Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part of the car that helps move the transmission fluid. It's like a sensor that checks if the pump is working right, and it's saying something's wrong.
The P1A6B code indicates an issue with the voltage sensor for the U phase of the electric or auxiliary transmission fluid pump motor.
The P1A6B code is triggered when the vehicle's powertrain control module (PCM) detects an abnormal voltage reading from the phase U voltage sensor of the electric or auxiliary transmission fluid pump motor. This sensor is responsible for monitoring the voltage levels to ensure the pump operates efficiently.
• Check engine light is on
• Transmission may not shift properly
• Unusual noises from the transmission area
• Faulty voltage sensor
• Wiring issues or poor connections
• Malfunctioning transmission fluid pump motor
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the voltage sensor for proper operation.
• Replace the faulty voltage sensor.
• Repair or replace damaged wiring or connectors.
• Replace the transmission fluid pump motor if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$200 - $500
Moderate
• Chevrolet Volt
• Toyota Prius
• Ford Fusion Hybrid
• Regular maintenance of the transmission system
• Routine checks of electrical connections
• Timely replacement of worn-out components
Sensor Issue
• Do not ignore the check engine light.
• Have a professional mechanic inspect the vehicle.
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
Check with the vehicle manufacturer for warranty coverage on the transmission system.
This code has been associated with hybrid and electric vehicles where electric transmission fluid pumps are used.
Moderate – It's important to address this issue to prevent transmission problems.
Driving with a faulty transmission can lead to safety issues. Ensure repairs are conducted promptly.
• Vehicle must be in a safe location with the engine off.
• Ensure the transmission fluid is at the correct level.
The sensor is typically located near the transmission fluid pump, which is part of the vehicle's transmission system.
Q: Can I drive with a P1A6B code?
A: It's not recommended as it may cause further damage to the transmission.
Q: How do I reset the P1A6B code?
A: After repairing the issue, use an OBD-II scanner to clear the code.
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