Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a sensor that checks the pressure inside the engine. This code means that the sensor is saying the pressure is too high.
The P051D code indicates that the engine control module (ECM) has detected a high voltage signal from the crankcase pressure sensor, suggesting high pressure in the crankcase.
The crankcase pressure sensor monitors the pressure within the engine's crankcase. A high circuit reading typically means that the sensor is detecting more pressure than normal, which could be due to a sensor fault, wiring issue, or actual high pressure in the crankcase.
• Check Engine Light illuminated
• Poor engine performance
• Increased oil consumption
• Faulty crankcase pressure sensor
• Wiring issues such as shorts or open circuits
• Actual high crankcase pressure due to engine problems
Crankcase: The part of the engine that houses the crankshaft.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the crankcase pressure sensor and its wiring for damage.
• Check the actual crankcase pressure using a mechanical gauge.
• Replace the crankcase pressure sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Address any engine issues causing high crankcase pressure.
• OBD-II scanner
• Multimeter
• Mechanical pressure gauge
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regular engine maintenance
• Check and replace sensors as needed
• Monitor engine oil levels and quality
Sensor Issue
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if performance issues are severe.
Check with your vehicle manufacturer for warranty coverage on sensors.
This code is commonly seen in vehicles with aging engines or those that have not been regularly maintained.
Moderate – Should be addressed soon to avoid potential engine damage.
Ignoring this code could lead to increased emissions and potential engine damage.
• Engine running
• Vehicle at normal operating temperature
The crankcase pressure sensor is typically located on or near the engine block.
Q: Can I drive with a P051D code?
A: It's not recommended to drive for extended periods with this code as it may lead to engine damage.
Q: How do I clear a P051D code?
A: After repairs, use an OBD-II scanner to clear the code from the ECM.
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