Q: Car decelerating to complete stop

asked by on

The Wrench light comes on. When this happens, the car decelerates to a complete stop.

Hi. The light you are referring to is the powertrain malfunction warming light. This light will illuminate whenever the control module determines there is a fault in the system. There are many reasons this light might come on. However, there are a couple of sensors inside the transmission that commonly fail and turn on the malfunction light. These are the output shaft speed sensor (OSS) and turbine shaft speed sensor (TSS). If these parts are indeed the problem, there will be corresponding diagnostic trouble codes (DTCs) stored in the modules memory. These codes can be retried by a technician with a scan tool. There is also a technician service bulletin (TSB) regarding the failure of these sensor. It is number 07-21-11.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Car decelerating to complete stop

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: Thrust angle alignment

A thrust angle alignment, which I will explain momentarily, is a mundane, routine alignment procedure which is in fact performed every time a vehicle has a 4 wheel alignment. A quick digression though: I am surprised to hear that it...

Q: Electronic gear box system issues

Hello. It sounds like there is an electrical problem with the gearbox or internal components of the gear box. This is a dangerous problem, and until it is repaired, it is unsafe to drive your vehicle. For this type of...

Q: Brake lights still work, though tail lights and dashboard lights do not.

It could be that the dash and taillights share a common fuse. This could be determined by looking at the fuse information in your owner's manual. One important thing to remember is that fuses don't blow for no reason -...

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...
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...