Search the library

Find reliability topics fast

Search across 192 technical insights, blog posts, brand hubs, buying guides, and reliability pages by symptom, engine, gearbox, brand, or system.

49 results

Showing matches for "BMW 1 Series".

TT
Fault CodeEngine timing

P0017: Crankshaft / camshaft timing correlation, bank 1 sensor B

The exhaust-camshaft and crankshaft signals on bank 1 are outside their expected relationship.

Open result ->
TT
Fault CodeCombustion

P0301: Cylinder 1 misfire detected

The ECU detected repeated combustion misfires on cylinder 1.

Open result ->
TT
Fault CodeDiesel preheating

P0671: Cylinder 1 glow-plug circuit

The glow-plug circuit for cylinder 1 has an electrical or current-consumption fault.

Open result ->
TT
Fault CodeFuel mixture / emissions

P2195: Oxygen sensor signal stuck lean, bank 1 sensor 1

The upstream oxygen sensor on bank 1 remains at a lean indication despite ECU correction.

Open result ->
TT
Fault CodeOxygen sensing

P0030: Heated oxygen sensor heater control circuit, bank 1 sensor 1

The ECU detects an electrical fault in the heater circuit for the upstream oxygen sensor.

Open result ->
TT
Fault CodeCooling system

P261A: Coolant pump B control circuit open

The ECU detects an open circuit in an auxiliary or electrically driven coolant-pump circuit.

Open result ->
TT
Fault CodeCamshaft sensing

P0340: Camshaft position sensor circuit, bank 1

The ECU is missing or cannot trust the camshaft position signal on bank 1.

Open result ->
TT
Fault CodeABS / stability control

C1112: ABS pump motor or supply circuit fault

The brake-control module detects a fault in the ABS pump motor circuit or its power supply.

Open result ->
TT
Fault CodeChassis / suspension

C1130: Chassis control or suspension pressure fault

A chassis or suspension control module has detected an implausible pressure, height, or control-state condition.

Open result ->
TT
Fault CodeVariable valve timing

P0011: Intake camshaft timing over-advanced, bank 1

The intake camshaft is more advanced than the ECU expects for the current operating condition.

Open result ->
TT
Fault CodeVariable valve timing

P0014: Exhaust camshaft timing over-advanced, bank 1

The exhaust camshaft position is more advanced than commanded or is slow to return to the expected position.

Open result ->
TT
Fault CodeEngine timing

P0016: Crankshaft / camshaft timing correlation

The ECU sees the crankshaft and camshaft signals outside their expected relationship.

Open result ->
TT
Fault CodeAir metering

P0101: Mass-air-flow signal range / performance

Airflow reported by the MAF sensor does not agree with the ECU's calculated operating conditions.

Open result ->
TT
Fault CodeAir metering

P0102: Mass-air-flow circuit low input

The MAF sensor signal is lower than expected for the engine speed and load.

Open result ->
TT
Fault CodeAir metering

P0106: Manifold absolute pressure range / performance

The MAP sensor signal does not match the pressure expected from throttle position, boost, engine speed, and airflow.

Open result ->
TT
Fault CodeAir metering

P0113: Intake-air temperature sensor circuit high

The ECU sees an intake-air temperature signal that is higher voltage than expected, often interpreted as an unrealistically cold reading.

Open result ->
TT
Fault CodeCooling system

P0118: Engine coolant temperature sensor circuit high

The coolant-temperature signal is implausibly high voltage, often read by the ECU as extremely cold coolant.

Open result ->
TT
Fault CodeThrottle control

P0121: Throttle / pedal position sensor range / performance

The ECU sees a throttle or accelerator-position signal that is outside the expected relationship.

Open result ->
TT
Fault CodeCooling system

P0128: Coolant thermostat below regulating temperature

The engine is taking too long to reach expected operating temperature or is running cooler than the ECU expects.

Open result ->
TT
Fault CodeOxygen sensing

P0130: Oxygen sensor circuit malfunction, bank 1 sensor 1

The upstream oxygen or lambda sensor signal is implausible, missing, or outside the control range expected by the ECU.

Open result ->
TT
Fault CodeOxygen sensing

P0135: Oxygen sensor heater circuit, bank 1 sensor 1

The upstream oxygen sensor heater circuit is not operating as expected.

Open result ->
TT
Fault CodeOxygen sensing

P0141: Oxygen sensor heater circuit, bank 1 sensor 2

The downstream oxygen sensor heater circuit is not reaching expected operation.

Open result ->
TT
Fault CodeFuel mixture

P0171: System too lean, bank 1

Fuel trim has reached a lean threshold because the ECU is adding more fuel than expected.

Open result ->
TT
Fault CodeFuel mixture

P0172: System too rich, bank 1

Fuel trim has reached a rich threshold because the ECU is removing more fuel than expected.

Open result ->
TT
Fault CodeFuel delivery

P0191: Fuel rail pressure sensor range / performance

The rail-pressure signal is implausible or does not follow commanded pressure correctly.

Open result ->
TT
Fault CodeCooling system

P0217: Engine coolant over-temperature condition

The engine controller recorded coolant temperature above its safe operating threshold.

Open result ->
TT
Fault CodeEGR

P0401: Exhaust-gas recirculation flow insufficient

Measured or inferred EGR flow is lower than the controller expects.

Open result ->
TT
Fault CodeSecondary air

P0411: Secondary-air injection incorrect flow

The ECU does not see the expected oxygen-sensor response when the secondary-air system runs on cold start.

Open result ->
TT
Fault CodeEmissions

P0420: Catalyst efficiency below threshold, bank 1

Upstream and downstream oxygen-sensor behavior suggests insufficient catalyst oxygen-storage performance.

Open result ->
TT
Fault CodeEVAP

P0441: EVAP purge flow incorrect

The fuel-vapor purge system flow is not matching the ECU's commanded behavior.

Open result ->
TT
Fault CodeExhaust / DPF

P0471: Exhaust pressure sensor range / performance

The exhaust-pressure sensor signal is implausible for engine load, speed, and DPF pressure conditions.

Open result ->
TT
Fault CodeCooling system

P0480: Cooling fan control circuit 1

The ECU cannot control or verify the primary electric cooling-fan circuit.

Open result ->
TT
Fault CodeExhaust temperature sensing

P0544: Exhaust-gas temperature sensor circuit, bank 1 sensor 1

The ECU sees an electrical fault in an exhaust-temperature sensor used to protect the turbo and emissions system.

Open result ->
TT
Fault CodeEngine electronics

P0641: Sensor reference voltage A circuit open

A shared 5-volt reference circuit for engine sensors is missing, shorted, or pulled out of range.

Open result ->
TT
Fault CodeTransmission

P0715: Input / turbine speed sensor circuit

The transmission controller cannot trust the input or turbine speed signal.

Open result ->
TT
Fault CodeTransmission

P0741: Torque converter clutch stuck off / performance

The torque converter clutch is not locking as expected or slip remains too high.

Open result ->