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Symptom:
P0404 - EGR POSITION SENSOR PERFORMANCE
When Monitored and Set Condition:
P0404 - EGR POSITION SENSOR PERFORMANCE
When Monitored: With the ignition on. Battery voltage above 10.0 volts.
Set Condition: The EGR flow or valve movement is not what is expected.
GOOD TRIP EQUAL TO ZERO
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
TEST
1
Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Is the Good Trip displayed and equal to zero?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION symptom in the
No
2
NOTE: Diagnose all other EGR DTC(s) first before continuing.
Start the engine.
With the DRBIII , read the EGR Position Sensor voltage.
Choose a conclusion that best matches the EGR voltage reading.
Below 3.5 volts
Between 3.5 volts to 4.3 volts
Above 4.3 volts
POSSIBLE CAUSES
ACTION
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Go To 3
Go To 5
Go To 7
DRIVEABILITY - NGC
149
APPLICABILITY
All
All
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