Possible causes
– Improper idle speed
– The IACV-AAC valve harness is open or shorted
– The IACV-AAC valve circuit poor electrical connection
– Faulty IACV-AAC valve
– Faulty Engine Control Module (ECM)
– The IACV-AAC valve harness is open or shorted
– The IACV-AAC valve circuit poor electrical connection
– Faulty IACV-AAC valve
– Faulty Engine Control Module (ECM)
Tech description
There is a factory service bulletin for the following Nissan models:
2000 Nissan Maxima
2001 Nissan Pathfinder
2000 Nissan Sentra
Nissan Factory Service Bulletin OBDII Code P0505
P0505 Ecm IAC issue 2000 & 2001 Maxima Part 1
P0505 Ecm IAC issue 2000 & 2001 Maxima Part 2
P0505 Ecm IAC issue 2000 & 2001 Maxima Part 3
P0505 Ecm IAC issue 2000 & 2001 Maxima Part 4
P0505 Ecm IAC issue 2000 & 2001 Maxima Part 5
P0505 Ecm IAC issue 2000 & 2001 Maxima Part 6
When is the obd code mean?
The P0505 code is set when the IACV-AAC valve does not operate properly.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Engine hard to start
– Rough or erratic idle speed
– Engine hard to start
– Rough or erratic idle speed
P0505 NISSAN OBD Code Description