Guide To P0A03 OBD Error Code Solutions

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Does your vehicle’s engine overheat? Are there any issues of an open or short circuit in the electronics coolant temperature sensor? Then there is a high probability that the P0A03 error code is stored in your vehicle. If the vehicle’s engine overheats, then this error code will be stored in your vehicle.

The temperature of the cooling system, which each hybrid system owns, is carefully operated by the motor electronic coolant temperature sensor. The P0A03 error code will be stored in your vehicle if there is an incorrect signal detected by the powertrain control module (PCM). The engine control unit (ECU) which manages the power control identifies the coolant temperature which uses high voltage along with the coolant temperature sensor. This component is built into the inverter along with the converter assembly. The signal from the engine control unit is actually used to check as to how the inverter cooling system efficiently performs. If it is much necessary, the output to the inverter will be limited by the engine control unit so that it can help in avoiding the overheating of the inverter.

What causes this problem with the Motor Electronics Coolant Temperature Sensor Circuit High?

• Malfunctioning of the motor electronics coolant temperature sensor.
• The motor electronics coolant temperature sensor harness has a short circuit or you might find an opening.
• The electrical connection might be poor in the motor electronics coolant temperature sensor circuit.

1. Electronic Control Unit - Is the electronic control unit damaged? Are you looking for a replacement for your faulty ECU? Find them at Parts Avatar at best prices online.
2. Engine Coolant Temperature Sensor - A defective engine coolant temperature sensor has to be changed as soon as possible to avoid further troubles.
3. Variable Camshaft Timing Solenoid - A damaged variable camshaft timing solenoid needs immediate replacement so that you can avoid the P0A03 error getting stored.
4. Cylinder Head Gasket - Carefully inspect the cylinder head gasket for any damages or possible faults. If you find them defective, change them as soon as possible.
5. Powertrain Control Module - The best idea to get rid of the P0A03 error code is to quickly replace the defective or broken powertrain control module.
6. Engine Wires - Carefully inspect the wires for any damages or possible faults. If you find them broken, find the right replacement for the engine wires from Parts Avatar at best prices online.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P0A03 code by mentioning some major symptoms below:

Common Symptoms

• Overheating of the vehicle’s engine.

Want to correct the Trouble Code P0A03? Read these points mentioned below:

• Change the radiator fan assembly.
• The water pump needs replacement.

There is no need to be anxious as Parts Avatar – Car Parts Online is here to help you out! We have a high-grade electronic control unit, coolant temperature sensor, variable camshaft timing solenoid, cylinder head gasket, powertrain control module, engine wires, and a lot more for our precious customers.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P0A03 code to be stored:

• You have to measure the voltage by separating the electronic voltage coolant temperature sensor at the wire joint side.
• The power supply mode of the electric motor switch has to be turned on.
• The voltage between the connectors of the electronic voltage coolant temperature sensor and the body earth has to be carefully measured.
• If the voltage is normal, then you have to check the earth line if there is an opening or short circuit to the earth.
• If not so, you have to inspect the signal line for short circuit or an opening and repair its associated connectors as well as wiring harness.
• Now, visually inspect the electronic voltage coolant temperature sensor for any damages or possible faults.
• Replace the damaged engine voltage coolant temperature sensor. You may also, find an erratic signal.
• After replacing each of the damaged electrical components, you have to check the diagnosis code.
• The error code has to be erased.
• The power supply of the motor switch has to be turned on.
• Re-check to see if the diagnosis code is restored.
• After every diagnostic process is carefully done, make sure that you reset the code and test drive the vehicle. This has to be done to see if the error codes still appear.
• This step will eventually help the mechanic or the technician to know if the code is still stored and help him to locate the area as to where the fault occurred.

Common Mistakes When Diagnosing the P0A03 Code

• The coolant temperature sensor which has a high voltage seems to be faulty.
• Defective powertrain control module (PCM).
• Issues with the electrical wires.