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Can't clear CEL (check engine light) Topic is solved

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lext
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Can't clear CEL (check engine light)

Post by lext » Tue Jun 05, 2018 4:31 pm

I had some vacuum hose problem a while back. All that is gone now, and I've don't have any code for socket A1 (trans) and A2 (engine). Yet the check engine light still remains. Do I have to clear all the codes from all sockets for the light to go away? I have ABS codes but I had them for years before and it didn't lead to CEL.

I'm aware of the procedure: that to clear CEL, I have to use socket A2 and press 6-7 seconds, wait for red light then press another 6-7 seconds. I used this procedure to clear the code on A1 successfully. For socket A2, it had a code before but after I fixed the issue, the code clears off on is own. Both sockets now give me 1-1-1. And yet the light stays on.

Is there a hard-reset option somehow? Mine is a 1994 and I interact using the "control panel" under the hood on the passenger side.


94 850 non-turbo

WhatAmIDoing
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Re: Can't clear CEL (check engine light)

Post by WhatAmIDoing » Tue Jun 05, 2018 10:31 pm

Have you tried disconnecting the negative cable from the battery, pressing the brake, and waiting 30 minutes? Should discharge the entire system and clear everything from the memory.


'98 S70 T5M - 260,000+mi

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Re: Can't clear CEL (check engine light)  Topic is solved

Post by misha » Tue Jun 05, 2018 10:53 pm

Check codes from A6(ignition module).
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lext


'97 850 2.5 20v /fully equipped/ Motronic 4.4 / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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lext
Posts: 60
Joined: Tue Jan 25, 2005 3:05 pm
Year and Model: 1994 854
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Re: Can't clear CEL (check engine light)

Post by lext » Fri Jun 08, 2018 6:49 pm

misha wrote:
Tue Jun 05, 2018 10:53 pm
Check codes from A6(ignition module).
Yes, this does it. Thank you!


94 850 non-turbo

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