Skip the auto shop - Our mechanics make house calls

Q: Can't do case relearn due to the scan tool not recognizing its in park. Gear indicator goes out on PN31. Changed nss no change.

asked by on

Can't do case relearn due to the scan tool not recognizing its in park. Gear indicator light goes out on PN31. The light on PARK is on when i first start the truck. Goes out 3 seconds later. Flashes when i pass NEUTRAL, but not if i stop on it.Changed nss no change. Also changed instrement cluster with no change. Plz help. Thank you.

My car has 88000 miles.
My car has an automatic transmission.

A: Disconnect and check the ECM and switch con...

Disconnect and check the ECM and switch connector on the transmission. Make sure the connectors are clean and free of any corrosion and apply dielectric grease to the connections. The harness and connections are known to get fretting corrosion that can cause intermittent loss of connection and cause various problems in the electrical systems. You may have to do this for all of the modules in the vehicle to correct the condition.

I'd consider getting assistance from a professional mechanic, they will be able to diagnose these electrical issues firsthand and fix it accordingly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Fuel pump not working

Hi. A vehicle that cranks normally but doesn't start indicates a problem with fuel or spark delivery. On the other hand, and engine that doesn't cranks at all or cranks slowly indicates a problem with the starting or charging system....

Q: passlock

Hello. This is a common issue on this vehicle. It may be caused by an ignition switch, but most of the time when you get the issues you are describing it is because of the body control module. I typically...

Q: Engine knocking

This engine has had known issues with the timing chain and tensioners. This may be the issue for your engine, but it would need to be heard by a mechanic to get a complete diagnosis. I recommend you seek a...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...