Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means the car's computer is saying that the sensor checking oil pressure is not seeing enough pressure. It's like a thermometer showing a low temperature when it should be higher.
The engine control module (ECM) detects a low signal from the oil pressure sensor/switch B, indicating lower than expected oil pressure.
The P055C code is triggered when the ECM detects that the oil pressure sensor/switch B is reading a pressure lower than the specified range. This can be due to a faulty sensor, wiring issues, or actual low oil pressure within the engine.
• Check Engine Light is on
• Low oil pressure warning light
• Engine noise due to low oil pressure
• Poor engine performance
• Faulty oil pressure sensor/switch B
• Low engine oil level
• Wiring issues or poor electrical connections
• Faulty oil pump
• Engine mechanical issues
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Check engine oil level and condition
• Inspect oil pressure sensor/switch B and its wiring
• Test oil pressure with a mechanical gauge
• Inspect for any engine mechanical issues
• Replace faulty oil pressure sensor/switch B
• Repair or replace damaged wiring
• Change engine oil and filter
• Repair or replace faulty oil pump
• OBD-II scanner
• Multimeter
• Mechanical oil pressure gauge
$100 - $300
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regular oil changes
• Regularly check oil level
• Inspect and maintain engine components
Sensor Issue
• Check and maintain proper oil level
• Address any oil leaks promptly
Check with the vehicle manufacturer for specific warranty coverage on sensors and engine components.
This code has been commonly reported in vehicles with high mileage or poor maintenance history.
High – Low oil pressure can lead to severe engine damage if not addressed promptly.
Driving with low oil pressure can cause engine damage and is unsafe. Address this issue immediately.
• Engine at operating temperature
• Engine running at idle
The oil pressure sensor/switch B is typically located near the oil filter or oil pan on the engine block.
Q: Can I drive with a P055C code?
A: It's not recommended to drive with this code as it can lead to engine damage due to low oil pressure.
Q: How do I reset the P055C code?
A: After fixing the issue, use an OBD-II scanner to clear the code. If the problem persists, the code may reappear.
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