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850 code 2-3-1 problems

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jblackburn
MVS Moderator
Posts: 14042
Joined: 08 Jun 2008, 15:54
Year and Model: 1998 S70 T5
Location: Alexandria, VA
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Post by jblackburn »

The most common test is to pull out the oil dipstick with the engine running and warmed up to look for smoke. A small slip of paper should be sucked in slightly to the opening, indicating that the system is venting properly.
'98 S70 T5
2016 Chevy Cruze Premier


A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

mercuic: Long live the tractor motor!

easyrhythms
Posts: 8
Joined: 29 Mar 2011, 16:20
Year and Model: 1994 Volvo 850 Turbo
Location: USA

Post by easyrhythms »

well i think the pcv system may be my problem then. there is some smoke coming out of the dipstick so I took it to a shop this morning (quite an endeavor because the car stalled out the entire way lol). i'll post whatever i find out.

Mjollnir
Posts: 1
Joined: 27 Jul 2011, 01:22
Year and Model: 850 T5-R 1996
Location: Poland

Post by Mjollnir »

Hi everyone, I'm the first time poster as well.
Responding to the topic - check ignition distributor cap (and a rotor of course). I had an exactly the same problem - a 2-3-1 code.
Every few days I had to reset ECU in order to enjoy ride with full boost. Replacing cap and rotor solved the problem.
Best of luck.

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