Q: Around 2000 rpm, car shifts erratically from 4 to 3 gear, code comes up as Bad Shift Solenoid C

asked by on

If I reset CEL and keep truck around 2000 rpm, it shifts and maintains speed fine, however as I go above said rpm the trans drops out of fourth into third, then if I let off the throttle it will shift back to fourth. If I don't let off throttle, the truck stays in third and the CEL comes on, and the code says shift solenoid c is faulty. I replaced the solenoid, filter, and fluid but it still does same thing. It was a good runner until that popped up out of nowhere, what could it be? It's hard to keep those speeds while on the expressway. Please help, thank you!

My car has 179546 miles.
My car has an automatic transmission.

Hi there, thanks for writing in. Based off your details, you could possibly have a problem with the transmission front pump seal that will not let the lock up torque converter go into overdrive, and may set codes for overdrive. The possible code is P0628 or P0741. I recommend having the front pump seal inspected, and if it’s damaged, replace front pump and converter.

If you’d like help with this issue, consider having one of our certified mechanics come to your home or office to inspect and diagnose this issue for 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. Around 2000 rpm, car shifts erratically from 4 to 3 gear, code comes up as Bad Shift Solenoid C

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: I'm am having issues with my truck when I get on the freeway. I can't go past 40 mph on the freeway.

Hi there. The EGR (exhaust gas reciculation) Valve needs to removed and cleaned out. If the engine continues to not drive faster than 40 mph, then I recommend replacing the EGR valve. If you need further assistance with your vehicle...

Q: Single out fuel issue

It may be difficult to determine without knowing the symptoms you are experiencing with the vehicle. If you can hear the fuel pump coming on, this suggests that it is not likely the relay causing the problem. If there is...

Q: Q: Car won't go into gear.

We would first have to know if the vehicle is an automatic or manual transmission, and the exact nature of the problem. For both transmissions, there is a wide variety of reasons as to why the vehicle would not shift...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.