Q: Automatic transmission not shifting properly.

asked by on

My automatic transmission will only shift into reverse or first gear.

The computer on these cars are prone to interference if the owner has put on an aftermarket code scanner to the ALDL connector to scan the computer. Some owners use these to monitor system functions or for other reasons. These aftermarket testers have been known to cause many problems with the computer or components in the car like transmission, ABS, Engine and other items that require use of the communication lines that this aftermarket tester also uses. Try to remove the tester and restart the engine and road test for problem to be fixed. I recommend to have a qualified mechanic check it out such as one from YourMechanic.

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. Automatic transmission not shifting properly.

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: Can I go to a trip through the state with the following problems with my car?

You should ask the shop that gave you the estimate since they quoted you to replace the transaxle. The transaxle problem may be something that could leave you stranded and cost thousands of dollars to replace this part. The car...

Q: Temperature fluctuates up and down

The coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time or...

Q: I have a honda odssey the message appear chek fuel cap.I change the new cap still the same message appear

You will need to have the computer checked for codes since a leaking in the fuel vapor system can cause the vehicle to think the cap is leaking. You may have a bad or leaking vapor vent or purge valve....

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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.
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.