Help with SES code. - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-31-2006, 07:43 PM   #1
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Default Help with SES code.

Ok, I used the Actron CP9001 and got the code that set. The number is #54. According to the manual 54 is " low furl pump voltage, or fuel pump relay, or EGR solenoid No.2 failure, or QDM output failure, or M/C (mixture control) solenoid - circuit voltage too high".
Now which one is it? Do I have to test each item on the list, or is there a specific to the Bonneville. I did replace the EGR the week I bought the car. The original one was broken! There is three Torx screws that hold the EGR together and one was missing, and when I took it off another one fell out! LOL! I was gonna replace the missing screws but the only one left broke off in the EGR. So I replaced it. One thing I must note is that it seems the SES light only comes on and goes off when I use the A/C. I don't know if that has to do with anything.
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Old 08-01-2006, 04:46 AM   #2
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Well not sure if anyone is gonna respond on this, but I looked in my Haynes manual on the bonne and it says #54 is the fuel pump circuit. So would this be the relay or the pump itself?
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Old 08-01-2006, 09:58 AM   #3
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Check the codes in Techinfo. The PCM has no clue about the fuel pump. Haynes is incorrect.

Have patience. We have almost half the Gearheads and some other key members on the road back home from WCBF.
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Old 08-01-2006, 12:23 PM   #4
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I don't have any servicing information for your year, but looking in techinfo for 93 code 54 for the supercharged engine in the EGR solenoid #2. How long ago was it replaced? Was it new or used? Did you replace the gasket also, and managed to get it tightened down well?

Try cleaning and lubing the valve. Also, remove the connection to it and reinsert it a few times to see if it may have some corrosion on the connection.
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Old 08-01-2006, 03:02 PM   #5
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It was replaced about 3 weeks ago. I replaced it with a brand new one from Advance and it came with the gasket. I checked the tube when I had it off and it was clean. I have had the connector off since I replaced it. I removed the connector when I did the thermostat because I had to move the harness. I ended up with antifreeze in the top of the EGR where the connector plugs into. I blew out most of the water but maybe it needs to be checked. I will take a look at it and clean it with some alcohol. For some reason it seems that the light only comes on and goes off when I have the A/C on.
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Old 08-01-2006, 03:17 PM   #6
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If the EGR valve is causing the SES error, I'd expect the SES light to come on momentarily whenever the engine reaches operating temp while driving, regardless of whether or not the AC is on, and it'd also trigger the SES light at other times while driving, when the EGR commands solenoid #2 to operate.
If the EGR valve is causing the error, and the valve itself is ok and the port isn't blocked with carbon, check the electrical connector. I had an intermittent problem on my '92 SSE */c, and it turned out to be caused by a bad connection in the electrical connector.
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Old 08-01-2006, 03:31 PM   #7
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I am going to clean the connector in an hour or so and then I have a few places to go so I can try it out. THe reason I say that I seems to only come on when the air is on is I ran without the a/c for like 3 or 4 days and it never came on, as soon as I turned the air on the next day boom there was the ses light. I will report back in a little when I clean the connector.
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Old 08-01-2006, 03:38 PM   #8
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While you're looking at the connector, also inspect it to make sure that the female pin contacts are tight. On mine, the contacts had been spread apart, so I used a small jeweler'* screwdriver to bend the contacts closer together in order to make better contact.
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Old 08-01-2006, 03:39 PM   #9
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Ok will do. Thanks,
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Old 08-01-2006, 05:59 PM   #10
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Ok I cleaned the prongs and the connector with alcohol. THe connector looked like new, but like I stated earlier about the antifreeze I am sure there was residue on it. I then used my pick kit and scraped a little on the contacts. Then I bent all the tabs so that they would be tight against the prongs. I removed the battery cable for 30 seconds and now I will be driving it for a while tonight. I will post back when I get home and let you know if the light came back on. My fingers are crossed
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