Code 31 - ZR-1 Net Registry Forums

Bob Eyres · 06-02-2015

Hey Guys, I'm just waking up the ZR-1 after a long 4 yr. rest

Everything is ok but when I took it out for a run it ran like a bear at first, then popped a service engine light and the Valet mode came on, down on power. After about ten miles of very strong performance it's reading a code 31

Is that a cam sensor like it says in the book, or what?

I've let it cool repeatedly and gone back out. It will seem completely normal for about ten miles of being hammered, then pop, service engine light and code 31`

Any thoughts??

Thanks in advance.

06-02-2015	#1
Bob Eyres Join Date: Jul 2005 Location: Jupiter, Fl. Posts: 815	Code 31 Hey Guys, I'm just waking up the ZR-1 after a long 4 yr. rest Everything is ok but when I took it out for a run it ran like a bear at first, then popped a service engine light and the Valet mode came on, down on power. After about ten miles of very strong performance it's reading a code 31 Is that a cam sensor like it says in the book, or what? I've let it cool repeatedly and gone back out. It will seem completely normal for about ten miles of being hammered, then pop, service engine light and code 31` Any thoughts?? Thanks in advance. __________________ "It's about the car, not the people." 1991 ZR-1 White/Black #1236 (Owner since 1994). Stock engine with bolt-ons: Hurst shifter,"Forced Air" intake, Coplon duct, Bee Cool Radiator, Demon coils, Jeal prom, Watson headers, X pipe, 3" B&B's, Rippie flywheel, 4:10 gears, A molds, Toyo Proxes-R888's 12.06@117mph. 1.76 60ft.