Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that there's a problem with a sensor in the car that checks how much oil is in the engine. It's like a little helper that tells the car if it has enough oil to keep running smoothly.
The P055A code indicates that the Engine Control Module (ECM) has detected a malfunction in the circuit of the engine oil pressure sensor or switch labeled 'B'.
The Engine Oil Pressure Sensor/Switch B is responsible for monitoring the engine's oil pressure and sending this information to the ECM. When the ECM detects a fault in this sensor's circuit, it triggers the P055A code. This can be due to a faulty sensor, wiring issues, or a problem with the ECM itself.
• Check Engine Light is on
• Erratic oil pressure gauge readings
• Engine performance issues
• Faulty oil pressure sensor/switch B
• Damaged or corroded wiring or connectors
• ECM malfunction
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Visually inspect the oil pressure sensor and its wiring.
• Test the sensor with a multimeter for proper operation.
• Replace the faulty oil pressure sensor/switch.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regularly check and maintain engine oil levels.
• Inspect wiring and connectors for damage.
• Schedule regular vehicle maintenance.
Sensor Issue
• Have the vehicle inspected by a professional mechanic.
• Do not ignore the Check Engine Light.
Check with your vehicle manufacturer for warranty coverage on sensors and related components.
The P055A code has been a common issue in vehicles with advanced engine monitoring systems, particularly in models from the mid-2010s onward.
Moderate – It is advisable to address this issue soon to prevent potential engine damage.
Ignoring this code may lead to engine damage. Ensure repairs are conducted by a qualified professional.
• Engine at operating temperature
• Stable idle conditions
The engine oil pressure sensor is typically located near the oil filter or on the engine block.
Q: Can I drive with a P055A code?
A: It's not recommended to drive for extended periods with this code, as it could lead to engine damage.
Q: How do I reset the Check Engine Light after fixing the issue?
A: You can reset the light using an OBD-II scanner or by disconnecting the battery for a few minutes.
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