OBD-II code · Network
U0680 Lost Communication With Barometric Pressure Sensor B
The vehicle bus reports loss of communication with smart barometric pressure sensor B. Altitude correction for engine fueling and EVAP diagnostics switches to a substitute value.
Is it safe to drive with U0680?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBus wiring open or shorted
- PossibleModule without power or ground
- PossibleModule failed
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Baro Sensor B, Vehicle Bus Wiring
Related codes
- U067FLost Communication With Barometric Pressure Sensor A
- U068ALost Communication With Barometric Pressure Sensor C
- U067DLost Communication With Fan 4
- U067ELost Communication With Exhaust Pressure Control Valve B Sensor/Switch
- U0681Lost Communication With Throttle/Pedal Position Sensor/Switch D
- U0682Lost Communication With Throttle/Pedal Position Sensor/Switch E
- U0683Lost Communication With Throttle/Pedal Position Sensor/Switch F
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.