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.
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.
Related codes
Often seen with U0127
Read & clear U0127 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX