OBD-II code · Network
U016D Lost Communication With Exhaust Gas Sensor Module B
ECU lost CAN communication with exhaust gas sensor module B (often integrates wide-range O2/NOx sensors).
Is it safe to drive with U016D?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyModule unpowered
- Less likelyGateway module routing CAN messages incorrectly
- Less likelyCAN terminating resistor (120 Ω) drifted out of spec
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
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Exhaust Gas Sensor Module B, Can Bus
Related codes
- U011ALost Communication With Exhaust Gas Sensor Module A
- U016ALost Communication With Global Positioning System Module
- U016BLost Communication With A/C Compressor Control Module
- U016CLost Communication With Fuel Pump Control Module B
- U0170Lost Communication with Restraints Front Sensor "B"
- U0171Lost Communication with Restraints Rear Sensor "A"
- U0172Lost Communication with Restraints Rear Sensor "B"
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.