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Buick LeSabre: Problem Codes/TSBs/Recalls

57 messages,  Last post on Aug 26, 2009 at 10:15 AM

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#48 of 57 Re: 94 Buick Lesabre AC/Heater Fan [billnmd2006] by imidazol97 Nov 28, 2008 (4:16 pm)
Replying to: billnmd2006 (Nov 28, 2008 2:45 pm) Is it electronic dual control automatic system?   could be blower motor--connect a direct wire from the battery positive post (with a fuse in it) to check. If it doesn't work take the ground wire and connect it directly to the negative post of the battery also.   could be the BCM, blower control module, which is the power transistor unit that varies the speed. Follow the wires from the blower motor to the BCM which is under the relay center with all the fuses and relays if I recall the layout correctly.   If it's a manual control system it could be the blower motor. Or it could be the resistor pack for the lower speeds is blown. But then it would work on high speed only because high speed uses a separate relay in the relay center to provide power directly because of the high amperage. Replies to this message: billnmd2006 (Nov 29, 2008 5:42 am)
#49 of 57 Re: 94 Buick Lesabre AC/Heater Fan [imidazol97] by billnmd2006 Nov 29, 2008 (5:42 am)
Replying to: imidazol97 (Nov 28, 2008 4:16 pm) I'm not sure. we took the whole inside control out and took it apart and replaced the fan control switch. all the lights light up on the control except the fan control. The mechanic got a whole unit from the junk yard that unit ran the fan but nothing else worked on that. So it's strange I dont know what the problem is . The blower fan works.
#51 of 57 Error code po421 on 2001 Buick Lesabre by Redboard Dec 07, 2008 (7:26 am)
I assume with this error code I have a bad 02 sensor. I can find the one back by the cat. converter, but isn't there another one somewhere?
#52 of 57 1998 Buick 3800 Motor Check Eng Light by Sizzlerdon Dec 16, 2008 (1:34 pm)
1998 Buick Lesabre with the 3.8, 77,500 miles. I’m coming up with the code P0300.   Need help! I have a (new to me) 1998 Buick Lesabre with the 3.8, 77,500 miles. I’m coming up with the code P0300 which is multi-cylinder misfire. My mechanic came up with it being # 1 & # 4 cylinders. At this time I’ll mention that the code get’s picked up at about 2700 RPM. The engine runs smooth and no noises. We’ve done some of the obvious; Changed plugs and wires. Change out the coil pack. Ran Sea Foam into vacuum at throttle body. Cleaned and shifted around injectors. I’m at a lost, any suggestions out there? Replies to this message: magm66 (Apr 26, 2009 7:35 am)
#53 of 57 '98 3.8L LeSabre P0107 and P0201 Error Codes by pkutz Dec 16, 2008 (4:12 pm)
I have a '98 LeSabre with 110K on it. Currently it's idoling and running rough most of the time. For some reason it randomly decides to run better occasionally. Can't tell any set of occurrences that make it run better - doesn't seem to be temp related.   Check engine light is on. I had it scanned and it came back with these two error codes:   P0107 - Manifold Absolute Pressure [MAP] Sensor Circuit Low Voltage P0201 - Injector 1 Control Circuit   My thoughts are that either one of the two parts in question is causing all the problems or some other underlying third problem is causing them. Maybe an intake manifold gasket or other vacuum leak?   Any thoughts on what the most likely culprit is?   Thanks much!
#54 of 57 1998 Buick Lesabre MAP Sensor Voltage by Schmegalhof Feb 06, 2009 (5:20 am)
I have the "Check Engine" light staying on. I had it scanned and it came up with the MAP sensor. I check the voltage from the positive terminal of the harness connector to ground and it reads 11.5 Volts. Should this voltage be closer to 4-6 volts like it says in the 1995 Buick Service Manual or did they increase the voltage on the 1998 model? If it should be 4-6 volts does anyone have an idea of what might be the problem? Does it mean that the PCM is bad and needs to be replaced?   Thanks, Schmegalhof
#55 of 57 not fireing by sunfire344890 Apr 10, 2009 (6:48 am)
i have a 95 buick lasabre. was running fine ecxept wene we drove it it just lost all power a few times. you could hear fuel pump kick in, it rolled over but had to do this several times before it started agian. change fuel filter, plugs, wires, and ecm computer. now its not fireing on 2 cylinders. went to junk yard bought a ignition module still not firing on same 2 cylinders. can you give me suggions on what im not seeing here. oh i had boesch plugs went back and put ac delco in still no change
#56 of 57 Re: 1998 Buick 3800 Motor Check Eng Light [Sizzlerdon] by magm66 Apr 26, 2009 (7:35 am)
Replying to: Sizzlerdon (Dec 16, 2008 1:34 pm) I have the very same problem. I have changed, TPS, MAP, MAF, EGR, fuel pressure regulator, spark plugs, wires, plenum, lower intake gaskets, PCV, coils. My ignition module was checked at Autozone and turned OK. Compression reads 195, 190, 190, 190, 190, 200. I wonder if I may have a broken valve spring or faulty knock, crank, or cam sensor, Did you find the problem on yours? Thanks.
#57 of 57 CODES READ "NOT READY" by foreverjokker Aug 26, 2009 (10:15 am)
I have a 2002 buick lesabre and am tring to get it inspected but for some reason when it is hook up to the obd2 it reads that my o2 senser, o2 sensers htr, Evap, catalyst all say "not ready" why is this. It will not pass inspection enless it can read and I no there is nothing wrong with the vehicle (even the mech said that) please help me before I get a ticket thank you

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