Q: Speedometer speed display problem, possible skipping

asked by on

I have an odd issue going on. When I'm driving, no matter what speed, and with or without cruise control, the speedometer will drop. Example: If I'm going 65, it will drop to around 30. The car's speed stays consistent, but sometimes it feels like the engine "skips". I've been to my mechanic repeatedly. All the wiring is good. They ran some computer checks on it, and the issue was supposedly with the cluster in the instrument panel. They replaced that whole thing, but the problem is still happening. If it isn't the instrument cluster, what else could it be?

You will need to take it to the dealer for them to flash the engine control module (ECM) per technical bulletin 18-001-08. A reprogram is needed to correct the ECM programming for the proper cluster speed readings. You have to take it to the dealer because only they have the scan reprogramming tool. This is not a recall so you may be charged for the cluster reprogramming. However, there may be an active recall for the ABS on this vehicle which involves reprogramming that module, so I suggest checking with the dealer to have it done at the same time. There should be no charge for the ABS reprogramming as that is related to a recall.

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. Speedometer speed display problem, possible skipping

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: Q: Spark plug

It's never a good idea to drive a car with a misfiring engine! If the misfire is due to a bad spark plug as you are presuming, there could be secondary ignition voltage feeding back to the ignition system which...

Q: Tires making whining noise.

The tread wall of the tires need to be checked for abnormal wear. Inspect the tires to ensure no steel chords are exposed on the tire. Run your hand across the inner and outer edges of each tire to see...

Q: C121C torque request signal denied and P0334 Cam shaft sensor

The cam sensor code (actually P0344), is known problem, and there is a Technical Service Bulletin (232460) that addresses this fault and repair. Check with your Dodge dealer to understand what the TSB covers or not. The C121C code has...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...