U0177
Lost Communication With Restraints System Sensor H
U0177 is an OBD-II diagnostic trouble code meaning: Lost Communication With Restraints System Sensor H. Common causes: open or short circuit in the sensor circuit, oxidation of contacts in the sensor connector. Estimated repair cost: $56–167.
Symptoms
- The airbag light on the dashboard is on
- SRS may be disabled
- Error message on display (if present)
- Problems with the operation of seat belt pretensioners
- Incorrect operation of passenger sensors
Causes
- Open or short circuit in the sensor circuit
- Oxidation of contacts in the sensor connector
- Malfunction of the security system sensor itself
- Damage to the wiring harness after an accident
- Problems with the SRS control unit
How to Fix
- Check the integrity of the wiring to the sensor
- Clean the contacts in the connectors
- Check the sensor resistance (according to the manual)
- Replacing a faulty sensor if necessary
- Repair only from an authorized dealer
Related codes
Error U0177 by Vehicle Brand
FAQ
What does the U0177 code mean?
U0177 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Restraints System Sensor H
What causes a U0177 error code?
The most common causes of U0177 include: Open or short circuit in the sensor circuit; Oxidation of contacts in the sensor connector; Malfunction of the security system sensor itself; Damage to the wiring harness after an accident.
How do I fix a U0177 diagnostic trouble code?
To fix U0177: Check the integrity of the wiring to the sensor. Clean the contacts in the connectors. Check the sensor resistance (according to the manual). For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0177?
Do not drive — repair immediately
How much does it cost to fix U0177?
The estimated repair cost for U0177 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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