P071C - OBD Trouble Code

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P071C error code can be defined as Transmission Mode Switch "A" Circuit High. All the sensors as well as switches which are involved in the operation of the transmission are monitored by the transmission control module. These days the automatic transmissions provide a lot more comforts which were not there before. The cruise control is controlled and at the same time monitored by the TCM.

Do you want to gain some more knowledge about the P071C trouble code?

The transmission control module (TCM) monitors the transmission mode switch signal. The TCM sets the OBDII code when the transmission mode switch is not to factory specifications.

What causes this problem with the Transmission Mode Switch "A" Circuit High?

• The mode switch might be quirky
• Issue of corrosion which might cause high resistance
• Faults in the wiring
• Malfunctioning shift lever transmission control module issue
• There can be incorrect fuse/box

1. Electronic Control Unit - Do you remember when was the last time you got your car Electronic Control Unit checked up? A defective Electronic Control Unit can cause a lot of issues like displaying P071C code.
2. Engine Control Module - Poor Engine Control Module can cause a lot of difficulties, so why not get it replaced at time?
3. Body Control Module Component - Are there some faults in your Body Control Module Component? Don’t waste time and get them replaced or else P071C code can turn up.
4. Auto Transmission Control Module - Everything is fine with Engine Control Module and still P071C code triggering? Then you must get your Auto Transmission Control Module checked.
5. Powertrain Control Module - There can be some issues with the Powertrain Control Module due to which you may see P071C code appearing over and over again. Visit us to buy best quality PCM online.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P071C code by mentioning some major symptoms below:

Common Symptoms

• Unsuitable shift pattern
• Diminishing power under heavy load/towing
• Not downshifting when torque is required
• Non-functional mode switch
• The switch operation might be irregular

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P071C:

• Restore the faulty electronic control unit
• Make sure to restore the faulty powertrain control module
• Carefully replace the defective electronic control unit
• If you find out that there are some faults in the body control module component, then it should be replaced
• The defective engine control module should be replaced or repaired as per the need

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 Tcm, Multimeter, Code Scanner, Bcm, Fuse Box, Obd Reader, Car Diagnostic Tool, Car Scanner, Obd2 Car Scanner, Fuse Block, Bluetooth Obd2 Reader, Automotive Code Reader and many more. Now all your problems would vanish within no time.

Here are some steps which you should follow in order to diagnose this fault code:

Just keep in mind that the initial start point would surely be different as it all depends upon what tools/references you have at your disposal. If your scanner has any monitoring capabilities, you may be able to monitor the values and/or operation of your particular mode switch. If it is so, then you should toggle the switch on and off to see if your scanner recognizes your inputs. There may be a lag here so a few seconds delay would be a good idea when the switches are being monitored. But if you find the mode switch is not functioning properly according to your scanner, you may be able to jump some pins at the mode switch connector to rule out the circuit.

If the circuit is ruled out in this manner, and the switch is still inoperative, then move on to testing the switch itself. These are general guidelines but with a moderately able scan tool, troubleshooting CAN be pain-free if you know what you're looking for. You can always refer to the service manual for specs/procedures. Then you should test the switch. Many a times these switches are just to signal to the appropriate modules (e.g. TCM, BCM (Body Control Module), ECM, etc.) your towing/load needs so it can implement modified shift patterns. A lot of these are on/off style. This means, that a simple continuity test with an ohmmeter can determine the functionality of the sensor. Now, these sensors are sometime incorporated into the shift lever so make sure to research which connectors/pins you need to monitor with your multimeter