Guide To P071B OBD Error Code Solutions

<<See All OBD Codes

The fault code P071B can be defined as Transmission Mode Switch "A" Circuit Low.

The Tow/Haul Switch will enhance the transmissions shifting for towing. Now if the switch is not functioning properly, then the P071B trouble code would be set up and towing mode will be disabled. On most vehicles this switch is part of the shift lever.

Want to learn something more about this fault code?

This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model.

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

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

1. Auto Transmission Control Module - A faulty Auto Transmission Control Module can be troublesome. You can always rely on us as we have best auto parts for our customers.
2. Body Control Module Component - If everything is alright with PCM, then there is surely some defect in Body Control Module Component. Get it replaced before the situation gets worse.
3. Engine Control Module - P071B code can display due to some issues in the Engine Control Module. So, it is very important to replace the Engine Control Module with us at equitable prices.
4. Electronic Control Unit - Do you remember when was the last time you got your car Electronic Control Unit checked up? A dirty Electronic Control Unit can cause a lot of issues like displaying P071B code.
5. Powertrain Control Module - Are there some faults in your Powertrain Control Module? Don’t waste time and get them replaced or else P071B code can turn up.

There could be countless symptoms which that would accompany with this fault code. Willing to know some common symptoms of OBD Trouble Code P071B? Your wish is our demand. Have a look at them below:

Common Symptoms

• Mode switch may not be functioning properly
• Decreasing power under heavy load/towing
• Issue of not downshifting when torque is needed
• Unusual switch operation
• Shift pattern might be incapable

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:

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

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range 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 a lot more. We are sure that now all your issues would be resolved.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P071B code to be stored:

• 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.