What are the common causes of P053C?

PCV heater A signal pulled high. A short to voltage in the PCV heater A circuit. An open heater A element driving the reading high. Corrosion or water in the heater A connector. A failed heater driver in the control module.

Inspect the PCV heater A connector for corrosion. Test the PCV heater A element for continuity. Test the heater A control wire for a short to voltage. Command the PCV heater A on and watch current. Replace the PCV heater A if the element is open. Clear the code and retest.

P053C

PCV Heater A Control Circuit High

System: Speed and idle control (P code)
Lamp: Check Engine Light
Category: Powertrain - Computer and Auxiliary Controls

What it means

P053C means PCV Heater A Control Circuit High.

Check these first

PCV heater A signal pulled high
A short to voltage in the PCV heater A circuit
An open heater A element driving the reading high
Corrosion or water in the heater A connector
A failed heater driver in the control module

What to do next

Inspect the PCV heater A connector for corrosion
Test the PCV heater A element for continuity
Test the heater A control wire for a short to voltage
Command the PCV heater A on and watch current
Replace the PCV heater A if the element is open
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.