Guide To P071F OBD Error Code Solutions

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P071F error code can be defined as Transmission Mode Switch "B" Circuit High.

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

Willing to learn more about the P071F fault code? Then you have arrived at the right place.

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.

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

• Issue of corrosion which might cause high resistance
• The mode switch might be quirky
• Issue of frayed, open, short to power, short to ground, etc wiring
• Fuse/box not functioning properly
• The shift lever transmission control module might have some flaws

1. Body Control Module Component - The P071F code can also arise due to some issues in Body Control Module Component. So, it is advised to replace them as soon as possible.
2. Powertrain Control Module - Do you remember when was the last time you got your car Powertrain Control Module checked up? A damaged Powertrain Control Module can cause a lot of issues like displaying P071F code.
3. Auto Transmission Control Module - Auto Transmission Control Module is an important car part which should never be neglected. May be there is some fault in it due to which P071F code may start flashing.
4. Electronic Control Unit - Is your Electronic Control Unit damaged or broken? Don’t worry as we have solutions for all your problems.
5. Engine Control Module - Defective car Engine Control Module can be a major reason why P071F code depicts. So, make sure to replace it online so that you don’t have to face any further issues.

Willing to know some common symptoms of OBD Trouble Code P071F? Your wish is our demand. Have a look at them below:

Common Symptoms

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

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 P071F:

• If the engine control module is not working properly, then it should be repaired
• Replace the defective auto transmission control module
• You can always replace the malfunctioning body control module component
• Make sure to restore the faulty powertrain control module
• Carefully replace the defective electronic control unit

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

• Your starting point would always depend upon what tools as well as references you have at the 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.