Mechanics

ENGINE LIGHT COMES ON WITH NO FAULD CODES

2002 Lincoln LS • 60,000 miles

I keep getting the engine light on after numerous repairs from Tires Plus. I first had a code indicating a fuel mixture problem and Tires Plus said the problem was caused by a leaky intake manifold gasket and they repaired it. After about one hour running time from three start ups the light cam back. They then changed the air intake blower and again the light cam back in the same time duration as the fist time. They then said they were seeing a problem on one of the oxygen sensors and change it. Again the light came back on. They then had a mechanic from a Lincoln dealership come up with the dealerships test equipment and he found a bad wiring harness connecting the oxygen sensor they replaced. Again the light came on. Same mechanic from the dealer came back and found a crushed and split rubber hose elbow from the PCV valve (they showed me the hose). But again the light came back after three start ups and like all the other times except the first time there were no fault codes being displayed. Tires Plus is still working for a solution but they and the Lincoln mechanic say it is hard because there are no faults indicating a possible cause. Do you have any suggestions that may resolve my problem. Also I am not being charged anything since the first repair so the company is not taking advantage of me and they are paying for the Lincoln mechanic and his equipment. By the way the car has always run great with good gas milage before and after the light came on.
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JOEK
October 31, 2011.



Do you have to pass emissions test where your at? You could just live with until some other solution is found?

Tiny
Fixitmr
Oct 31, 2011.
You can disconnect the battery for 30 to 45 secondsto clear the brain then the light should go off? Also check your fuel cap make sure it clicks at least 3 times because the fuel cap can cause the lite to come on! Some say not to unhook the battery because of possible computer damage if that were true then it would cause damage if you had a dead battery makes sense doesnt it no difference

Tiny
BILLYBOB
Nov 11, 2011.
My problem is solved. One day after I asked for help the engine light went off by itself and now it has been two weeks and it is still off. The light never went off by itself before the last repair of the broken PCV rubber tubing. I am assuming the computer was in the process of making adjustments when the light was on and shut the light off automatically when the adjustments were complete.
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Tiny
JOEK
Nov 11, 2011.

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