Service Engine Soon ISO

Tests 1 - 4:

Tests 5 - 9:

SYMPTOM
SERVICE ENGINE SOON ISO

POSSIBLE CAUSES
- DTC's are present
- Bulb & socket defective
- Open Service Engine Soon indicator lamp driver circuit
- Service Engine Soon lamp circuit shorted to ground
- Defective information center circuit board
- Information center circuit board defective
- Faulty powertrain control module
- Powertrain control module defective