The Lemon IndexThe crankcase ventilation (PCV) system isn't controlling pressure the way it should.
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
Failed PCV valve or oil separator. Then: cracked PCV hose; vacuum leak.
Owners named P052E in 172 complaints to the U.S. government, most often on the Mercedes-Benz C-Class.
Models that report it most
Complaints that name P052E, by model. Raw counts, not a failure rate: popular models get more complaints. Tap a model for its years, mileage and what owners say fixed it.
P052E by model: P052E Mercedes-Benz C-Class (93) · P052E Mercedes-Benz GLK/GLC (33) · P052E Mercedes-Benz GLA (13) · P052E Mercedes-Benz CLA (12)
Years owners report it on most: 2016 Mercedes-Benz C-Class · 2017 Mercedes-Benz C-Class · 2015 Mercedes-Benz C-Class · 2018 Mercedes-Benz C-Class · 2018 Mercedes-Benz GLK/GLC · 2017 Mercedes-Benz GLK/GLC
The details
What P052E means
The crankcase ventilation (PCV) system isn't controlling pressure the way it should.
Can I drive with P052E?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
3% of the owner complaints that name P052E also say the car stalls or shuts off. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P052E
- Failed PCV valve or oil separator
- Cracked PCV hose
- Vacuum leak
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Stalls or shuts off: 3% of complaints
- Shakes, runs rough or misfires: 2% of complaints
- Uses or leaks oil: 2% of complaints
- Loses power or goes into limp mode: 2% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P052E most
2016 Mercedes-Benz C-Class (32), 2017 Mercedes-Benz C-Class (26), 2015 Mercedes-Benz C-Class (22), 2018 Mercedes-Benz C-Class (13), 2018 Mercedes-Benz GLK/GLC (12), 2017 Mercedes-Benz GLK/GLC (10).
Related codes
P0524 P0523 P0521 P0520 P051B P0513 P050D P050B
Quick answers
What does P052E mean?
Positive Crankcase Ventilation Regulator Valve Performance. The crankcase ventilation (PCV) system isn't controlling pressure the way it should.
Can I drive with P052E?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
What causes P052E?
Failed PCV valve or oil separator; Cracked PCV hose; Vacuum leak.
Counts: NHTSA owner complaints whose text names P052E. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.