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What does it mean to get a fault code out of Port 1?

Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

What does it mean to get a fault code out of Port 1?

  #1  
Old 07-23-2018, 07:30 PM
Junior Member
Thread Starter
Join Date: Nov 2017
Posts: 10
Default What does it mean to get a fault code out of Port 1?

Hi Enthusiasts,

I have a 1995 850 SE, and the tech manual talks about getting codes out of "Diagnostic unit A output socket No. 2" for the fuel injection system, and "socket No. 6" for the ignition system.

Poking around, though, I could see a female socket/contact in socket No. 1. Plugging the test lead into there, I got a 2-2-3 code... but the manual doesn't say anything about socket No. 1.

What system is issuing that code then?
 
  #2  
Old 08-01-2018, 03:00 PM
Senior Member
Join Date: Nov 2006
Location: Birmingham AL
Posts: 1,502
Default

Idle air control valve signal absent or faulty
 
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