P053A
PCV Heater A Control Circuit Open
The heater on PCV path A - used to prevent ice plugs in the crankcase ventilation hose during cold weather - has an open control circuit. Without it, condensation can freeze and block PCV flow, raising crankcase pressure dangerously.
The heater on PCV path A - used to prevent ice plugs in the crankcase ventilation hose during cold weather - has an open control circuit. Without it, condensation can freeze and block PCV flow, raising crankcase pressure dangerously.
Common causes
- high
Open in harness or heater element
One of the most commonly reported causes for this code — check this first.
Typical part cost: $70-280
- low
Pin pushed back out of connector body
Less common, but worth ruling out after the more likely causes.
Typical part cost: $70-280
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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 P053A mean?
P053A means "PCV Heater A Control Circuit Open". It is a generic OBD-II code that points to a fault in the vehicle speed, idle control, auxiliary inputs.
What are the most common causes of P053A?
open in harness or heater element; pin pushed back out of connector body; cracked solder joint inside the module or sensor — 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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