P0471
Exhaust Pressure Sensor Range/Performance
Generic code
Auxiliary Emissions Control
Medium severity
Hard repair
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What P0471 means
- The fault code P0471 suggests that there is a problem with the range or performance of the exhaust pressure sensor. This may result in poor engine performance or even engine damage.
Possible symptoms
- Reduction in engine performance
- Engine misfires or stalls
- Decreased fuel efficiency
- Illuminated check engine light
Possible causes
- Defective exhaust pressure sensor
- Clogged or damaged exhaust system
- Wiring or connection issues in the circuit
- Failed engine control module (ECM)
Related parts
- Exhaust Back Pressure Sensor: Exhaust Back Pressure sensor detects any kind of back pressure in the exhaust system. Back pressure is the pressure opposite to the exhaust flow resulting in a lower power output. This car's malfunctioning back pressure sensor may lead to higher emissions & lower performance
Possible solutions
- Replace the exhaust pressure sensor
- Check and repair any issues with the exhaust system
- Inspect and repair any damaged wiring or connections in the circuit
- Replace the engine control module (ECM) if necessary
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P0471 on OBD DashX
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