BMW Cars 1999-06

2.5L L6 - Std 4

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Trouble Code: P0446



EVAP Control System Large Leak Detected

Possible Causes:



Aftermarket EVAP hardware non-conforming to specifications
 
EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged
 
EVAP canister purge valve stuck closed, or canister damaged
 
Fuel filler cap missing, loose (not tightened) or the wrong part
 
Loose fuel vapor hose/tube connections to EVAP components
 
Canister vent (CV) solenoid stuck open
 
Fuel tank pressure (FTP) sensor has failed mechanically
 

Trouble Code: P0455



EVAP Control System Large Leak Detected

Possible Causes:



Aftermarket EVAP hardware non-conforming to specifications
 
EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged
 
EVAP canister purge valve stuck closed, or canister damaged
 
Fuel filler cap missing, loose (not tightened) or the wrong part
 
Loose fuel vapor hose/tube connections to EVAP components
 
Canister vent (CV) solenoid stuck open
 
Fuel tank pressure (FTP) sensor has failed mechanically
 

Trouble Code: P0456



EVAP Control System Small Leak Detected

Possible Causes:



Aftermarket EVAP hardware non-conforming to specifications
 
EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged
 
EVAP canister purge valve stuck closed, or canister damaged
 
Fuel filler cap missing, loose (not tightened) or the wrong part
 
Loose fuel vapor hose/tube connections to EVAP components
 
Canister vent (CV) solenoid stuck open
 
Fuel tank pressure (FTP) sensor has failed mechanically
 

Trouble Code: P0491



Secondary Air Injection System Insufficient Flow (Bank 1)

Possible Causes:



Air pump output is blocked or restricted
 
AIR bypass solenoid is leaking or it is restricted
 
AIR bypass solenoid is stuck open or stuck closed
 
Check valve (one or more) is damaged or leaking
 
Electric air injection pump hose(s) leaking
 
Electric air injection pump is damaged or faulty
 

Trouble Code: P0492



Secondary Air Injection System Insufficient Flow (Bank 2)

Possible Causes:



Air pump output is blocked or restricted
 
AIR bypass solenoid is leaking or it is restricted
 
AIR bypass solenoid is stuck open or stuck closed
 
Check valve (one or more) is damaged or leaking
 
Electric air injection pump hose(s) leaking
 
Electric air injection pump is damaged or faulty
 

Trouble Code: P0500



Vehicle Speed Sensor -A- Malfunction

Possible Causes:



VSS signal circuit is open or shorted to ground
 
VSS harness circuit is shorted to ground
 
VSS harness circuit is shorted to power
 
VSS circuit open between the DME and related control module
 
VSS or wheel speed sensors circuits are damaged
 
Modules connected to VSC/VSS harness circuits are damaged
 
Mechanical drive mechanism for the VSS is damaged
 

Trouble Code: P0501



Vehicle Speed Sensor or PSOM Range/Performance

Possible Causes:



VSS signal circuit is open or shorted to ground
 
VSS harness circuit is shorted to ground
 
VSS harness circuit is shorted to power
 
VSS circuit open between the DME and related control module
 
VSS or wheel speed sensors circuits are damaged
 
Modules connected to VSC/VSS harness circuits are damaged
 
Mechanical drive mechanism for the VSS is damaged
 

Trouble Code: P0505



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: P0506



Idle Air Control System RPM Lower Than Expected

Possible Causes:



Air inlet is plugged or the air filter element is severely clogged
 
IAC circuit is open or shorted
 
IAC circuit VPWR circuit is open
 
IAC solenoid is damaged or has failed
 
The VSS has failed
 

Trouble Code: P0507



Idle Air Control System RPM Higher Than Expected

Possible Causes:



Air intake leak located somewhere after the throttle body
 
IAC control circuit is shorted to chassis ground
 
IAC solenoid is damaged or has failed
 
Throttle Valve Control module has failed or is clogged with carbon
 
The VSS has failed
 

Trouble Code: P0600



Serial Communication Link (Data BUS) Message Missing

Possible Causes:



CAN data bus wires have short circuited to each other
 

Trouble Code: P0601



Internal Control Module Memory Check Sum Error

Possible Causes:



Battery terminal corrosion, or loose battery connection
 
Connection to the DME interrupted, or the circuit has been opened
 
Reprogramming error has occurred
 
and needs replacement. Remember to check for Aftermarket Performance Products before replacing a DME.
 

