P0473
Exhaust Pressure Sensor High
Generic code
Auxiliary Emissions Control
Medium severity
Hard repair
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What P0473 means
- The fault code P0473 indicates that there is an issue with the exhaust pressure sensor circuit, specifically a high input signal received by the engine control module (ECM). This can potentially cause issues with the engine's overall performance.
Possible symptoms
- Illuminated check engine light
- Decreased fuel efficiency
- Reduced engine power or acceleration
- Rough idle or stalling
Possible causes
- Faulty exhaust pressure sensor
- Wiring or connection issues within the exhaust pressure sensor 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 faulty exhaust pressure sensor
- Check and repair any damaged wiring or connections within the circuit
- Replace the engine control module (ECM) if necessary
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P0473 on OBD DashX
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