Skip the auto shop - Our mechanics make house calls

Q: Car shifts if I drive at a slow rate of speed. Won't if I drive a little faster. Speedo works, transmission issue or speed sensor?

asked by on

The car shifts easier when driving slow, once I drive normal it has a harder time shifting if it does at all, I've herd of its a bad sensor the speedometer would flicker or not work but my speedo works just fine. Check engine light popped up I got a code read for PO715 (turbine shaft speed sensor) some tell me to replace speed sensor others say to replace transmission. I need help finding out which step to take. Only reason I assume it may not be speed sensor is because everyone is telling me the speedometer wouldn't work if that was the case. Is it still possible if the issue is the sensor even though my speedometer works correctly?

My car has 186000 miles.
My car has an automatic transmission.

A: There is a technical bulletin from the manu...

There is a technical bulletin from the manufacturer to replace the powertrain control module and then re-testing the vehicle to see if the problem continues. If it does then try and flush out the transmission and if the problem still continues then replace the transmission. The bulletin seems to suggest taking a trial and error approach to find which part of the transmission is failing. The transmission is most likely slipping internally and this is the reason for the code. If you need assistance with this, a certified technician from YourMechanic can come to your home or office to diagnose you gear shifting issue.

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 clutch pedal is extremely "light" and gears won't go in.

There are a few possibilities; you either have a problem with the hydraulics, a mechanical problem with the clutch, or a transmission fluid leak. Hydraulics: When you push down the clutch pedal, the clutch master cylinder (CMC) uses...

Q: 2001 Honda Accord, Rattle Noise from Under the Car.

Hi there. It is very possible that the rattling noise is an exhaust bracket that has come loose which might be the source of the rattle noise. If your vehicle doesn't shake, vibrate or is having any negative driving symptoms,...

Q: inner Cv axle wont come out?

You will need to get the axle removal tool at a parts store and hook it to a heavy duty slide hammer. Give it some good raps with the slide hammer with the tool behind the axle joint. This should...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...