P0479
Exhaust Pressure Control Valve Intermittent
Generic code
Auxiliary Emissions Control
Medium severity
Hard repair
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What P0479 means
- The fault code P0479 indicates that there is an intermittent issue with the exhaust pressure control valve. This valve helps to regulate the pressure in the exhaust system to ensure that it is within safe levels. An intermittent issue with this valve can lead to poor engine performance or even engine damage.
Possible symptoms
- Reduced engine power or acceleration
- Illuminated check engine light
- Engine overheating
- Poor fuel economy
Possible causes
- Malfunctioning exhaust pressure control valve
- Faulty wiring or connections in the circuit
- Loose or corroded electrical connections
- 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 control valve
- Check and repair any damaged wiring or connections
- Tighten or clean any loose or corroded electrical connections
- Replace the engine control module (ECM) if necessary
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P0479 on OBD DashX
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