Q: I had a factory mopar transmission installed & put 1000 miles on it car went into limp mode so I replaced the speed sensors & it f

asked by

Michael A

on January 20, 2018

I had a factory mopar transmission installed & put 1000 miles on it car went into limp mode so I replaced the speed sensors & it fixed it for a month or so. I have now replaced the speed sensors & shift solenoid & trans harness & tested main harness one wire at a time with ohm meter & all check good.I tried another ecm still same problem. What else could it be? Thanks,Michael. My car has 82000 miles. My car has an automatic transmission.

My car has 82000 miles. My car has an automatic transmission. Hi Michael. Thanks for contacting us today. You might want to read these two articles on the P-0888 OBD-II Trouble Code and the P-0700 Trouble Code to learn about the reasons and possible solutions to resolve these two codes. trans relay tested good with 12 volts in & out. all wires & harnesses have tested good with ohm meter & high & low speed sensors & shift pack test good with ohm meter. what could be wrong?

My car has 82000 miles.
My car has an automatic transmission.

Save Big on Auto Repairs

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

Experienced Mechanic?

Earn up to $70/hr

Apply Now

What others are asking

Headlights don’t always work, what’s the problem?

The headlights in your vehicle are high intensity display (HID) and work differently than the old-style headlight bulbs. These HID when they start to go bad will either start to dim or will blink on and off. The fix for...

What does the liftgate ajar Warning Light mean?

The liftgate ajar Warning Light is located on the instrument panel. This light illuminates when your trunk is not properly closed. Secure your trunk properly, and the light will turn off.

Should I be concerned about my engine when taking frequent short trips?

The problem would be several (10+) short trips per day. The issue is that your vehicle never really has a chance to warm up for the fuel control system to go into "closed loop" status. This is when all systems...

Still over heating after replacing radiator and thermostat. What is next plan of attack

Firstly, I would recommend checking the water pump (https://www.yourmechanic.com/services/water-pump-replacement) for leaks and testing it to make sure it is flowing correctly. Also, as a means to eliminate another possible problem, while you are at it, I would check the coolant...

Engine died suddenly with no warning.

The engine may have lost spark or fuel pressure, or the timing belt might have broke. The ignition switch may have an intermittent open circuit which can cause stalling. If the vehicle can start back up right away, then I...

Changed heads. Engine runs great until I put it in gear, then I have no power from transmission, shifts hard, and breaks are hard.

Hey there. Given that you performed a fair amount of engine work and have no doubts with the battery out of the car, it is possible that the throttle position sensor and engine management have lost their "pairing" values and...

Dead Battery again

You may have a failing voltage regulator that could be allowing the alternator to supply too much or too little amperage to the battery resulting in the battery never maintaining a consistent charge as it is designed to. The voltage...

IF ITS THE THROTTLE BODY CAN IT B CLEANED (REMOVE CARBON BUILDUP) ?

The throttle body can be cleaned, however prior to doing that the cause of the loss of power should be diagnosed. In particular, check to see if the OBD-II system has stored any codes that might give clues as to...

Car won't start

Hi Jessica. Thanks for contacting us today. With turbo-charged four-cylinder engines, diagnosing a starting issue can be more complex than the traditional "getting fuel / getting spark" process. In some case, a faulty or worn out wastegate or other turbo...

The Best Used Cars to Buy If You're an Archeologist

If If you are an archaeologist, you need a vehicle that will take you off the beaten path. After all, that’s where you spend a good deal of your time. And that means that you will need, ideally, an SUV...

The Best Used Cars to Buy If You Have 3 or More Kids

If If you have three or more kids, you could probably get by with a mid-size sedan if all you want to do is take them from Point A to Point B. Realistically, though, having kids means music lessons, athletics,...

The Best Used Cars to Buy If You're Towing a Boat

If If you’re towing a boat, the vehicle that you buy is largely going to depend on the size and weight of your boat plus trailer. Most cars, realistically, aren’t cut out for the job. We recommend a pickup truck...

Q: I had a factory mopar transmission installed & put 1000 miles on it car went into limp mode so I replaced the speed sensors & it f

Get an instant quote for your car

Experienced Mechanic?

Earn up to $70/hr

What others are asking

Related articles

Browse other content