P051B
5 owner reports and 20 manufacturer filings across 8 model years from Ford, Jeep, Ram.
Where P051B shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2017 Ford Escape | Electrical System | 5 | 3 | Battery → |
| 2018 Ford Escape | Engine | 5 | — | |
| 2018 Ford EcoSport | Engine | 1 | 2 | |
| 2023 Ford Bronco | Engine | 2 | — | |
| 2021 Jeep Gladiator | Back Over Prevention | 2 | — | |
| 2021 Jeep Wrangler | Electrical System | 2 | — | Battery → |
| 2020 Ram 1500 | Service Brakes | 2 | — | Brake pads → |
| 2019 Ford EcoSport | Engine | 1 | — |
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
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P051B by make
The same record, one make at a time: the model years, bulletins and owner reports that name P051B on that maker’s vehicles.
What it gets filed under
What owners said
Source: NHTSA complaint databaseOwners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.
The engine codes scanned via the OBDII port directly after are as follows: P051B, P0299, P0340, P0344, P0365 and P0369
20 manufacturer filings name P051B. Start with what the maker wrote down.
A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P051B.
- TSB 23-2185 Service bulletin2023-06-20 · Engine And Engine Cooling
- Some 2023 Bronco vehicles built on or before 12-Jun-2023 equipped with a 2.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P051B stored in the powertrain control module (PCM). This may be due to the software in the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM.
- SSM 51706 Service bulletin2023-06-13 · Engine And Engine Cooling
- Some 2023 Bronco vehicles equipped with a 2.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P051B stored in the powertrain control module (PCM). PCM software is currently under development to resolve this condition and is scheduled to be available by 30-Jun-2023. Monitor OASIS for updates and schedule a follow up with the customer when the s
- S2118000003 Service bulletin2021-04-09 · Electrical System
- Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Codes (DTCs) P051B ? Crankcase Pressure Sensor Circuit Performance, and/or P04DB ? Crankcase Ventilation System Disconnected, Set After Powertrain Control Module (PCM) Replacement
- S2118000003 Service bulletin2021-04-09 · Back Over Prevention
- Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Codes (DTCs) P051B ? Crankcase Pressure Sensor Circuit Performance, and/or P04DB ? Crankcase Ventilation System Disconnected, Set After Powertrain Control Module (PCM) Replacement
- TSB19-2164 Service bulletin2019-05-24 · Engine And Engine Cooling — Exhaust System — Emission Control — Crankcase (Pcv)
- Some 2018-2019 EcoSport vehicles equipped with a 1.0L EcoBoost engine build on or before 16-May-2019 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P051B. This may be due to sensor drift on the crankcase ventilation sensor thresholds. To resolve the condition, follow the Service Procedure to reprogram the powertrain control module (PCM).
- TSB 18-2246 Service bulletin2018-08-17 · Electrical System
- Some 2017-2018 Escape vehicles with a 1.5L Ecoboost engine and built on 2-Feb-2017 and through 3-Aug-2018 may exhibit an illuminated MIL with diagnostic trouble codes (DTCs) P04DB and/or P051B stored in the powertrain control module (PCM). Follow the Service Procedure steps to correct the condition.
What P051B means
Source: SAE J2012 / OBD-IIP051B sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about P051B
Source: NHTSA files and the OBD-II standardCan I keep driving with P051B stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.