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.

52 results

Showing matches for "sensor".

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 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 CodeKnock control

P0325: Knock sensor circuit malfunction

The ECU is not receiving a plausible signal from the knock sensor circuit.

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 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 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 CodeNOx sensing

P2201: NOx sensor circuit range / performance

A NOx sensor signal or its controller behavior is outside the expected operating range.

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 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 CodeTurbocharging

P0236: Turbo boost sensor range / performance

The charge-pressure signal is outside the expected range or disagrees with operating conditions.

Open result ->
TT
Fault CodeEngine speed sensing

P0335: Crankshaft position sensor circuit

The ECU is missing or cannot trust the crankshaft position signal.

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 CodeAutomatic transmission

P0706: Transmission range sensor circuit range / performance

The selected gear or park/neutral signal is implausible for the transmission's actual state.

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 CodeElectronic throttle

P2135: Throttle position sensor correlation

The redundant throttle-position signals disagree beyond the permitted tolerance.

Open result ->
TT
Fault CodeDPF sensing

P2453: DPF differential-pressure sensor range / performance

The pressure signal used to calculate DPF restriction is implausible or outside range.

Open result ->
TT
Fault CodeTurbocharging

P2563: Turbocharger boost-control position sensor range / performance

The reported turbo actuator position does not match the requested or mechanically possible range.

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 CodeEmissions

P0420: Catalyst efficiency below threshold, bank 1

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

Open result ->
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 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

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 CodeFuel delivery

P0087: Fuel rail pressure too low

Measured fuel pressure fell below the pressure requested by the engine controller.

Open result ->
TT
Fault CodeFuel delivery

P0088: Fuel rail pressure too high

Measured fuel-rail pressure exceeds the value requested by the engine controller.

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 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 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 ->