[SOLVED] P051B Code: Fix Crankcase Pressure Sensor Circuit Range/Performance Issue Now! (2024)

The automobile fault code P051B indicates a problem with the Crankcase Pressure Sensor. This can be identified by the Engine Light or Service Engine Soon Warning Light turning on. The cause of this fault code could be a faulty sensor, an open or shorted sensor harness, or a poor electrical connection in the sensor circuit.

To fix this issue, it is recommended to visually inspect the wiring harness and connectors for any damage.

Look out for broken, bent, pushed out, or corroded pins in the connectors.

The repair time for this problem is estimated to be around 1.0. To interpret the fault code, check the “Possible Causes” mentioned above and follow the suggested steps for inspection and repair.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

Decode The Symptoms: Unveiling The Mystery Of Code P051B

If you see the Engine Light ON or the Service Engine Soon Warning Light, it could be a sign of the p051b fault code.

  • The symptoms of the automobile fault code p051b include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

Unraveling The Mystery: What Causes Fault Code P051B?

The automobile fault code p051b can be caused by a faulty crankcase pressure sensor, an open or shorted sensor harness, or a poor electrical connection in the sensor circuit.

  • The fault code p051b can be caused by a faulty crankcase pressure sensor, an open or shorted harness for the crankcase pressure sensor, or a poor electrical connection in the crankcase pressure sensor circuit.

Fixing Code P051B: Simple Steps To Resolve The Issue

To fix the automobile fault code p051b, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p051b, start by checking the possible causes mentioned above.
  • Then, visually inspect the wiring harness and connectors for any damage.
  • Look for broken, bent, pushed out, or corroded pins on the connectors.
  • This fix should take approximately 1.0 hour.

Cracking The Code: P051B – Cost And Complexity Unveiled!

The factors influencing the cost of diagnosing and fixing the automobile fault code p051b based on the estimated repair time of 1.0 hour include the hourly rate charged by auto repair shops, which typically ranges between $75 and $150.

P051B: Understanding The Causes And Solutions For This Automobile Fault Code

The P051B fault code is related to the Crankcase Pressure Sensor in the automobile’s Engine Control Module (ECM).

The ECM constantly monitors the signal from the Crankcase Pressure Sensor to ensure it is within the factory specifications. If the sensor’s signal is not within the specified range, the ECM will set the P051B fault code.

This code indicates an issue with the Crankcase Pressure Sensor circuit’s range or performance. It is important to address this fault code promptly to ensure the proper functioning of the vehicle’s engine.

FAQ

What are the possible causes for the automobile fault code p051b?

If you see the engine light or service engine soon warning light on, the fault code P051B could be the culprit. This code is often caused by a faulty crankcase pressure sensor, an open or shorted sensor harness, or a poor electrical connection in the sensor circuit. To fix the issue, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. Don’t forget to check the possible causes listed above for a comprehensive solution.

How can I visually inspect the wiring harness and connectors to fix the p051b fault code?

If you’re dealing with the p051b fault code and your engine light is on, it’s time to take action. The most common cause of this issue is a faulty crankcase pressure sensor, but it could also be due to an open or shorted sensor harness or a poor electrical connection. To fix it, start by visually inspecting the wiring harness and connectors. Look for any signs of damage, such as broken or bent pins, corrosion, or components that are out of place. This simple step could be the key to resolving the problem.

What should I look for when checking for damaged components or corroded connector pins to resolve the p051b fault code?

When resolving the p051b fault code, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. These issues can cause a poor electrical connection or an open or shorted circuit. By checking for these specific problems, you can effectively address the cause of the fault code and resolve the issue.

[SOLVED] P051B Code: Fix Crankcase Pressure Sensor Circuit Range/Performance Issue Now! (1)

Wrap Up

If your engine light is on, it could be due to a faulty crankcase pressure sensor or issues with the sensor’s wiring.

To fix this, visually inspect the wiring harness and connectors for any damage.

Look out for broken, bent, pushed out, or corroded pins on the connectors.

Resources

[SOLVED] P051B Code: Fix Crankcase Pressure Sensor Circuit Range/Performance Issue Now! (2024)

FAQs

How serious is a P051B code? ›

It's best to bring it to an expert to fix the problem. Not only does this code have the capacity to seriously injure your crankcase and anything connected to it, but it will also negatively impact your vehicle's fuel economy, meaning that it might actually be cheaper just to fix the problem.

Can an oil pressure sensor cause a P051B code? ›

The P051B code typically indicates a problem related to the crankcase pressure sensor circuit. This could be caused by several potential issues, including a faulty sensor, bad wiring, or a genuine problem with crankcase pressure (which could be caused by other factors like a clogged PCV system).

