P2DA7
Coolant Heater A Control Module System Voltage
The system voltage feedback of the coolant heater A control module is outside the expected window.
The system voltage feedback of the coolant heater A control module is outside the expected window.
Common causes
- high
System voltage drifted
One of the most commonly reported causes for this code — check this first.
Typical part cost: $220-1320
- medium
Feedback wire fault
A plausible cause — test and verify before replacing parts.
Typical part cost: $220-1320
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P2DA7 mean?
P2DA7 means "Coolant Heater A Control Module System Voltage". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P2DA7?
system voltage drifted; feedback wire fault — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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