P0691
Cooling Fan 1 Relay Control Circuit Low
Generic code
Auxiliary Emissions Control
High severity
Hard repair
Free on OBD DashX
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What P0691 means
- 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
Free on OBD DashX
P0691 on OBD DashX
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