Speedometer issue - speed sensor code

[crjspo23]

Anybody have any experience with a speedometer problem and a code for the vehicle speed sensor?

[WVZR-1]

Anybody have any experience with a speedometer problem and a code for the vehicle speed sensor?


Do you have a code that has been set? Your question is pretty vague!

[crjspo23]

Code 24

[WVZR-1]

Code 24

Code 24 and NO speedometer? Have you done any under car maintenance recently? I'd check first the obvious. I'd check the connector at the VSS (L/R of transmission) and clean it also while there. No other codes just 24? Have you done a recent PROM or done anything at all that involved maybe ECM connectors?

[crjspo23]

Yes. We just replaced the ECM.

[WVZR-1]

Yes. We just replaced the ECM.

Check all three ECM connections, check that the PROM is seated correctly. Do you have the old ECM?

[crjspo23]

Yes, but the old ECM is defective. We will check the ECM and PROM connections though - thanks.

[WVZR-1]

Yes, but the old ECM is defective. We will check the ECM and PROM connections though - thanks.

Did the car run and the speedometer work with the "defective" ECM? If yes then put it back for diagnostics should you find nothing else!

[crjspo23]

Car would run but badly - would not want to drive it that way. No indication of a prior speedometer problem, though.