Error Code P051E: What It Means & What To Do?

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The P051E can be defined as Crankcase Pressure Sensor Circuit Intermittent/Erratic. This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model.

Willing to learn something more about this trouble code? The crankcase pressure sensor signal is monitored by the engine control module. The trouble code P051E would be set up by the engine control module when the crankcase pressure sensor would not be as per the factory specifications.

What causes this problem with the Crankcase Pressure Sensor Circuit Intermittent/Erratic?

• There might be some internal electrical issue within the sensor
• Malfunctioning in the engine control module
• Faults in the positive crankcase ventilation valve
• Issues related to PCV like broken runners/tubes, disconnected, chafed lines, etc
• PCV system might be clogged
• There can be moisture present in the oil
• Water intrusion
• Car engine might be overfilled with oil
• Defects in the crankcase pressure sensor
• There can be open or shorted crankcase pressure sensor
• Crankcase pressure sensor circuit poor electrical connection

1. Powertrain Control Module - There can be some issues with the Powertrain Control Module due to which you may see P051E code appearing over and over again. Visit us to buy best quality PCM online.
2. Fuel Pressure Regulator - A lot of issues can arise do to defective Fuel Pressure Regulator. Did you just see P051E code flashing? Now you know the reason why it is appearing. Get it inspected and replaced on time.
3. Crankshaft Position Sensor - Faulty Crankshaft Position Sensor can be the reason why P051E code is flashing. Visit us to purchase top notch Crankshaft Position Sensor online.
4. PCV System - It is an important auto part which needs full care. A faulty PCV System can be a reason behind the flashing up of P051E code.
5. Engine Control Module - OBD Code P051E can appear because of faulty Engine Control Module.
6. Camshaft Position Sensor - There can be some issues with the Camshaft Position Sensor due to which you may see P051E code appearing over and over again. Visit us to buy best quality Camshaft Position Sensor online.
7. Engine Wiring Connectors - Are you facing some faults in your Engine Wiring Connectors? Don’t worry and get them replaced or else P051E code can turn up.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• The crankcase pressures might be high/low
• Appearance of the check engine light
• Smell of fuel can start coming
• Illumination of the check engine light
• Sludge in oil
• The fuel economy might start diminishing
• The gasket may start leaking
• Engine might be smoking black soot
• Unusual engine performance

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• 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
• Carefully correct the problem of water intrusion
• Inspect the crankcase pressure sensor
• 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
• Restore the positive crankcase ventilation valve
• Make sure that the clogged PCV system is repaired properly

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Here are some steps which you should follow in order to diagnose this fault code:

Step 1

• 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

Step 2

• 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

Step 3

• It is the crankcase pressure sensors which are typically mounted directly to the engine block (AKA Crankcase), the harnesses and wires involved, are routed through crevices and around extreme temperature areas
• 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