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 the electrical part that helps pump fluid in the car's transmission. It's like when a toy's battery is too strong and makes it act funny.
The P1AAD code is triggered when the powertrain control module (PCM) detects a high voltage condition in the circuit that controls the electric or auxiliary transmission fluid pump relay.
The P1AAD code indicates that the PCM has detected an abnormally high voltage in the control circuit of the electric or auxiliary transmission fluid pump relay. This could be due to a fault in the relay, wiring, or the PCM itself.
• Check Engine Light illuminated
• Transmission may not shift properly
• Possible overheating of the transmission
• Faulty transmission fluid pump relay
• Wiring issues such as open or short circuits
• Faulty PCM
PCM: Powertrain Control Module
Relay: An electrical switch that opens and closes under the control of another electrical circuit
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the transmission fluid pump relay for proper operation.
• Replace the faulty transmission fluid pump relay.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Relay tester
$100 - $500
Moderate
• Chevrolet Volt
• Cadillac ELR
• Opel Ampera
• Regularly inspect and maintain wiring and connectors.
• Ensure the transmission fluid is at the correct level.
• Follow the manufacturer's maintenance schedule.
Electrical Circuit Issue
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult a professional mechanic for an accurate diagnosis.
Check with the vehicle manufacturer for warranty coverage on the transmission or electrical components.
This code is commonly associated with hybrid or electric vehicles that use electric pumps for transmission fluid circulation.
Moderate – It should be addressed soon to prevent potential transmission damage.
Driving with this code can lead to transmission damage, which may affect vehicle safety.
• Vehicle in park or neutral
• Engine running
The transmission fluid pump relay is typically located in the vehicle's fuse box or near the transmission.
Q: Can I drive with a P1AAD code?
A: It's not recommended as it may lead to transmission damage.
Q: How can I reset the P1AAD code?
A: Fix the underlying issue and use an OBD-II scanner to clear the code.
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