How much is a crankcase pressure sensor circuit range performance? ›

The Ford Crankcase Pressure Sensor can run anywhere from around $41 on sale up to around $90 for a new part. A typical model number for this iS901-7119, and can be sourced from Your local Autozone.

What does the crankcase pressure sensor do? ›

The Crank Case Pressure Sensor is used to monitor the pressure of the engine oil in the Crankcase, a nd signal a warning if there are any large fluctuations, or if the pressure falls below the minimum or above the maximum indicated pressure.

How serious is a bad crankshaft position sensor? ›

A bad sensor can disrupt the timing of your fuel injection, leading to decreased fuel efficiency and cause you to spend more on gas than you should be. Sudden stalling. A bad sensor can cause your engine to stall suddenly, which can be dangerous, especially if you're driving at high speeds or in heavy traffic.

What does a crankcase vent sensor do? ›

Pressure Sensors

Measure pressure to check the positive crankcase ventilation system for leaks and or disconnects.

What happens if you drive with a bad oil pressure sensor? ›

The issue could be an actual loss of oil pressure inside the engine. So, to minimize the chance of costly internal engine damage, you should shut the car off immediately whenever there's a low oil pressure warning displayed on the dash. Then have the vehicle towed to your destination of choice for diagnosis.

Will low oil cause oil pressure sensor code? ›

With the P0522 code, a low oil pressure issue like a low oil pressure condition will trigger the code. Faulty oil pressure sensors or damaged oil pumps can also cause any of these codes to be set.

Why did my oil pressure sensor go bad? ›

Dirt and debris: The sensor may become clogged with dirt, debris or sludge, especially if the engine oil is not changed regularly. This can prevent the sensor from providing an accurate reading.

Can you drive with a bad pressure sensor? ›

Assuming you can get the engine to start and keep it from dying, it's possible to continue driving your vehicle despite the fuel rail pressure sensor's failure. However, running lean or rich will cause more serious engine problems in the future, so you should only do this in an emergency for a short time.

How much does it cost to replace a crankcase sensor? ›

Expect to pay between $200 and $400 to have a crankshaft sensor replaced. However, if you have a luxury or expensive vehicle, or one in which accessing the sensor is more difficult, the cost can climb higher or even double.

How do you check for excessive crankcase pressure? ›

The easiest and most informative method is as follows: while the engine is warm and running, unscrew the oil drain cap. If you observe only a small amount of smoke coming from the oil filler neck, then the crankcase gas pressure is normal.

How do you get rid of crankcase pressure? ›

Crankcase pressure can be managed by using the engine's intake as a vacuum source (CCV) or an external vacuum source such as a regenerative blower (OCV).

Why is crankcase pressure bad? ›

A crankcase might have excess pressure for three reasons: 1) the exhaust gas recirculation system is blocked or not operating correctly (allowing pressure to build), 2) leaking turbocharger oil seals (leaking compressed air into the turbo lubricating oil drain back), or 3) excess leakage past the engine piston rings ( ...

What happens when a crankcase ventilation system goes bad? ›

If neglected, a faulty PCV system will cause condensation in the oil that leads to blocked passages and damaged bearings, excessive oil consumption, pressure buildup that leads to seal blowouts and oil leaks, and carbon buildup in the intake - any of which could destroy an engine.

What is crank case pressure? ›

Q “What is crankcase pressure?” It's the increased pressure in the crankcase over ambient primarily due to “blow past” of combustion produces past the piston rings. It's inevitable that some of this will occur, but it it is excessive then it points to worn bores or rings. That is not a good thing.

What is the crankcase pressure check engine light? ›

This code points to an issue with the crankcase pressure sensor. Either the sensor is bad, or there is a buildup of pressure in the crankcase. This can be caused by a problem with the PCV valve or an issue with sludge in the oil.

How to fix P051D code? ›

How To Correct OBD Code P051D Crankcase Pressure Sensor Circuit High
  1. Restore the positive crankcase ventilation valve.
  2. Carefully correct the problem of water intrusion.
  3. Inspect the crankcase pressure sensor.
  4. You can always replace the crankcase pressure sensor if it is opened or shorted.

What is the code for crankcase ventilation? ›

A P04DB Code obtained from the Engine Control Unit (ECU) indicates a disconnected, damaged, or malfunctioning crankcase ventilation system. This diagnostic monitors the Positive Crankcase Ventilation (PCV) system for leaks and malfunctions.

References

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