P053A code meaning
PCV Heater A Control Circuit/Open
Powertrain system Generic code P05xx codes Check engine light
What P053A means
The PCV heater is an electric element of a few ohms (Saab: 6–10 Ω) at the junction of the ventilation hose and the intake; it stops water in the blow-by gas from freezing and blocking the ventilation in frost. The module switches it to ground. P053A means its control circuit is open. GM's diesels of 2016 check it with 20 of 40 samples below 90 °C coolant without warning lamp, GM Europe's 2.0 CDTI in the Saab 9-5 with the lamp on the first trip – a difference even within GM. The heater then has no effect, which only matters in hard frost.
P053A at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P053A
- Often none, except in frost
- Check engine light (depending on the maker)
- In frost: oil leaks or loss of power from frozen ventilation
Common causes of P053A
- Most likelyHeating element burnt out
- Most likelyConnector or wire open, corrosion
- PossibleFuse of the ignition supply blown
- Less likelyEngine module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pcv heaterHeater wiringEngine control module
What each part of P053A means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 3A | The exact fault in that area. |
What to do next
- Note P053A and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P053A
What does P053A mean?
P053A means "PCV Heater A Control Circuit/Open". The PCV heater is an electric element of a few ohms (Saab: 6–10 Ω) at the junction of the ventilation hose and the intake; it stops water in the blow-by gas from freezing and blocking the ventilation in frost. It is a generic code, so it means the same on every make.
Is it safe to drive with P053A?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P053A fail an emissions test?
Yes, it can. P053A is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P053A to fix?
Difficulty: easy. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P053A clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.