P037A
Generic code
Free on OBD DashX
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See which problems come with P037A, how often it shows up in other vehicles, and how to fix it — step by step.
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What P037A means
- Glow Plug/Heater Indicator Control Circuit Low
Possible symptoms
- Check the glow plug/heater indicator control circuit for any loose or damaged connections.
- Inspect and test the glow plug/heater relay for proper functioning and replace if necessary.
- Check the glow plugs/heater element for any signs of damage or malfunction and replace as needed.
- Ensure that the engine coolant temperature sensor is reading accurately and replace if faulty.
- Finally, inspect the glow plug/heater control module for any faults and replace if necessary.
Possible causes
- Faulty glow plug or heater control module
- Malfunctioning glow plug or heater relay
- Wiring issues or loose connections in the glow plug/heater indicator control circuit
- Faulty engine coolant temperature sensor
- Faulty engine control module (ECM)
Possible solutions
- Engine misfires or struggles to start in cold weather
- Poor fuel economy
- Check engine light illuminates
- Decreased engine performance or power
- Difficulty accelerating or maintaining speed
Free on OBD DashX
P037A on OBD DashX
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