Network
generic / SAE
U0118
Lost Communication with Cabin Air Quality Sensor Module
The Cabin Air Quality Sensor Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. Automatic air-recirculation control loses its air-quality input. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number1 / 18
Possible causes
- Air quality sensor unpowered high
- CAN wiring to air quality sensor broken medium
- Gateway module routing CAN messages incorrectly low
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
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 50–600 €
- Estimated time: 0.5–2 h
- Component: air quality sensor module
- Component: can bus wiring
Sources
References
sae:J2012