Error Code P071D: What It Means & What To Do?

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This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another.

This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

The fault code P071D can be defined as Transmission Mode Switch "B" Circuit. The Tow/Haul Switch will enhance the transmissions shifting for towing. Now if the switch is not functioning properly, then the P071D trouble code would be set up and towing mode will be disabled. On most vehicles this switch is part of the shift lever.

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

• Corrosion caused because of high resistance
• Defects in the wiring
• The shift lever transmission control module might have some flaws
• Fuse/box not functioning properly
• There can be some defects in the mode switch

1. Engine Control Module - There can be some issues with the Engine Control Module due to which you may see P071D code appearing over and over again. Visit us to buy best quality Engine Control Module online.
2. Powertrain Control Module - A lot of issues can arise do to defective Powertrain Control Module. Did you just see P071D code flashing? Now you know the reason why it is appearing. Get it inspected and replaced on time.
3. Electronic Control Unit - Faulty Electronic Control Unit can be the reason why P071D code is flashing. Visit us to purchase top notch Electronic Control Unit online.
4. Body Control Module Component - It is an important auto part which needs full care. A faulty Body Control Module Component can be a reason behind the flashing up of P071D code.
5. Auto Transmission Control Module - There can be some issues with the Auto Transmission Control Module due to which you may see P071D code appearing over and over again. Visit us to buy best quality Auto Transmission Control Module online.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• Unusual switch operation
• Not downshifting when torque is needed
• Incompetent shift pattern
• Mode switch may not be functioning properly
• There can be less power under heavy load/towing

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• Carefully replace the defective electronic control unit
• You can always replace the malfunctioning body control module component
• The defective engine control module should be replaced or repaired as per the need
• Restore the faulty electronic control unit
• The malfunctioning powertrain control module should be repaired

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:

• The starting point would vary depending on 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.