Positive Crankcase Ventilation Heater Control Circuit / Open
Table of contents
P053A MERCURY Possible Causes
- Faulty Positive Crankcase Ventilation (PCV) heater assembly
- Positive Crankcase Ventilation (PCV) heater assembly harness is open or shorted
- Positive Crankcase Ventilation (PCV) heater assembly circuit poor electrical connection
How do I fix code P053A MERCURY?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P053A MERCURY code
The cost of diagnosing the P053A MERCURY code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P053A MERCURY Description
The Engine Control Module (ECM) monitors the Positive Crankcase Ventilation Heater Control Circuit. The P053A codes set when the Powertrain Control Module (PCM) detects that the actual Positive Crankcase Ventilation Heater Control (PCVHC) circuit voltage is less than the desired voltage.