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If the CEL is on = guaranteed limp mode. Correct?

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Old 05-25-2006, 05:04 PM
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If the CEL is on = guaranteed limp mode. Correct?
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Old 05-25-2006, 05:07 PM
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No way. 75% of us have the CEL light on for one reason or another. Gotta be bad off to be in limp.
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Old 05-25-2006, 05:09 PM
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I currently have a CEL on, due to exhaust problems ... car is otherwise running fine and strong
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Old 05-25-2006, 05:16 PM
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Hmm. My CEL is due to an O2 sensor and car definitely runs worse with it on.
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Old 05-25-2006, 05:29 PM
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umm....maybe bc of the bad o2?
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Old 05-25-2006, 05:35 PM
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Default That I know. But my question is whether or not the CEL for this would put my car in limp mode.
When the CEL goes away, the car runs better.
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Old 05-25-2006, 05:40 PM
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What code do you have? Is it intermittent or on all the time?
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Old 05-25-2006, 05:42 PM
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17539 - O2 Sensor B2 S1 Internal resistance too high. Intermittent
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Old 05-25-2006, 05:53 PM
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Default At worst that would put you in partial limp mode, not full limp mode. I have been getting that one
for a year and a half or so along with warm-up catalyst below threshold.

Bruce
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Old 05-25-2006, 06:02 PM
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Default Limp mode = ~4psi (or less) boost on K03s. How much boost you getting?
Limp mode on K04s was around 6 psi for me...depends on WG spring pressure.

If you have no boost ur limp.

The symptoms of a bad O2 is poor A/F mixture @ part throttle & idle. Fuel trims will be all wacky. This could be why it isn't running right. Clearing the code resets fuel trims which might help smooth things for a short while.
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