How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dan Your Own Question
Dan, Technician
Category: Ford
Satisfied Customers: 24584
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
Type Your Ford Question Here...
Dan is online now
A new question is answered every 9 seconds

2001 Ford Ranger 2.5L Speedometer stops working around 40

Customer Question

2001 Ford Ranger 2.5L
Speedometer stops working around 40 mph.
Submitted: 1 month ago.
Category: Ford
Expert:  Dan replied 1 month ago.

Hello, my name is ***** ***** I'm here to help get your problem solved.

Expert:  Dan replied 1 month ago.

Is the check engine light on? Has anything been replaced? Thanks.

Customer: replied 1 month ago.
No check engine light and the speed sensor on the differential has been replaced.
Expert:  Dan replied 1 month ago.

Automatic or manual transmission?

Customer: replied 1 month ago.
Can we do a phone call tomorrow?
Customer: replied 1 month ago.
Manual transmission.
Expert:  Dan replied 1 month ago.

I'm fine with doing chat, website tries to push the phone call option

Expert:  Dan replied 1 month ago.

How system works is the speed sensor sends signal to the PCM then the PCM sends signal to the instrument cluster. IF problem was vehicle speed sensor or wiring between sensor and PCM check engine light would be on. And fact speedometer works up until 40 tells us wiring between PCM and instrument cluster should be fine leaving problem as PCM or instrument cluster. If you have a scantool that can read PCM data you can make sure PCM speed is correct, if so this would verify the instrument cluster as the problem. You can buy a used instrument cluster from ebay or just make sure mileage is about the same so it doesn't need to be reprogrammed. Let me know if you have more questions or if there is anything else I can do to help, thanks.

Expert:  Dan replied 24 days ago.

Ever get it figured out? Please do not forget to rate answer. Thanks.

Customer: replied 22 days ago.
DanWe have replaced the instrument cluster and the problem has not changed. The speedometer still will not work above 40 mph.Is the next step to replace the pcm with a rebuilt pcm? And do we need to have it programmed for this truck?
Expert:  Dan replied 21 days ago.

Yes it does appear PCM is the problem and it will need to be reprogrammed. Let me know how it goes, thnks. .