What does E4A mean?
Exhaust thermistor is open circuit.
Common causes
- Failed thermistor
- Disconnected connector
- Broken wire
Diagnostic & testing steps
- 1. Test thermistor: ~10K ohms at room temp
- 2. Check connector
- 3. Replace if open
OEM parts & part numbers
Exhaust Thermistor
Part numbers: 134587700
Try DiagBuddy AI free — instant 30-second diagnostics for technicians.