P071A OBD Error Code: Problem & Solutions
OBD Code P071A - Transmission Mode Switch "A" Circuit
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.
The trouble code P071A can be defined as Transmission Mode Switch "A" Circuit
Learn More About OBD Error Code P071A
It
is the engine control module which gives an illumination in the malfunction
indicator lamp when a P071A trouble code triggers up. The P071A transmission
mode switch A circuit code would trigger up when the ECM (Engine Control
Module) and/or the TCM will detect a general fault in the "A"
transmission mode switch or the circuit.
What causes this problem with
the Transmission Mode Switch "A" Circuit?
- There
can be some defects in the mode switch
- Corrosion
caused because of high resistance
- Issue
of frayed, open, short to power, short to ground, etc wiring
- Faulty shift lever transmission control module issue
- Inaccurate fuse/box
Replace/Repair These Parts To Fix Code P071A
- Body Control Module
Component
- Did
your mechanic just found out that there is some fault in the Body Control Module Component?
Buy top notch Body Control
Module Component from us at economical prices.
- Auto Transmission
Control Module - A broken Auto
Transmission Control Module can cause a lot of issues. It would be nice
if you get it replaced on time.
- Engine Control
Module - Everything is fine with the Auto Transmission Control Module and still OBD code
P071A flashing? Then there is definitely some fault with the Engine Control
Module. Get it checked and replace if needed.
- Electronic Control Unit - Electronic Control Unit is an important car part which should never be neglected. May be there is some fault in it due to which P071A code may start flashing.
- Powertrain Control Module - A faulty Powertrain Control Module can be troublesome. You can always rely on us as we have best auto parts for our customers.
Symptoms Of OBD Error Code P071A
Our
main motive is to achieve customer satisfaction as for us our customers are
everything and that’s why we will help you to diagnose P071A code by mentioning
some major symptoms below:
Common Symptoms
- Mode
switch might be inoperative
- Issue
of erratic or abnormal switch operation
- Incompetent
shift pattern
- There can be less power under heavy load/towing
- Not downshifting when torque is needed
How To Correct P071A Transmission Mode Switch "A" Circuit
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 P071A:
- 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
- If
you find out that there are some faults in the body control module component,
then it should be replaced
- Make
sure that you get the auto transmission control module replaced
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Easy Diagnosis Of Engine Error OBD Code P071A
Here
are some steps which you should follow in order to diagnose this fault code:
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.