Q: When I put my 2006 Chevy Impala LT into drive or reverse it cuts off I'm wondering what could it possibly be

asked by on

When I try to put my 2006 Chevy Impala into drive or reverse it shuts off I'm wondering why it's doing this

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

Stalling when the vehicle is put in gear simply occurs if the engine cannot accommodate the load. Among the causes of that are problems with the torque converter and/or torque converter lock up solenoid. Another possibility is an internal hydraulic leak in transmission seals causing pressure to apply both reverse and forward gears at the same time, lock up the transmission and stall the engine. Pressure testing (external gauges) can be used to see if such a leak is caused by a leaking seal or a leaking reverse or forward solenoid/valve.


Another possible cause relates to engine controls. A mechanic can test the throttle position sensor, idle control valve as well as the manifold absolute pressure (MAP) sensor. The MAP sensor detects engine load and generates a signal that is proportional to the amount of vacuum in the intake manifold. The ECU uses this information to adjust ignition timing and fuel enrichment relative to the amount of power needed. When the engine is working hard, intake vacuum drops as the throttle opens wide and the engine takes in more air, which requires more fuel to keep the air/fuel ratio in balance. When the computer reads a heavy load signal from the MAP sensor, it adjusts the fuel mixture to slightly more rich than normal so the engine can produce more power. The computer will then retard (back off) ignition timing slightly to prevent detonation (spark knock) that can damage the engine and decrease performance. IF the MAP sensor is faulty, this foregoing sequence may explain why the engine dies as you put the vehicle into gear as a load is put on the motor.


YourMechanic offers a stalling diagnostic which covers both transmission and engine related faults. If you request that service a certified Mechanic, dispatched by YourMechanic right to your location, will get this problem resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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. When I put my 2006 Chevy Impala LT into drive or reverse it cuts off I'm wondering what could it possibly be

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: No power new alternator. 1974 Chevrolet Chevelle

Hello. Thanks for writing in about your 1974 Chevrolet Chevelle. If you got a spark from the wire on the back of the alternator, then you shorted something out. You need to follow the wire from the alternator to where...

Q: Car takes time to start and service engine soon light is on

Hi Andres. Thanks for submitting your question today. There are several reasons why your Nissan might be experiencing these symptoms. Most of the time, a hard start is caused by a restriction of fuel or ignition timing problems. This could...

Q: What's the proper engine operating temp for a 98 dodge dakota 3.9l?

Normal operating temperature for an engine ranges from around 200 to 220 degrees. For some reason your engine must not be getting warm enough. I would recommend using the thermostat that the manufacturer recommends in order to keep the engine...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.