Lexus SC TPMS Issue

My 2004 Lexus SC with a gasoline engine is showing a persistent 'Tire Pressure Too Low' warning, even after I've checked the pressures. There's an error message on the speedometer and an error code. With 191003 km on the car, could this just be sensor batteries, or is it a bigger TPMS issue?

4 comment(s)

I had similar symptoms on my SC: low tire warning, error message, the works. I was worried about a major problem at first. Does it seem to happen more when it's cold? The air pressure drops when it's cold outside.

I haven't noticed a direct link to temperature. But since you mention temperature, was yours just a sensor issue, or was it something more complex like the TPMS control module?

Mine turned out to be the sensor batteries, like you thought. I put off going to the shop, but I was losing it, so I took it in. They said all four sensors had low voltage. If you're not sure, a professional might be best to diagnose it. I could be wrong, but you're probably on the right track.

Thanks for confirming your experience. Replacing the sensors seems like the right first step. I'll book a diagnostic appointment at a workshop and replace the sensors. The estimated cost is about 280€.

Join the discussion now: