Tire Pressure Monitoring System (TPMS) Sensor Fault
A problem has been detected in the tire pressure monitoring system.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The tire pressure sensor is sending incorrect data to the vehicle's computer, usually indicating that a tire may be underinflated or malfunctioning.
What the computer is actually seeing
The TPMS system sees a discrepancy in the tire pressure readings, which can occur if the pressure is too low or if the sensor fails to communicate accurately within expected parameters.
What a healthy reading looks like
Normal tire pressure readings should be between 30-35 PSI depending on the vehicle specifications.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the tire pressures on all wheels; they should be between 30-35 PSI.
- 2Inspect the TPMS sensors for physical damage or corrosion at connectors.
- 3Use a TPMS scanner to read the sensor data and identify any faulty sensor readings.
- 4Check for DTCs associated with specific tire positions to isolate which sensor is causing the error.
Common causes
- Defective TPMS sensor
- Low tire pressure due to leak
- Faulty wiring or connector
- Dead battery in TPMS sensor
- Vehicle not calibrated after tire rotation
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
Yes, but it's important to check tire pressures immediately to ensure they are safe.
Will the code come back after I clear it?
If the underlying issue is not addressed, the code will likely return after a short time.
Why does this code sometimes pair with C1157?
C1157 also relates to TPMS issues; it often indicates a specific sensor problem or communication failure.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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