P0691

2017-10-10

Description:

  • The fault code P0691 suggests that there is an issue with the control circuit of the primary cooling fan of the engine. This may result in the engine overheating or reduced performance due to poor cooling.

Possible Symptoms:

  • Engine overheating

  • Illuminated check engine light

  • Reduced engine performance

  • Poor cooling performance

Possible Causes:

  • Faulty primary cooling fan

  • Wiring or connection problems in the fan control circuit

  • Failed cooling fan relay

  • Failed engine control module (ECM)

Related Parts:

  • Cooling Fan: Radiator fan. Problems lead to engine overheating

Possible Solutions:

  • Replace the primary cooling fan

  • Check and repair any damaged wiring or connections in the fan control circuit

  • Replace the cooling fan relay

  • Replace the engine control module (ECM) if necessary

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