OEM parts and a speedometer that’s off.
06-19-2020, 12:01 AM
#1
JK Newbie
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Join Date: Jun 2020
Location: corunna, michigan
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OEM parts and a speedometer that’s off.
Hi, recently I have found that my speedometer is -5 to-10 MPH off at slower speeds but correct after I pass 55-60 MPH. Once I go past 70 ish it starts to be off by +5MPh.
it’s my understanding that normally the curve for a speedometer to be off is linear not a curve, what can cause this and can I fix it somehow.
it’s my understanding that normally the curve for a speedometer to be off is linear not a curve, what can cause this and can I fix it somehow.
06-19-2020, 04:41 AM
#2
JK Junkie
First question to answer is whether your Jeep has stock tire sizes. If larger than stock tires were installed, was the speedo corrected to account for the difference in diameter.
06-19-2020, 03:20 PM
#3
Super Moderator
It is possible that the VSS (vehicle speed sensor) is causing, other sensors wheel speed could be involved. 5 Common Bad Speed Sensor Symptoms
- Transmission problems. ...Erratic speedometer readings. ... Inability to engage cruise control. ...Lack of torque converter clutch application. ...
- Check Engine Light is triggered.
06-19-2020, 09:59 PM
#4
JK Junkie
I'd compare the speedometer with the digital reading using a scanner connected to the OBD port. If they don't match, it's probably a problem in the speedo itself.
