P0404

Tests 1 - 2:

Tests 3 - 7:

Tests 8 - 11:

Test 12:

SYMPTOM
P0404-EGR POSITION SENSOR RATIONALITY (6 CYLINDER)

SET CONDITION
The EGR flow or valve movement is not what is expected.

POSSIBLE CAUSES
- High Resistance In 5 Volt Supply
- 5 Volt Supply Circuit Output
- EGR Sensor Signal Circuit Open
- EGR Assembly
- EGR Solenoid Control CKT
- Intermittent Condition
- EGR Sensor Signal Circuit Open
- EGR Sensor Signal Circuit Shorted To Ground
- Sensor Ground Circuit Open
- EGR Assembly (Ground)
- PCM