Tyre pressure system error

[Mittens247]

Preview: Tyre pressure system error
Looking for any suggestions on troubleshooting the tyre pressure monitoring system please.

About 3 weeks ago the TPMS orange warning started flashing and an error appeared on the digital display show TPMS system error and all four wheels highlighted yellow.

I checked the pressures and inflated them slightly and reset the system. Warning light keeps coming back after about a week and has been reset 2 more times. Tyres have not lost pressure.

This happened once before and it sorted itself after about 4-5 resets. I have not scanned the car with OBDeleven tool for any error codes. Just want to ask on here if anyone else has had the same issues recently before I started replacing ABS sensors. Will OBDeleven indicate a faulty sensor or will I need to do a wheel speed test?

Can you fool these passive sensors by setting them at low pressure then inflating the tyres to the correct pressure?

Merry Xmas to all.

[Crasher]

Is the system direct or indirect?

[Mittens247]

It is a passive or indirect system. I have scanned with OBDeleven and got the fault code C1146F0; Tyre pressure monitoring display not available.

I also did a live data test on all four ABS sensors. They all reported the same speeds but both front sensors gave "invalid" readings for direction of rotation and air gap.

I guess the first step is to try and remove both front ABS sensors without damaging them and give them a clean.

[Mittens247]

Indirect

[Crasher]

Are all four tyres the same brand and all within a couple of mm of each other. Can you see the ABS ECU software verion number?

[Mittens247]

All tyres are Michelin premacy 4, same age with 3-4mm tread. Rears are starting to feather, if that makes a difference.

Touch wood, once I cleared the codes, the warning light has not returned. Where would I find the ABS ECU software version?

[Crasher]

If you read the ABS ECU it should have a software level number, a four numerical digit code.