptation Lower Mechanical Stop Not Adapted (Bank 1)

Possible Causes:



Travel stop contaminated.
 
Defected DVE
 
Throttle valve contaminated
 

Trouble Code: P1636



Throttle Valve Position Control, Range Check (Bank 1)

Possible Causes:



TP sensor signal circuit is open (inspect wiring & connector)
 
TP sensor signal circuit is shorted to ground
 
TP sensor or module is damaged or it has failed
 
Throttle valve is damaged or dirty
 
Throttle valve control module is faulty
 

Trouble Code: P1637



Throttle Valve Position Control, Control Deviation (Bank 1)

Possible Causes:



TP sensor signal circuit is open (inspect wiring & connector)
 
TP sensor signal circuit is shorted to ground
 
TP sensor or module is damaged or it has failed
 
Throttle valve is damaged or dirty
 
Throttle valve control module is faulty
 

Trouble Code: P1638



Throttle Valve Position Control Throttle Stuck Temporarily (Bank 1)

Possible Causes:



TP sensor signal circuit is open (inspect wiring & connector)
 
TP sensor signal circuit is shorted to ground
 
TP sensor or module is damaged or it has failed
 
Throttle valve is damaged or dirty
 
Throttle valve control module is faulty
 

Trouble Code: P1639



Accelerator Pedal Position Sensor 1+2 Range/Performance

Possible Causes:



Ground between engine and chassis may be broken
 
Throttle position sensor may have failed
 
Accelerator Pedal Position Sensor 2 has failed
 
Throttle position sensor wiring may have shorted
 
Faulty voltage supply
 

Trouble Code: P1641



Throttle Valve Adaptation Stop Due to Environmental Conditions

Possible Causes:



There is no action required
 

Trouble Code: P1642



Throttle Valve Adaptation Stop Due to Environmental Values

Possible Causes:



There is no action required
 

Trouble Code: P1643



Throttle Valve Actuator Start Test Amplifier Balancing Plausibility

Possible Causes:



TP sensor signal circuit is open (inspect wiring & connector)
 
TP sensor signal circuit is shorted to ground
 
TP sensor or module is damaged or it has failed
 
Throttle valve is damaged or dirty
 
Throttle valve control module is faulty
 

Trouble Code: P1644



Throttle Valve Adaptation Stop Relearning Lower Mechanical Stop

Possible Causes:



Travel stop contaminated.
 
Defected DVE
 
Throttle valve contaminated
 

 
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