Error Code P06A4: What It Means & What To Do?

<<See All OBD Codes

This error code is about the engine not starting. In this the Engine Control Module (PCM/ECM) emits a 5-volt reference signal, this is sent out to all applicable engine sensors. Upon sending this signal, if the PCM notices an issue with it, then it will proceed to set the P06A4 OBD error code.

Powertrain control module or PCM module/ ECM module is the central processing unit of your vehicle. It sends out signals to test the other engine sensors, when it sends out a reference signal of 5 volts and doesn’t receive appropriate response it will set the OBD error code P06A4.

What causes this problem with the Sensor Reference Voltage "D" Circuit Low?

• Open or shorted connectors or circuits in the system
• Fuses and/or fusible links are faulty or blown
• Malfunctioning system power relay
• Poor sensor

1. PCM - Repair the damaged if they are repairable, otherwise buy a new PCM from Parts Avatar.
2. Engine Sensors - Need to function perfectly, repair or replace with us online, we offer free shipping on order over CAD $99.
3. Fuses - These definitely require replacement, purchase superior quality fuses only for your vehicle.
4. Switch Circuit - Check for repair possibility, or simply buy online and have it delivered to your doorstep by Parts Avatar, we deliver all across Canada.
5. Tuning Valve - Get it checked for repairs otherwise replace it.

We at Parts Avatar Canada care for our customers, and that’s why we will help you to diagnose P06A4 code by listing out some major symptoms. They are mentioned below as follows

Common Symptoms

• Failed transmission unable to shift between economy and sport modes
• Malfunctioning in the sifting of transmission
• Slow or delayed engagement by the transmission
• Transmission switch fails to switch between drive modes (all-wheel and two-wheel)
• Unable to transfer case to shift, from low to high gear
• Differential engagement is lacking
• Front hub engagement is missing
• Unusual, erratic or inoperative speedometer/odometer

Want to correct the Trouble Code P06A4? Read these points mentioned below:

• Repair or replace any blown fuses
• Repair or replace the ECM/ PCM
• Repair or replace switch circuit

Parts Avatar Canada is here to solve all your issues related to car parts. We have stocked a wide range of best priced Sensor Reference, PCM, Engine Sensors, Blown Fuses, Switch Circuit, Tuning Valve and a lot more to help you out in fixing your car.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P06A4 code to be stored:

Start off by getting hold of your vehicle information source, this will enable you to determine the location and the function of the sensor. This is important so that you can find the right parts based on the model, and year of making of your own specific vehicle. Now, perform a visual check of the sensor system, and wiring harnesses and connectors related to it. Any burned or damaged wiring will have to be either repaired or replaced at this point. Even if needed change the damaged components too.

Connect the scanner, to the diagnostic port of your vehicle to retrieve all the trouble codes stored. Freeze frame the data and make a note of them too. Ensure when noting them, you go in the order that they were stored, this will come very handy. This will help you rule out if the code is intermittent. Now that you have made notes of the codes, you can confidently clear them from your vehicle, and take it for a test-drive and check if the code is immediately reset.

If you note that the code is immediately reset, you will have to now use a DVOM, to test reference voltage and also the ground signals of the engine sensor. The target is to expect 5-volt power and a ground sensor connector. If you notice that there are ground signals as well as voltage at the sensor connector, then continue to test the sensor resistance and its continuity levels. For this you will have to refer our vehicle manual to compare the findings you have with the optimum ones mentioned by your vehicle manufacturer. Disconnect all the related controllers from the system circuits now and then test resistance with the same DVOM. Check if the reference voltage is in sync with your findings and use the DVOM to check circuit resistance and its continuity between the sensor and the PCM module. You will now have to either repair or replace the necessary circuits as per the extent of damage and need.

Common Mistakes When Diagnosing the P06A4 Code

• Failed engine sensor
• Failed Powertrain Control Module (PCM)
• Problem with the wiring