Q: Car jerks when shifting gears, check engine light

asked by on June 03, 2016

I need help. For the last couple weeks, when my car is in motion, it jerks when it shifts gears, then it goes into limp mode. I can't change gears with the autostick, and the car feels very sluggish. I usually fix this by pulling over, turning the car off, and back on. Now I'm starting to get check engine lights. The computer says codes p0700 (transmission control system malfunction) and p2767 (No input speed sensor signal). I've heard this is a common problem. Do I need to just replace the input transmission speed sensor? What else could it be?

There are more tests that need to be done before the speed sensor module is replaced. There are about 20 tests that need to be done to verify the number turbine speed sensor is not working properly. These tests are very specialized, and only a dealer trained transmission technician with specialized equipment could diagnose the problem for you. I would recommend having a dealer mechanic diagnose the problem and replace the transmission electrohydraulic control unit as an assembly if it is testing bad. This is internal part of the transmission and requires removal of the transmission fluid and pan for access.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Car squealing when I add water to the radiator
The noise you are hearing is cold water hitting hot metal and turning to steam, like a steam whistle. You may have an intake or head gasket leaking where the head and intake meet in the front, or back, of...
No cold air from AC
If the AC is only blowing hot air then most of the time it is because the AC compressor is not turning on. The compressor will not turn on for a number of reasons, but the most common is low...
when a/c is on car drives really slow
Hi there, and thanks for writing in. It's hard to give a specific answer without having any information regarding your exact make and model, but this problem in general sounds like something that should be diagnosed (https://www.yourmechanic.com/services/car-is-slow-to-accelerate-inspection) by a qualified...
Check engine light on - 2005 Mercedes-Benz SLK350
Have a mechanic check the code(s), then diagnose the vehicle based on that information. The problem setting the Check Engine Light may be doing other, unseen and expensive damage. A YourMechanic professional can help diagnose this issue by giving your...
Changed camshaft sensor but car still won't start, could it be the crankshaft sensor?
Hello, thanks for writing in. Most of the time, this code comes up when there is a difference between the crank and cam sensors. The most common failure is the crankshaft position sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-crankshaft-position-sensor). These fail much more frequently (https://www.yourmechanic.com/article/how-long-does-a-crankshaft-position-sensor-last)...
Intake maifold runner control is stuck open
Hello, thanks for writing in about your 2001 Mazda Miata. Due to this trouble code, the intake manifold runner control will need to be replaced. If this is not done you can cause serious damage to your car. If you...
How long can I leave my truck sitting without it being plugged in before the diesel starts to gel up? Its currently 15 Degrees
To be blunt, there is no specific number that we can give you. You have to understand that diesel fuel gels in colder climates due to the amount, and types, of paraffin wax that is used in the manufacture of...
p241a read on scanner.
Hi there. Check the plugs on the O2 sensors and see if they are swapped. This will cause the fault code to come on. If the wiring is correct, then the wiring could have a break in it on the...
I have a rubbing noise when i turn the wheel when sitting still but not at speed and i also have a lot of clunk noise over bumps.
Hi William. Thanks for contacting us today. Based on what you've indicated, it's quite possible that there could be multiple front end issues going on with your Saturn. The fact your CV boots are torn could indicate a failure of...

Related articles

2011 Dodge Ram vs. 2011 Ford F-150: Which One Should I Buy?
Large trucks can be fun to drive, and even more fun to get dirty. Unfortunately, they may also cause you to get phone calls from friends who need to move into a new apartment. Fortunately, just having a truck may...
The Best Used Cars to Buy For a Graduation Gift
Your Your little bundle of joy has grown up and on the cusp of entering adulthood. Graduating is a milestone, and you want to reward their hard work and show how proud you are. Buying a used car is a...
P0424 OBD-II Trouble Code: Heated Catalyst Temperature Below Threshold (Bank 1)
Trouble code P0424 means the catalytic converter is not working efficiently, detected when oxygen storage has decreased.