Lost Communication With Tire Pressure Monitor Module
The U0127 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Tire Pressure Monitor Module. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $50 - $600 (fuses, grounds, or wiring most often; module replacement only after the circuit tests good)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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What Are the Symptoms of U0127?
- Check Engine or related warning light on
- The Tire Pressure Monitor Module's functions may be degraded or offline
- Often stored alongside other U-codes when a whole bus segment drops
- Symptoms can be intermittent - connector and wiring faults come and go with heat and vibration
What Causes U0127? (Most Likely First)
- The Tire Pressure Monitor Module has lost power or ground (check its fuses first) High
- CAN bus wiring damage - chafed harness, corroded connector, water intrusion High
- Failed Tire Pressure Monitor Module no longer transmitting Moderate
- Another faulted module loading down the bus Low
Can I Still Drive with U0127?
Yes, but fix soon. U0127 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring the light.
Frequently Asked Questions
What does U0127 mean?
U0127 means other modules stopped receiving messages from the Tire Pressure Monitor Module on the vehicle network. It is a communication fault - the module may be fine but unreachable.
Can I keep driving with U0127?
Usually yes for a short period. The affected function may be degraded, and intermittent wiring faults tend to worsen - diagnose soon.
Should I replace the module for U0127?
Not first. Most communication codes are power, ground, fuse, or wiring problems. Replace the module only after those test good - modules are expensive and often require programming.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose U0127?
-
Scan ALL modules - the pattern of which modules report lost communication localizes the break.
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Check the fuses and grounds feeding the Tire Pressure Monitor Module before suspecting the module itself.
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If many modules are unreachable, test the CAN bus: about 60 ohms across CAN High/Low (two 120-ohm terminators) with the battery disconnected.
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Wiggle-test connectors along the affected harness while watching for the module to drop on and off.
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Only after power, ground, and bus test good should the Tire Pressure Monitor Module be suspected.
Sources 3
This page is built from documented references. Verify against your own service info before repair work.
- FMVSS 138, "Tire pressure monitoring systems" (49 CFR 571.138)cited for the driver-visible behaviour this fault produces, NOT for the meaning of the code, which this standard does not define. S4.4(a) requires a malfunction warning within 20 minutes of a fault affecting the generation or transmission of TPMS signals. On a vehicle using one lamp for both jobs, S4.4(c) requires that lamp to flash for at least 60 and no more than 90 seconds after the ignition is switched on and then stay continuously lit, repeating every ignition cycle until the fault is corrected — which is why this code produces a flashing-then-solid light rather than the steady light of simple under-inflation. Applies to vehicles of 10,000 lb GVWR or less, excluding those with dual wheels on an axle (S2).
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get U0127?
- All OBD-II vehicles - network (U) codes are standardized across makes
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