2015 Impala Limited Tire Pressure Monitor False read

Asked by Aug 28, 2019 at 01:09 AM about the 2015 Chevrolet Impala Limited LTZ FWD

Question type: Maintenance & Repair

This is a 2nd question with a few more specifics.....Having difficulty with my
2015 Impala Limited (old style) LTZ with a bad left rear wheel speed sensor
At 91,000 miles
Sensor says I am at 23# & manual air gages 2 different ones say it is at at

Need advise on what some of the likely fixes are

On Aug 13th Driver Info Ctr read said it was at 27# & now 2 weeks later it
reads 23# so the signal is weaker and tire pressure is same 34#.
We had a 2 day rainy period before today when the low air pressure warning
light came on.
Wondering if the connector is shorting or is corroded??.  
May take tire off and see if I can disconnect clean lube(w electric-cleaner) &
Anyone have better ideas  Thx

3 Answers


Battery in that sensor is dying, or the sensor is going out. Either way, you have to remove the tire to get to it, so, I'd wait until you need new tires.

2 people found this helpful.

Thx now understand Tire monitor is inside tire requiring dis/re-mounting and is different from wheel speed sensor issues

Was getting message on DIC it was LR tire down. It was the RF tire that was at 31# vs 35 recommended Prior Service Shop tech who did tire rotation failed to to update tire sensor by wheel location

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