Speedometer stop working and check engine light came on. replace speed sensor and check engine light went out but speedometer still not working.
Sep 7, 2019 at 4:29 PM
Speedometer not working
1998 DODGE DURANGO
BLUEHYDRO
- MEMBER
- 1 POST
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MASTERWRENCH
- ✓ASE Certified Mechanic
- 258 POSTS
Hello,
On your particular vehicle the Anti-Lock Brake Module reads the signal from the wheel speed sensor and sends it out over the communications network to the other modules. In this particular case, there's two different modules that run the speedometer and that turn the check engine lamp on. The fact that the check engine lamp went out when you replaced the sensor definitely suggests that was the original issue.
In some cases, a module needs to be "reset" when issues like this occur. I would suggest performing what's known as a "capacitive discharge". It sounds complicated but it's really not. All you need to do is remove both battery terminals and touch them together for about 20 seconds. After this, reconnect them and see if the speedometer begins working.
On your particular vehicle the Anti-Lock Brake Module reads the signal from the wheel speed sensor and sends it out over the communications network to the other modules. In this particular case, there's two different modules that run the speedometer and that turn the check engine lamp on. The fact that the check engine lamp went out when you replaced the sensor definitely suggests that was the original issue.
In some cases, a module needs to be "reset" when issues like this occur. I would suggest performing what's known as a "capacitive discharge". It sounds complicated but it's really not. All you need to do is remove both battery terminals and touch them together for about 20 seconds. After this, reconnect them and see if the speedometer begins working.
Sep 8, 2019 at 9:07 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.