Date: Wed, 11 Nov 1998 13:06:18 -0600
From: Scarabe Green <>
Subject: Re: 9000 CSE Check Engine 4 flashes

Hugh Williams wrote: > Just changed my '87 900i for a '94 9000CSE. > The Check Engine lamp has just come on and remained on while driving. > After stopping the engine I turned the ignition back on and observed the > following: > Lamp comes on then goes out as normal. > Then it does one long flash and four short ones. Then the flash sequence > repeats. > > Does anyone know what this means? Last Monday I posted a message titled "OK to drive 9000 with CHECK ENGINE on?" both in this newsgroup and in the Saab Network Bulletin Board, One of the replies in the Board (the one by BobS...thanks BobS!) gives the different flash codes, the surrounding context, and reset information. I would guess that "one long flash" you observed is the 3 second marker. And if BobS has given correct information, the four short flashes (which happens to also be my case) indicate "coolant temperature sensor". I did not see flash code information in Haynes. I'm disappointed that Haynes left this out. So, now I will try to follow Haynes to see if I can locate the coolant temperature sensor, if there is easy access to it without having to disassemble anything, and if I can test its resistance in place (without having to remove it and consequently drain the cooling system) against the Specifications in Haynes.

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