The Lemon IndexThe idle control isn't holding the right idle speed.
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
Dirty throttle body or IAC valve. Then: vacuum leak; failed IAC valve.
Owners named P0505 in 15 complaints to the U.S. government, most often on the Nissan Maxima.
Cars owners report it on
Complaints that name P0505, by model. Raw counts, not a failure rate: popular models get more complaints.
The details
What P0505 means
The idle control isn't holding the right idle speed.
Can I drive with P0505?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
60% of the owner complaints that name P0505 also say the car stalls or shuts off. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0505
- Dirty throttle body or IAC valve
- Vacuum leak
- Failed IAC valve
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Stalls or shuts off: 60% of complaints
- Brakes or ABS act up: 20% of complaints
- Loses power or goes into limp mode: 20% of complaints
- Warning lights and electrical faults: 13% of complaints
Share of complaints naming the code whose text also mentions each problem.
Related codes
P0504 P0506 P0507 P0500 P050A P050B P050D P0513
Quick answers
What does P0505 mean?
Idle Air Control System. The idle control isn't holding the right idle speed.
Can I drive with P0505?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
What causes P0505?
Dirty throttle body or IAC valve; Vacuum leak; Failed IAC valve.
Counts: NHTSA owner complaints whose text names P0505. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.