Trouble Code: P0604



Internal Control Module Random Access Memory (RAM) Error

Possible Causes:



Battery terminal corrosion, or loose battery connection
 
Connection to the DME interrupted, or the circuit has been opened
 
Reprogramming error has occurred
 
and needs replacement. Remember to check for Aftermarket Performance Products before replacing a DME.
 

Trouble Code: P0605



DME Read Only Memory (ROM) Test Error

Possible Causes:



An attempt was made to change the module calibration, or a module programming error may have occurred
 
Clear the trouble codes and then check for this trouble code. If it resets, the DME has failed and needs replacement.
 
Aftermarket performance products may have been installed.
 
The Transmission Control Module (TCM) has failed.
 

Trouble Code: P0606



DME Internal Communication Error

Possible Causes:



Clear the trouble codes and then check for this trouble code. If it resets, the DME has failed and needs replacement.
 
Remember to check for signs of Aftermarket Performance Products installation before replacing the DME.
 

Trouble Code: P1111



O2 Control (Bank 1) System Too Lean

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor (behind catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
Circuit wiring has a short to power or ground
 
Engine Component Power Supply Relay is faulty
 
E-box fuses for oxygen sensor are faulty
 
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
 

Trouble Code: P1112



O2 Control (Bank 1) System Too Rich

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor (behind catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
Circuit wiring has a short to power or ground
 
Engine Component Power Supply Relay is faulty
 
E-box fuses for oxygen sensor are faulty
 
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
 

Trouble Code: P1134



HO2S Heater Circuit Current 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
 

Trouble Code: P1135



HO2S Heater Circuit Current 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
 

Trouble Code: P1136



HO2S Heater Circuit Heater Resistance

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
 

Trouble Code: P1137



Long Term Fuel Trim Add. Fuel, Bank 1 System Too Rich

Possible Causes:



Air intake system leaking, vacuum hoses leaking or damaged
 
Air leaks located after the MAF sensor mounting location
 
EGR valve sticking, EGR diaphragm leaking, or gasket leaking
 
EVAP vapor recovery system has failed
 
Excessive fuel pressure, leaking or contaminated fuel injectors
 
Exhaust leaks before or near the HO2S(s) mounting location
 
Fuel pressure regulator is leaking or damaged
 
HO2S circuits wet or oily, corroded, or poor terminal contact
 
HO2S is damaged or it has failed
 
HO2S signal circuit open, shorted to ground, shorted to power
 
Low fuel pressure or vehicle driven until it was out of fuel
 
Oil dipstick not seated or engine oil level too high (overfilled)
 

Trouble Code: P1138



HO2S Circuit Malfunction

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
 

Trouble Code: P1139



HO2S Circuit Malfunction

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
 

Trouble Code: P1149



O2 Control (Bank 1) Out of Range (Sensor Aging)

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor (behind catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
Circuit wiring has a short to power or ground
 
Engine Component Power Supply Relay is faulty
 
E-box fuses for oxygen sensor are faulty
 
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
 

Trouble Code: P1155



HO2S Heater Circuit Current 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
 

Trouble Code: P1157



HO2S Heater Circuit Current Malfunction-Heater Resistance

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
 

Trouble Code: P1338



Camshaft Position Sensor (Bank 1) Open/Short to B+

Possible Causes:



Faulty CPM sensor
 

Trouble Code: P1339



Camshaft Position Sensor (Bank 1) Open/Short to B+

Possible Causes:



Faulty CPM sensor
 

Trouble Code: P1352



Random/Multiple Misfire Detected

Possible Causes:



Fuel metering fault that affects two or more cylinders
 
Fuel pressure too low or too high, fuel supply contaminated
 
EVAP system problem or the EVAP canister is fuel saturated
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Ignition system fault (coil, plugs) affecting two or more cylinders
 
MAF sensor contamination (it can cause a very lean condition)
 
Vehicle driven while very low on fuel (less than 1/8 of a tank)
 

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: 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: 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: 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: P2089



Inlet -A- Camshaft Position Control Circuit High Bank 1

Possible Causes:



Camshaft position control wiring harness connector is damaged or open
 
Camshaft adjustment valve has failed
 
Circuit is open or grounded
 
Assembly is damaged or it has failed (an open circuit)
 
DME power supply relay has failed
 

Trouble Code: P2090



Outlet -B- Camshaft Position Control Circuit Low Bank 1

Possible Causes:



Camshaft position control wiring harness connector is damaged or open
 
Camshaft adjustment valve has failed
 
Circuit is open or grounded
 
Assembly is damaged or it has failed (an open circuit)
 
DME power supply relay has failed
 

 
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