Error Code P06A8: What It Means & What To Do?

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When you find that your vehicle has set the OBD Error code P06A8, it basically means that the Powertrain Control Module or the PCM module has noted some issue with the reference voltage signal or a performance issue with a specific sensor (given designation ‘C’). This sensor is usually associated with the automatic transmission, transfer case or even one of the differentials.

The Engine Control Module or the ECM module sends out a 5-volt reference signal. This is sent to all the applicable engine sensors. After doing so, if the PCM sees an issue with this signal, then it will proceed and set the error code P06A8.

What causes this problem with the Sensor Reference Voltage C Circuit Range/Performance?

• A sensor that's not performing well
• Defect in the blown fuses and/or fusible links
• System power relay malfunctioning
• Any open circuits and/or connectors

1. PCM - Replace with superior quality PCM from Parts Avatar.
2. Sensor - Try to repair them, if that doesn’t work, order online at Parts Avatar and receive delivery at your doorstep in just few days.
3. Engine Connectors - If repairing doesn’t help, easily buy online and avail free shipping on order over CAD $99.

Willing to know some common symptoms of OBD Code P06A8? Your wish is our demand. Have a look at them below:

Common Symptoms

• Transmission not shifting between sport and economy modes
• Malfunction in the shifting of transmission
• Slow or no transmission engagement found
• Failing of the transmission to switch between all-wheel and two-wheel drive modes
• Failing of the transfer case in shifting from low to high gear
• Ba front differential engagement
• Faulty front hub engagement
• Erratic or inoperative behavior observed in the speedometer/odometer

We have listed out some ways which would help you to correct the occurrence of OBD Code P06A8. They are mentioned here as follows:

• Repair and Replace the PCM
• Repair and replace the Engine connectors if needed

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of PCM, Sensor, Bad Sensor, Connectors and many more. Now all your problems would vanish within no time.

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

Procure and consult your vehicles information source and determine the location as well as the function of the sensor in question. This will enable you to have clarity on what you are looking for in terms of malfunctioning or abnormalities. Perform a visual inspection first, to check if there are any damages to the sensor system and the wires, harnesses and connectors related to it, repair them if they are damaged, you may find burned wiring, or connectors or components too. 

The next step is to connect your scanner to the vehicle's diagnostic port. Retrieve all the codes stored in it, and freeze frame data. Ensure you note them all down in the order as well, this will enable you to understand if the code is intermittent. Now, you can simply clear all of them, and take your vehicle on a test-drive. Be observant of the code resetting.

While on test-drive if you notice that the code immediately resets, then using the DVOM test the reference voltage and ground signals at the sensor. Expect a 5 volt and a ground at the sensor connector. In-order to understand how off, the voltage is you will have to refer the vehicle information source. If voltage as well as ground signals are present at the sensor connector then continue testing the sensor resistance and also level of continuity. If these don’t comply to your manufacturers, then replace the sensors.

Common Mistakes When Diagnosing the P06A8 Code

• Failed Engine sensor
• Failure of Powertrain Control Module or PCM
• Issue in the wiring