garajizOBD-II code · generic
U02A4
Lost Communication With NH3 Sensor
- System
- U — In-vehicle network
- Severity
- Moderate (3/5)
- Can I keep driving?
- Drive with caution
What does U02A4 mean?
U02A4 is defined as “Lost Communication With NH3 Sensor”.
Drive gently and only as far as you need to; have it checked as soon as possible.
Related codes
- U02A3Lost Communication With Particulate Matter Sensor
- U02A5Lost Communication With Reductant Heater Control Module
- U02A2Lost Communication With Reductant Quality Module
- U02A6Lost Communication With Safety Integration Control Module
- U02A1Lost Communication With NOx Sensor C
- U02A7Lost Communication With Engine Sound Control 1
Look up another code
This page is general information; an exact diagnosis needs measurements and a technician’s check.