AutoZone 2012 BMW 750i xDrive 4.4L Twin Turbo DOHC 8cyl | Repair Guides | Diagnostics | Diagnostic Trouble Codes | 2.8l L6 - Auto 3 | AutoZone.com

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    BMW Cars 1999-06

    2.8L L6 - Auto 3

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    Trouble Code: P1396



    Camshaft Position Sensor -A- Circ Malfunction

    Possible Causes:



    CMP sensor circuit is open or shorted to ground
     
    CMP sensor circuit is shorted to power
     
    CMP sensor ground (return) circuit is open
     
    CMP sensor installation incorrect (Hall-effect type)
     
    CMP sensor is damaged or CMP sensor shielding damaged
     

    Trouble Code: P1397



    Camshaft Position Sensor Circ Malfunction

    Possible Causes:



    CMP sensor circuit is open or shorted to ground
     
    CMP sensor circuit is shorted to power
     
    CMP sensor ground (return) circuit is open
     
    CMP sensor installation incorrect (Hall-effect type)
     
    CMP sensor is damaged or CMP sensor shielding damaged
     

    Trouble Code: P1403



    Evaporative Emission System Shut Off Valve

    Possible Causes:



    EVAP power supply circuit is open
     
    EVAP solenoid control circuit is open or shorted to ground
     
    EVAP solenoid control circuit is shorted to power (B+)
     
    EVAP solenoid valve is damaged or it has failed
     
    EVAP canister has a leak or a poor seal
     

    Trouble Code: P1421



    Secondary Air Injector Valve Circuit Short to Ground

    Possible Causes:



    Connector to the secondary air injection valve is loose or disconnected
     
    Secondary air injector valve circuit short
     
    Secondary air injector valve circuit is open
     
    Faulty secondary air injector valve
     

    Trouble Code: P1423



    Secondary Air Pump Valve Plausibility

    Possible Causes:



    Connector to the secondary air injection valve is loose or disconnected
     
    Secondary air injector valve circuit short
     
    Secondary air injector valve circuit is open
     
    Faulty secondary air injector valve
     

    Trouble Code: P1432



    Secondary Air Injection Valve Open

    Possible Causes:



    Fuel pump relays have failed
     
    Fuel injector has failed
     
    Hoses on the EVAP canister may be clogged
     
    EVAP canister purge regulator valve may be faulty
     
    DME may have failed
     
    Manifold Tuning Valve (IMT) may have failed
     

    Trouble Code: P1453



    Secondary Air Injector Valve Circuit Electrical Malfunction (Disconnection)

    Possible Causes:



    Connector to the secondary air injection valve is loose or disconnected
     
    Secondary air injector valve circuit short
     
    Secondary air injector valve circuit is open
     
    Faulty secondary air injector valve
     

    Trouble Code: P1470



    EVAP Emission Control LDP Circuit Electrical Malfunction

    Possible Causes:



    EVAP canister system has an improper or broken seal
     
    Evaporative Emission (EVAP) canister purge regulator valve 1 is faulty
     
    Leak Detection Pump (LDP) is faulty
     

    Trouble Code: P1475



    EVAP Emission Control LDP Circuit Malfunction/Signal Circuit Open

    Possible Causes:



    Leak Detection Pump has failed
     
    EVAP canister system has an improper or broken seal
     
    Evaporative Emission (EVAP) canister purge regulator valve 1 is faulty
     
    Hoses between the fuel pump and the EVAP canister are faulty
     
    Fuel filler cap is loose
     
    Fuel pump seal is defective, faulty or otherwise leaking
     
    Hoses between the EVAP canister and the fuel flap unit are faulty
     
    Hoses between the EVAP canister and the evaporative emission canister purge regulator valve are faulty
     

    Trouble Code: P1476



    EVAP Emission Control LDP Circuit Malfunction/Insufficient Vacuum

    Possible Causes:



    Leak Detection Pump has failed
     
    EVAP canister system has an improper or broken seal
     
    Evaporative Emission (EVAP) canister purge regulator valve 1 is faulty
     
    Hoses between the fuel pump and the EVAP canister are faulty
     
    Fuel filler cap is loose
     
    Fuel pump seal is defective, faulty or otherwise leaking
     
    Hoses between the EVAP canister and the fuel flap unit are faulty
     
    Hoses between the EVAP canister and the evaporative emission canister purge regulator valve are faulty
     

    Trouble Code: P1509



    Idle Air Control Valve

    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: P1511



    Differentiated Intake Manifold Control Circuit Electrical

    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: P1519



    Engine Oil Quality Sensor Temperature Measurement

    Possible Causes:



    Replace the oil temperature sensor
     

    Trouble Code: P1522



    Intake Camshaft Control (Bank 2) Malfunction

    Possible Causes:



    Camshaft control circuit is open or shorted to ground
     
    Camshaft sensor is damaged or the DME has failed
     
    Camshaft out of adjustment
     

    Trouble Code: P1526



    Camshaft Control Circuit 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: P1527



    Variable Camshaft Timing (VANOS) Circuit Malfunction

    Possible Causes:



    Replace the 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: P1542



    Throttle Actuation Potentiometer Range/Performance

    Possible Causes:



    Throttle valve control module is faulty
     
    Throttle valve is damaged or dirty
     
    Throttle valve must be in closed throttle position
     
    Accelerator pedal is out of adjustment (AEG engines only)
     
    Throttle position actuator is shorting to ground or power
     

    Trouble Code: P1550



    Idle Air Control Valve

    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: P1624



    Thermostat Control Circuit Malfunction

    Possible Causes:



    Check for low coolant level or incorrect coolant mixture
     
    DME detects a short circuit wiring in the ECT
     
    CHT sensor is out-of-calibration or it has failed
     
    ECT sensor is out-of-calibration or it has failed
     
    Replace the thermostat
     

    Trouble Code: P1626



    Throttle/Pedal Position Sensor Rationality Check

    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: P1743



    Pressure Regulator Valve 5 Upper Threshold

    Possible Causes:



    Pressure control solenoid circuit is shorting to ground
     
    Pressure control solenoid circuit is open
     
    Valve has failed
     
    TCM has failed
     

    Trouble Code: P1750



    Shift Solenoid Power Supply Malfunction

    Possible Causes:



    Pressure control solenoid circuit is shorting to ground
     
    Pressure control solenoid circuit is open
     
    Valve has failed
     
    TCM has failed
     

    Trouble Code: P1753



    Pressure Regulator Valve 4 Upper Threshold

    Possible Causes:



    Pressure control solenoid circuit is shorting to ground
     
    Pressure control solenoid circuit is open
     
    Valve has failed
     
    TCM has failed
     

    Trouble Code: P1758



    Shift Solenoid B

    Possible Causes:



    Pressure control solenoid circuit is shorting to ground
     
    Pressure control solenoid circuit is open
     
    Valve has failed
     
    TCM has failed
     

     
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