P051B - OBD II Trouble Code

Our automotive experts have put together the following information about the P051B diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P051B code.

OBD II Fault Code

• OBD II P051B

OBD-II Code Oil leaking from the engine is defined as a Crankcase Pressure Sensor Circuit Range/Performance

The Crankcase Pressure Sensor tells the engine control module (PCM) how much pressure is building up inside the engine. If the PCM detects an incorrect signal from the Crankcase Pressure Sensor, the PCM will set code P051B.

Oil leaking from the engine Symptoms

• Oil leaking from the engine

Common Problems That Trigger the P051B Code

• Crankcase pressure sensor failure
• Powertrain Control Module (PCM) failure
• Wiring issue