Code 21

Got questions about your Infiniti? We're here to help, and it's FREE!
User avatar
elwesso
Posts: 30810
Joined: Sun Feb 23, 2003 4:52 pm
Car: 94 Infiniti Q45t 5 spd
2007 BMW M Coupe
2007 Infiniti G35 S 6MT
Location: Indiana
Contact:

Post

I did a search...... No go.....

Code 21 is, according to the manual........ Is the "ignition signal circuit"........ What does this mean?? What is causing it...... What can be done to fix it!!

I need the 411!!! :)


User avatar
Q451990
Moderator
Posts: 11030
Joined: Tue Jul 23, 2002 8:21 am
Car: 1990 Q45 - 118K, 2022 Toyota 4 Runner, 2004 Frontier M/T - 108K, 2012 Xterra (Mom's), 2023 Rogue (Inlaws)
Location: Columbia, SC
Contact:

Post

I looked in my FSM (in mine it's pages EF&EC 124 - 127) for diagnostic procedure #27. Do you have any symptoms? I'd check the connections on the relays and transistor packs, disconnect the battery for a while, and see if the code stays. Seems like you have a lot of weird electrical gremlins... Chrome wheels would solve that :D

I've never heard of this problem before, so I guess the best thing to do is just take it step by step in the manual, but I'd eliminate the easy stuff first (like resetting everything).

Heath

User avatar
elwesso
Posts: 30810
Joined: Sun Feb 23, 2003 4:52 pm
Car: 94 Infiniti Q45t 5 spd
2007 BMW M Coupe
2007 Infiniti G35 S 6MT
Location: Indiana
Contact:

Post

If I remember correctly, I didnt get this message before I unplugged the battery ( I did this a few days ago, left it undone for 3 days to clear computer codes)

I dont really care about my electrical gremlins, as long as it fixes itself by unplugging stuff!!!

The car doesnt run any different than it did before, or ever for that matter..... if anything, it runs BETTER than when I got it......

Ill check the FSM, and Ill get back to you on those chrome rims ASAP......

User avatar
elwesso
Posts: 30810
Joined: Sun Feb 23, 2003 4:52 pm
Car: 94 Infiniti Q45t 5 spd
2007 BMW M Coupe
2007 Infiniti G35 S 6MT
Location: Indiana
Contact:

Post

Checked FSM, and you have to do a PBT........ With all the other non consult things, you have to have a tester with multiple probes........ :(

I woudl think that if it was bad then it wouldnt run right...... But it runs like GLASS right at 650rpm........


Return to “Infiniti Online Mechanic”