Skip the auto shop - Our mechanics make house calls

Q: Input turbine speed sensor B has stopped working

asked by on

The car goes into limp mode

My car has 12500 miles.
My car has an automatic transmission.

A: Hello and thank you for your question. It s...

Hello and thank you for your question. It sounds like the input turbine speed sensor B has failed or lost connection to the engine control module (ECM). You will first need to check the wiring to the sensor and see if there is any debris or corrosion at the circuit causing a blockage of power. If the circuit has power and the engine is working well but the transmission is still in limp mode, then the sensor has failed. I recommend replacing the sensor if this is the case. If the sensor has been replaced and the wiring is in good shape, then the ECM has lost its programming or the ECM has failed, in which case the ECM should be flashed or replaced. If you need assistance troubleshooting the input speed to the transmission, then you can always seek out a professional technician, such as one from YourMechanic, to help you with your vehicle.

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

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: My 2001 vw beetle won't go over 20 mph and not shifting.

Hi there. The computer has put the engine into limp mode for a fault that the sensors have picked up. Since the transmission is not shifting, first check the transmission oil level and make sure that its full and red...

Q: Transmission won't shift out of second gear

All three problems may be related. You will have to get the computer scanned to see if you have a bad speed sensor. The speed sensor will sense the speed in which you are going; the computer will use this...

Q: Brake controller plug in

Hi and thanks for contacting YourMechanic. Try looking near or around the rear bumper. Look under the bumper around the frame to see if the factory has coiled up the harness. If you cannot find any harness near the rear...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.