P0078

2017-10-10

Description:

  • The fault code P0078 indicates that there is an issue with the Exhaust Valve Control Solenoid Circuit for Bank 1. This may cause the engine to run poorly or not start at all.

Possible Symptoms:

  • Illuminated check engine light

  • Reduced engine power or acceleration

  • Difficult starting or stalling

  • Rough running engine

Possible Causes:

  • Faulty Exhaust Valve Control Solenoid

  • Damaged wiring or connections in the circuit

  • Loose or corroded electrical connections

  • Failed engine control module (ECM)

Related Parts:

  • Exhaust Valve: The exhaust gases after combustion are sent out of the engine through the exhaust valve. Problems lead to harmful emissions out of limit

Possible Solutions:

  • Replace the Exhaust Valve Control Solenoid

  • 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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