Buick LeSabre Problem Report

Buick LeSabre Check Engine Light Due to Gas Cap Issue

(58 reports)

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

Service vehicle soon light on and message said check for loose gas cap. Problem solved by replacing worn and deteriorating fuel pressure harness which is attached to the fuel pressure regulator. Does not require a mechanic to do really. GM part #2450-6640. -
gas cap loose warning light comes on. I replaced the gas cap with a new one and it does the same thing from time to time and the gas cap seems to be tight. -
that happened to me too but u can kinda fix it by disconnecting and reconnecting the negative battery cable. it resets the computer. -
I cleaned the entire area around the gas cap, I had a hand vacume to suck any patricles up -
Gas Cap Loose, Check Cap Message AND Check Engine Light. -
Check gas cap is on constantly -
Problem was intermittent check engine light coming on. Eventually found gas filler tube cracked. Replaced it. Everything OK now. -
Check engine light came on...the mechanic plugged the car into his diagnostic computer. According to the code, he said it's probably a problem with the gas cap. He replaced it...that fixed it. -
light on, chevrolet dealer put on computer to find & they corrected it. -
This was caused by a leak in the fuel filler pipe. New pipe sells for about $500.00, plus installation. This is an easy, inexpensive fix once you know about it. Remove old pipe, easy to remove. Block the large end and fill with water. Blow air in the small end and watch at the large end for bubbles that will appear at the flange. That's where the leak is. Mix up some JB Weld, Walmart $4.00, and apply this weld all around the flange. Make sure you put plenty of weld on and all around or you will get the leak again. After a few hours you can replace the filler pipe. Problem solved. -
light is always on. replaced gas cap and light is still on. -
Check engine stays on and yes bad gas cap. Where can i get i cap that fits properly so light will go off -
No heat from heater. Heater core has been flushed X2, heater blows on the floor but not warm. -
THEAD LIGHTS GO OUT WHEN SHIFTING FROM LOW BEAM TO HIGH BEAM SPORADICALLY. hEART STOPPING DANGEROUS CONDITION!!HAD TO CHANGE THE TURN SIGNAL SWITCH, THE SWITCH COSTED $505.49 WITH LABOR $ $ 598.78. SHOULD BE A RECALL BEFORE SOMEONE GETS KILLED. i REPORTED IT TO THE NATIONAL HIGHWAY COMMISSION. -
tighten gas cap -
Check engine light came on while I was going to work. Have not had a chance to look into it as of yet. -
lower engine light has been on for three months,did not do anything about it,car runs good so have ignored it. -
Replaced gas cap... still triggers check light from time to time -
dash light came on diagnosed gas cap loose bought new cap and installed -
The problem is intermittant. it comes and goes. -
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