The Lemon IndexThe crankcase pressure reading doesn't make sense.
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 sensor. Then: pCV problem.
Owners named P051B in 10 complaints to the U.S. government, most often on the Ford Escape.
Cars owners report it on
Complaints that name P051B, by model. Raw counts, not a failure rate: popular models get more complaints.
Years owners report it on most: 2017 Ford Escape · 2018 Ford EcoSport
The details
What P051B means
The crankcase pressure reading doesn't make sense.
Can I drive with P051B?
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.
30% of the owner complaints that name P051B also say the car shakes, runs rough or misfires. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P051B
- Failed sensor
- PCV problem
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Shakes, runs rough or misfires: 30% of complaints
- Rattles or knocks: 20% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P051B most
2017 Ford Escape (3), 2018 Ford EcoSport (2).
Related codes
P0513 P0520 P0521 P0523 P0524 P050D P050B P050A
Quick answers
What does P051B mean?
Crankcase Pressure Sensor Circuit Range/Performance. The crankcase pressure reading doesn't make sense.
Can I drive with P051B?
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 P051B?
Failed sensor; PCV problem.
Counts: NHTSA owner complaints whose text names P051B. 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.