I have a 1999 jeep grand cherokee lerado its shows a code 0171 and says system to lean bank 1 what does that mean

Asked by Aug 03, 2013 at 06:34 PM about the 1999 Jeep Cherokee

Question type: Maintenance & Repair

3 Answers

think you mean P0171 and you have a lean condition on bank one of the catalytic converter~ think you need a tune-up~

67,445

Also check for vacuum leak(s) or an exhaust manifold leak. HTH. -Jim

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1,520

if there are no leaks in the exhaust system it is usually the upstream 02 sensor

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