Nissan Altima throws code P 505

Asked by Jan 14, 2014 at 10:43 PM about the 1998 Nissan Altima GXE

Question type: Maintenance & Repair

98 Altima had total engine rebuilt. Head was warped, machined smoothed, runs  great.
Now engine light on, throws code P 505 and needs Ca. smog cert. Tech said it  will be
about $400.00. He let me know he isn't sure that it will fix problem. My question is
does 98 Altima need to complete a specific drive cycle for the  computer to reset/ re-
learn after rebuilt or do I just keep replacing sensors and parts.Most sensors, all
gaskets were replaced when engine was done.

2 Answers


You can try clearing the codes first and see if the light stays off, if it comes back on then you have an issue.....

1 of 1 people found this helpful.

its the idle control system malfunction so you know what p0505 is

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