A P0A0D engine code indicates that something is wrong with your car’s service plug grip, inverter terminal cover, or frame wire causing an electrical problem. You should look into repairs immediately so that your car’s hybrid system and system main relay can function properly.

An OBD-II is a device that can help you read diagnostic trouble codes (DTCs), like engine code P0A0D. When your Check Engine Light or any other warning light comes on, using an OBD-II to diagnose the problem is a handy way to avoid extra steps (and extra expenses) at the mechanic.

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What does the engine code P0A0D mean?

Definition: High voltage system interlock circuit high

When your car shows a P0A0D engine code, it means that something in your car’s electrical current or wiring is malfunctioning or missing, and your car’s interlock signal line is open.

An interlock is a safeguard against improper usage and operation. An open interlock circuit could stop your car’s high-voltage system from operating or your vehicle from starting altogether.

How much will it cost to fix?

In most cases, repairing engine code P0A0D should cost less than $500. The cost can vary depending on the cause and the hourly rate of your local mechanic. Expect it to take about one hour of labor to diagnose the code, and be ready to budget for any replacement parts.

MORE:

How to know if a mechanic is taking too long with car repairs

What can cause the P0A0D engine code?

Your car shows a P0A0D when a power management control electronic control unit (ECU) detects a triggered safety device. These safety devices live in three locations: the service plug grip, inverter terminal cover, and frame wire. A safety device is triggered when a key component in one of these areas is disconnected or missing.

Here are some possible causes for the P0A0D engine code:

Faulty service plug grip

Faulty frame wire

Faulty inverter terminal cover

Faulty inverter with converter assembly

Inverter with converter assembly is open or shorted

Inverter with converter assembly circuit has a deficient electrical connection

Faulty power management control ECU

MORE: How to troubleshoot basic car problems

Common symptoms of the P0A0D engine code

Your Check Engine Light may be the only symptom accompanying this engine code. Because the P0A0D engine code indicates an electrical problem, other symptoms might include:

High voltage systems not operating

Your vehicle not starting

Although your vehicle should continue driving if a P0A0D engine code is triggered during use, you could experience stalling or trouble starting your engine in the future.

How serious is the P0A0D engine code?

Because this engine code targets your car’s high-voltage system, you should seek repair immediately. Avoid driving your vehicle until repairs have been completed.

A high voltage system is a key feature in

hybrid and electric cars

that helps to optimize fuel economy and performance. Addressing your P0A0D engine code will allow you to operate your car and all of its features safely and properly.

MORE:

How to understand car OBD codes

Can I fix the P0A0D engine code myself?

Fixing a P0A0D engine code requires expert knowledge of mechanical parts and safety precautions to service successfully. This code can be caused by a myriad of hard-to-detect, high-voltage electrical problems. It is in your best interest to seek professional help.

To diagnose the P0A0D cause, your mechanic should complete the following:

Inspect all wiring harnesses and connectors related to the service plug grip, inverter terminator cover, and frame wire

Check for damaged components

Look for bent, broken, pushed out, or corroded connector pins

Once your mechanic knows what’s wrong, they should repair, replace, and/or reconnect the faulty parts to finish servicing your P0A0D engine code.

Key Takeaway Keep yourself safe and give your car the care it needs by finding a professional to fix engine code P0A0D.

MORE:

How to decide if you need mechanical breakdown insurance

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