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Car set one of these just cruising around town...

Going to replace front o2 sensor and fuel filter...

Also going to put a new gasket between the cat and cat-back as I have an exhaust leak ( <-- possible culprit? )...

Any other suggestions?

Brad
 

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2HiPsi said:
Car set one of these just cruising around town...

Going to replace front o2 sensor and fuel filter...

Also going to put a new gasket between the cat and cat-back as I have an exhaust leak ( <-- possible culprit? )...

Any other suggestions?

Brad
Brad,

Have you made any modifications to the intake recently?

The PO171 sets when your ST and LT trims are set to full lean (+16%) for the specified amount of time.

It's also possible that you have developed a vacuum leak. Before you waste money on parts, check for a vacuum leak.

Good luck!:)
 
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