Guide To P051C OBD Error Code Solutions

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This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another. This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

The trouble code P051C can be defined as Crankcase Pressure Sensor Circuit Low. There are a number of sensors and out of all of them, the engine control module monitors as well as adjusts in order to keep the car engine running properly. It is the crankcase pressure sensor which is responsible for providing the crankcase pressure values to the ECM so that it can maintain a healthy atmosphere.

What causes this problem with the Crankcase Pressure Sensor Circuit Low?

• Issues related to PCV like broken runners/tubes, disconnected, chafed lines, etc
• There can be clogged PCV system
• Moisture present in the oil
• Defects in the crankcase pressure sensor
• Faults in the positive crankcase ventilation valve
• Problem of water intrusion
• There might be some internal electrical issue within the sensor
• Malfunctioning in the engine control module
• There can be bad electrical connection in the crankcase pressure sensor circuit
• The car engine might be filled with oil
• Flaws in the crankcase pressure sensor
• The crankcase pressure sensor might be open or shorted

1. Fuel Pressure Regulator - Do you remember when was the last time you got your car Fuel Pressure Regulator checked up? A defective Fuel Pressure Regulator can cause a lot of issues like displaying P051C code.
2. Camshaft Position Sensor - Are there some faults in your Camshaft Position Sensor? Don’t waste time and get them replaced or else P051C code can turn up.
3. PCV System - Everything is fine with Camshaft Position Sensor and still P051C code triggering? Then you must get your PCV System checked.
4. Engine Control Module - There can be some issues with the Engine Control Module due to which you may see P051C code appearing over and over again. Visit us to buy best quality Engine Control Module online.
5. Engine Wiring Connectors - A lot of issues can arise do to defective Engine Wiring Connectors. Did you just see P051C code flashing? Now you know the reason why it is appearing. Get it inspected and replaced on time.
6. Powertrain Control Module - Faulty Powertrain Control Module can be the reason why P051C code is flashing. Visit us to purchase top notch Powertrain Control Module online.
7. Crankshaft Position Sensor - It is an important auto part which needs full care. A faulty Crankshaft Position Sensor can be a reason behind the flashing up of P051C code.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P051C code by mentioning some major symptoms below:

Common Symptoms

• Appearance of the check engine light
• Unusual engine performance
• Sludge in oil
• The smell of fuel might start coming
• Flashing up of the check engine light
• The crankcase pressures might be high/low
• Reduction in the overall fuel economy
• There can be a leakage in the gaskets
• Engine might be smoking black soot

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P051C:

• Carefully correct the problem of water intrusion
• If there are some faults in the crankcase pressure sensor, then you must replace it
• Correct the issue of internal electrical issue within the sensor
• Restore the positive crankcase ventilation valve
• Make sure that the clogged PCV system is repaired properly
• You can always replace the crankcase pressure sensor if it is opened or shorted
• Replace the engine control module if it is not functioning properly
• Inspect the crankcase pressure sensor

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Carefully research the technical service bulletins for known issues with the specific vehicle in the troubleshooting process. Advanced diagnostic steps become very vehicle specific and may require the appropriate advanced equipment and knowledge to perform accurately

Have a look basic steps below but refer to a vehicle year/make/model/powertrain specific repair guide for specific steps for your vehicle

• You should open the oil cap on the top of the engine to inspect for any obvious signs of sludge build-up. Sludge can be caused by something as simple as a lack of oil changes, or following longer than recommended intervals. A positive crankcase ventilation issue can cause moisture to enter the system causing sludge too. Either way, ensure your oil is clean and full. You must keep this thing in mind to avoid overfilling the engine with oil. Do not start engine if this has happened, drain oil to bring level to an acceptable range
• Test the sensor by following manufacturer specific desired values from your service manual. This usually entails using your multimeter and testing different values between pins. Record and compare findings to your make and model specifications. If anything is outside of specs, then you must replace the crankcase pressure sensor
• The crankcase pressure sensors are typically mounted directly to the engine block (AKA Crankcase), the harnesses and wires involved, are routed through crevices and around extreme temperature areas (i.e. exhaust manifold). You must be aware of this when visually inspecting the sensor and circuits. The fact that these wires and harnesses are subject to the elements, inspect for any hardened/cracked wires or moisture in the harness. Keep this in mind that the connector should be connected firmly and dry of any oil residue