Question about 1997 Lincoln Town Car

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Car is very sluggish under acceleration seems like motor is choking out. check engine light on threw codes of po125 and 1131 and 1151 replaced ect

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The P0125 indicates that the coolant temperature is not getting high enough to allow the engine to enter closed loop fuel control and the other codes are an indication of this as well. The first thing you need to do is replace the thermostat and ensure that the engine is running at the correct temperature. There may be an updated thermostat and associated o-ring that goes with it. I would check with your local dealer as an auto parts store may not be aware of the update. After you replace the thermostat and clear the codes, the the 1131 and 1151 codes should not return, but if they do, these cars also had a problem with MAF sensors. It can be replaced or cleaned. The MAF sensor sits right behind the air filter element and measures the amount of air entering the engine. To clean it, you need to take the sensor out of its housing and brush the two sensing diodes very lightly with a q-tip that has been wetted with a little solvent. Hope this helps,
Dave

Posted on Jul 10, 2010

  • Dave  C
    Dave C Jul 10, 2010

    Just reviewing your question I noticed you said; "very sluggish" which indicates that the MAF sensor may be too far gone to clean, I would just replace it.

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P0125 Insufficient Coolant Temperature For Closed Loop Fuel Control
P1131 Lack Of Upstream Heated Oxygen Sensor (HO2S 11) Switch, Sensor Indicates Lean (Bank #1)
P1151 Lack Of Upstream Heated Oxygen Sensor (HO2S 21) Switch, Sensor Indicates Lean (Bank#2)

The p0125 code indicated that something was awry in the coolant temperature, so changing that wasn't out of the question. But, unfortunately, this did not solve your problem.

The p1131 and p1151 codes tell me that the O2 sensors are sensing lean gas.

This is not a 'choking out' situation, but the exact opposite, a lean condition.

Choking may describe the way the engine performs, however.

OK, I would change the two O2 sensors associated with the codes.

Also, I would check to see if there are any antifreeze leaks into the cylinder. I hope you don't have white smoke coming out of the tailpipe.
This would indicate antifreeze is getting on to the O2 sensor, causing them to not switch.

Good luck on this repair, hope I helped you.


Posted on Jul 10, 2010

  • wajustin98 Jul 10, 2010

    no white smoke or any loss of coolant noticed sometimes does overflow out of resevoir though also ive changed ect.also had problem when first got car changed air and fuel filter and it went away. also have mild acceleration only bogs when pedal all the way to floor

  • Duane Wong
    Duane Wong Jul 10, 2010

    Does your fan turn on to cool the radiator fluid?

    I would change the fuel and air filters again if they are dirty.

    O2 sensors on your car might cost $38 to $99 a piece, and if they are not switching

    can cause the symptoms you describe (driveability issues).



    Also, if you have the scan tool, check that the TPS (throttle position sensor) is putting out a smooth signal from 5% up to 100% or so.



    I don't think the TPS is bad, based on your reported symptoms.



    I hope this helps you out.



    Good day.



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Hello. It is likely that your fuel has some water in it and that there is some crud in the engine which is causing these annoying symptoms. Go to the local auto parts store and get two bottles of a fuel additive called seafoam. Follow the directions regarding the amount to add to the fuel remaining in your tank. Drive for a few miles with the treated fuel and you will notice a marked improvement. Repeat the treatment as necessary. J.

Posted on Jul 10, 2010

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