OBD-II trouble code
U0127: Lost Communication With Tire Pressure Monitor Module
A module has stopped receiving messages from the tire pressure monitor (TPMS) module over the data network. TPMS warnings and live pressure readings may be unavailable, but core driving functions are unaffected.
Quick facts
- System
- Network
- Category
- Network Communication
- Severity
- Low severity
- Drivable
- Usually safe to drive short-term
- Repair cost range
- $90 – $500
- DIY difficulty
- Intermediate DIY
What does U0127 mean?
U0127 is a lost-communication network code indicating that a receiving module (often the body control module or instrument cluster) is no longer receiving messages from the tire pressure monitoring system (TPMS) module. The TPMS module gathers signals from the wheel-mounted pressure sensors and reports low-tire warnings and, on many vehicles, individual tire pressures. When that module drops off the communication bus, the network loses its TPMS data and stores U0127. Unlike an 'invalid data' fault where the module still talks but sends bad values, a lost-communication code means the module has effectively gone silent.
This is a low-severity, monitoring-only fault — the vehicle drives normally and braking, steering, and powertrain are unaffected — but you lose the safety benefit of tire-pressure warnings until it's fixed, so it still deserves attention. Common causes are power or ground loss to the TPMS module, damaged or corroded bus wiring and connectors, a blown fuse, an internally failed module, or a wider bus fault. Diagnosis confirms the module's power, ground, and network connection; a scan tool is used to see whether the module is present on the bus before deciding it has failed.
Common causes
- Loss of power or ground to the TPMS module
- Damaged, corroded, or loose bus wiring or connectors
- Blown fuse feeding the TPMS module
- Internally failed TPMS module
- Connector disturbed during nearby service
- A wider communication (bus) fault affecting multiple modules
Symptoms
- TPMS warning light on or flashing, or a TPMS fault message
- No live tire-pressure readings on vehicles that display them
- Loss of low-tire warnings
- Check engine or related network codes stored alongside U0127
- Vehicle otherwise drives normally
Diagnostic steps
- 1.Scan all modules and record every code; note companion network codes that suggest a shared bus fault.
- 2.Locate the TPMS module and verify its power and ground feeds.
- 3.Check the module's fuse and inspect its connector and wiring for corrosion or damage.
- 4.Use a scan tool to see whether the TPMS module responds on the network.
- 5.Rule out a wider bus problem if multiple modules are missing.
- 6.If power, ground, and wiring are good but the module stays offline, replace/program the TPMS module per procedure.
Repair cost
$90 – $500
Wiring, connector, or fuse repairs are often $90-$300. A failed TPMS module with any required programming is the costlier case. Because this is a monitoring system, confirm the network and power/ground before replacing the module.
Estimate your repair
Run the numbers for your vehicle
Open the Repair Cost Estimator with control module replacement & programming preselected. Adjust labor rate and vehicle category to fit your situation.
DIY vs shop
This is an intermediate DIY job. It usually involves diagnostic steps, specialty parts, and some careful work in tight spaces. If you have the tools and a service manual or trustworthy video for your specific vehicle, it is achievable in a weekend. Otherwise, a competent independent shop will be faster.