The crankcase pressure sensor sends the required crankcase pressure data to a powertrain control module (PCM) to keep the engine running smoothly.
If indeed the PCM senses, so one or even more electrical values are functioning beyond the intended range of the crankcase pressure sensor circuit, it will set code P051B.
A familiar powertrain diagnostic trouble code (DTC) appears on OBD-II automobiles.
One can find it in major car manufacturers like Ford, Nissan, Jeep while also being seen on other makes and models.
What Does Code P051B Mean?
Error Code P051B refers to the range and performance of the crankcase pressure sensor circuit.
If your car has an OBD-II system, this is a general-purpose trouble code that applies to all vehicles with this system, crafted since 1996.
Code P051B means & deciphering it:
A pressure sensor informs the PCM how so much pressure builds up in the crankcase of the engine.
- The PCM needs to get accurate data from the pressure sensor to keep seals and gaskets from wear and tear by too much pressure.
- The sensor also checks the pressure when unburned fumes go back into the engine through the positive crankcase ventilation (PCV) system, which is what this sensor is for.
- People who have clogs in their PCV system might have crankcase pressure build-up.
- And this might cause the gaskets and oil lines to break and leak oil.
- The PCM will set a code P051B if the crankcase pressure sensor sends out insufficient data.
- Although the code does not immediately endanger your safety or your vehicle’s performance, it might develop into more significant issues if left ignored.
- As a result, it should be handled as soon as possible rather than later.
Price for fixing the issue
- The labor cost to fix the P051B FORD code is approximately 1.0 hours.
- The diagnosis time and labor prices for auto repairs vary depending on region and vehicle make, model, or engine type.
- The hourly rate for most vehicle repair firms is between $75 – $150.
PS: The meaning of the code P051B may vary depending on the maker of the car. Consult the correct repair manual and perhaps repair database to find out what the code means.
Causes, Symptoms, and fixing the P051B:
Causes:
- Your CCPS is experiencing an internal electrical problem.
- The ECM flags the PCV (Positive Crankcase Ventilation) valve is faulty.
- PCV physical damage (damaged runners/tubes, detached, chafed lines, etc.)
- Sludgy lubrication, carbon accumulation, or moisture/condensation in the crankcase can lead to a cloggy system.
- Intake of water into the crankcase (absolutely not good!)
- Perhaps your engine is too lubricated (easily fixable issue)
Symptoms
Once you have the P051B DTC, you may expect to see the following:
- The gas mileage is less than usual.
- Leaking gaskets
- Check Exhaust, and the CEL (Check Engine Light) is on.
- The engine is idling poorly.
- In comparison to free-running engine oil, engine oil is sludgy.
- The exhaust produces black smoke and soot.
- Internal crankcase pressure measurements (high/low)
Diagnosis
- The first step in diagnosing any failure is to look for Technical Service Bulletins (TSB) for recognized problems with the specific vehicle.
- These differ based on the make and engine; therefore, your automobile service specialist should look for your specific make, model, and trim level.
- Some technicians may even search for TSBs by VIN to identify TSBs particular to your vehicle more quickly.
- Advanced diagnostic processes are generally vehicle specific.
- Therefore determining the core reason for your P051B DTC may need the use of manufacturer-specific advanced equipment.
- And which your technician should be familiar with.
Fixing some common issues, the seriousness of P051B code:
Common blunders
- Occasionally, vehicle service providers may bypass the TSB-recommended diagnostic and replace the sensor.
- And this not only does not always solve the problem but also runs the danger of causing a more significant and costly problem.
- It is especially true if your car pops a gasket or even a crankcase seal because the pressure is high or too low.
How serious is it?
- This defect would be regarded moderate-low priority in the overall scheme of car maintenance.
- If your CCPS fails, you will not experience instant engine failure, rendering your car immobile.
- One should treat the issue as soon as possible.
- Since the long-term repercussions of excessive or low crankcase pressure can indeed be costly to fix.
Repairs Will Resolve A P051B DTC
- Begin by changing the oil and make sure it’s not too full.
- It removes any sludgy oil which may be causing this problem, so if your crankcase is overflowing, it will also repair that issue.
- Changing the CCPS is often the best solution, but make sure a trained technician inspects your crankcase for any damage.
- And leaks before you reinstall the sensor and call it a day.
- Examine the CCPS wire harness and repair any hard or damaged wiring kit that may be producing sensor malfunctions or erroneous readings.
Some other questions:
Related questions & Frequently asked questions:
Q1.) What is the status of the P051B FORD codes repair?
Answer: Examine the associated wire harness and connections visually. Examine the connector’s pins for broken, bent, shoved out, or corroded components.
Q2.) Why does the P051B FORD code come?
Answer: Crankcase Pressure Sensor Harness Faulty Crankcase Pressure Sensor cables is open or shorted
The poor electrical connection in the Crankcase Pressure Sensor
Q3.) How much does it cost to troubleshoot the P051B FORD code?
Answer: The labor time to fix the P051B FORD code is 1.0 hours.
The hourly rate for most vehicle repair firms is between $75 and $150.
Q4.) How does the P051B code affect the general pricing for correcting it?
Answer: The diagnosis time and labor prices for auto repairs vary depending on region, vehicle make and model, and even engine type.
Delaying aid may result in more costly harm.
Q5.) So what would I do if the Check Engine or Service Engine Soon light remains illuminated?
Answer: Absolutely nothing of concern here. The automobile is advising you to get auto assistance as soon as possible.
When you get to your location, check whether the gas cap is loose or missing.
Q6.) What kind of steps must one take for correcting check engine light P051B?
Answer: When refueling, always switch off your engine.
If the light doesn’t go during a few short drives after replacing or tightening the gas cap, have your car repaired by a skilled repair expert as soon as possible!
Q7.) What does a flashing Service Engine Soon / Check Engine light mean for P051A?
Answer: If the indicator is flashing, it indicates that a severe engine problem, including a catalyst-damaging misfire, is occurring and should be repaired as quickly as possible.
Q8.) Can we ignore check engine light codes and errors like P051B and keep on driving?
Answer: You can still drive safely, but you should limit your driving time.
Avoid driving at high speeds or excessive weight (such as towing or carrying heavy equipment).
Q9.) What Exactly Are Technical Service Bulletins for error assistance in P051B?
Answer: The automobile manufacturer issues Technical Service Bulletins (TSB) to aid personnel with diagnosis and repair.
Q10.) What kinds of issues can a TSB correct for P051B?
Answer: Specific problems or situations, such as harsh idles, sounds, and rattles, are addressed in TSBs.
These specific problems may result from feedback from customers or repair shops.
Q11.) What does the FORD P051B code mean?
Answer: One can monitor a Crankcase Pressure Sensor pulse by the Engine Control Module (ECM).
Whenever the Crankcase Pressure Sensor does not meet factory requirements, the ECM sets the OBDII code.
Q12.) How can TSB assist with your automotive?
Answer: For a specific problem or situation, the TSB will give an engineering-approved automotive modification, repair technique, or service item that is up to date.
Q13.) How to Interpret Engine Codes?
Answer: Although some manufacturers provide instructions on interpreting this code using an engine warning light, utilizing an OBDII scanner is much more accurate.
Q14.) Do you have a question about the P051B FORD code?
Answer: To get a P051b Ford code checked out by a professional, locate a repair business in your region.
Q15.) How can one erase or repair a check engine light?
Answer: Erasing or Clearing the Engine Light
Once the issue you resolve by yourself, an engine light can indeed you can also remove using an OBDII scanner or by unplugging the car battery for further than 30 minutes.
Q16.) How can the OBDII function?
Answer: A Diagnostic Trouble Code” (DTC) is also stored in the computer’s memory by the ECM or PCM. This DTC can be accessed using a code reading device to assist in diagnosing car problems.
Q17.) What are the probable symptoms of the P051B FORD code?
Answer: The engine light one can check illuminates again and again. (or Service Engine Soon Warning Light)
Q18.) Do you have a question about the P051B FORD code?
Answer: P051B FORD OBDII Code – Crankcase Pressure Sensor Circuit.
Do you want to learn more about repairing the P051B FORD code? Then Obtain Factory Service Manuals
Final Verdict:
Although a P051B DTC is not causing concern, you must take your vehicle to an authorized automobile service provider as soon as possible.
Hopefully, you’re only out of oil, or perhaps the sensor and wire harness have failed.
If the problem is more complex, you will still have handled it before it causes significant and costly engine damage.
So, the best chance is always to pay attention to such codes.
Thanks for reading!