Q: Transmission doesn't shift, gets stuck in fail safe mode.

asked by on

The truck shifts normally until it is driven 10 - 15 miles , then when I restart it and go it doesn't shift. I read online that it is going into a " fail-safe" mode. It will move and reverse is good , just seems like it is stuck in 2nd gear. HELP!!!!! Thank You

My car has 158000 miles.
My car has an automatic transmission.

Depending on the circumstances, it may in fact be in "fail-safe" mode. When this happens you will normally also have a Check Engine Light on which will usually cause fault codes to be registered in the ECU. When the vehicle goes into safe mode, this is done by the ECU in order to prevent further damage to the failing part or component (whatever that may be). You will need to have the truck hooked up to a scanner to download these codes to further narrow down the problem. To avoid any unnecessary repairs, I would recommend having an expert from YourMechanic come to your home to perform a diagnostic check on your shifting issue.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Transmission doesn't shift, gets stuck in fail safe mode.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Overheating and cutting off while driving

If the engine is overheating to the point where it's shutting off and blowning coolant out of the tailpipe, you have a bad situation. A failed distributor or cracked coil may cause the engine to stall when warmed up. Consider...

Q: Plan on buying a 2007 impala SS with 124,000 miles on it. Would that be a good purchase?

Hi there. When it comes to buying a pre-owned vehicle, it is best to perform a pre-purchase inspection to make sure that the engine, transmission, drivetrain, and suspension is all in order and working condition. Also it is best to...

Q: Stalling problem when a quarter of a gas tank is left

Hello. It sounds to me as if the fuel pump is straining to pump the fuel when it reaches a low point causing a misfire. I suggest that a diagnostic test is performed on the vehicle with the scan tool....

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...