P0404

Tests 1 - 2:

Tests 3 - 6:

Tests 7 - 10:

Test 11:

SYMPTOM
P0404-EGR POSITION SENSOR PERFORMANCE

WHEN MONITORED
Engine Running and battery voltage above 10 volts.

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

POSSIBLE CAUSES
- High resistance in 5 volt supply
- 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