Question about 1994 Chrysler LeBaron

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Hi, I get code number 51. Not sure what I can do to find and fix problem. Thanks

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Code 51 is Wide Open Throttle Problem. You need to replace your fuel filter, possibly drain fuel tank and clean fuel pump pre-filter. That is in the fuel tank. If you have the cash, I would replace fuel pump while inside the tank.

Posted on Sep 25, 2009

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For 1986 and later models, code 51 is triggered when the engine has been running lean for more than 11 minutes, 55 seconds, as reported to the computer by the oxygen sensor (O2); and code 52 is triggered when the engine has been running rich for more than 11 minutes, 55 seconds. The power limited light will not be lit in either case.
If the condition which causes code 51 or 52 continues for four times the time it took to set the code (roughly 48 minutes), the engine will run in closed loop mode, which forces it to run rich, preventing it from running lean (running lean can cause severe damage). During closed loop, the logic module continues to monitor the O2 sensor.

Not my words, but hope it helps

Posted on Sep 26, 2009

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I disagree.

A code 51 indicates thathe car was running lean for more than 11 minutes and 55 seconds. Whilst fue pressure 'could' be an issue, I would be looking very strongly at the oxygen sensor, before I wasted any money on the fuel system. If the car runs, and runs reasonably OK, you do not have a fuel delivery issue.

FixYa Moderatior staff

Posted on Sep 25, 2009

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