U0127

Lost Communication With Tire Pressure Monitor Module

Communication network Generic OBD-II Low

What it means

U0127 means the vehicle's network has stopped receiving expected messages from the tire pressure monitor (TPMS) module. That module reads the tire-pressure sensors and reports low tires. You lose the tire-pressure display and low-pressure warnings, but the vehicle drives normally.

Low

Can I keep driving? Yes, it's safe to drive, but your tire-pressure monitoring is offline — check your tire pressures manually with a gauge until it's fixed.

Real-world scan data

Seen in

420

scans in the past year

Found in

0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of U0127 scans

B1A1Din 47.6% of scans

B1522in 44.3% of scans

B1A20in 42.6% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Warning light or message related to the affected system
The tire pressure monitor (TPMS) module's features stop working or work intermittently
Stored 'lost communication' code in the module that reports the fault
TPMS warning light on or flashing
No tire-pressure readings shown on the display

Common causes

Most likely first

Power or ground fault feeding the tire pressure monitor (TPMS) moduleLikely
Damaged wiring or a loose/corroded connector at the tire pressure monitor (TPMS) moduleCommon
Break in the CAN/bus wiring between the module and the rest of the networkCommon
The tire pressure monitor (TPMS) module itself has failed internallyLess often
Low battery voltage or a recent battery disconnect knocking modules off the busLess often

How to diagnose & fix

Work through it in order

Check battery voltage and charge; a weak battery or recent disconnect is a common, easy cause.
Scan all modules and confirm whether only the tire pressure monitor (TPMS) module is missing or several are — that narrows wiring vs. module.
Verify power and ground at the tire pressure monitor (TPMS) module's connector.
Inspect the connector and harness to the tire pressure monitor (TPMS) module for damage, corrosion, or backed-out pins.
Check for a manufacturer software update or reflash; if wiring and power are good, replace the failed module. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with U0127?+

Yes, it's safe to drive, but your tire-pressure monitoring is offline — check your tire pressures manually with a gauge until it's fixed.

Can I just clear U0127?+

You can clear it, but if the module is still offline the code returns as soon as the network looks for it. Fix the power, wiring, or module first.

Read & clear U0127 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX