99 xk8 repeat p0171 and p0174 codes
#1
99 xk8 repeat p0171 and p0174 codes
My 99 xk8 has the same codes over and over restricted performance CEL on Ive checked every possible vacuum leak using maf spray and watching fuel trim levels. The car runs strong. I replaced the MAFS and the fuel pump and regulator are within specs. The o2 sensors check good. the vacuum hose to the EGR is good. Could the EGR be causing this? My mechanic thinks the control unit may be over sensitive is there a way to reduce the sensitivity? Ive checked every thread related to these codes p0171 and p0174 for ideas. I would appreciate any help.
Bill
Bill
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billat3800ft (03-16-2015)
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+1 on the advice given so far.
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When you have a moment - stop by the New Member section and post an intro - in return, you will receive a warm welcome and some useful tips for navigating the forum
New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum
enjoy
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RJ237 (03-14-2015)
#6
+1 on the advice given so far.
When you have a moment - stop by the New Member section and post an intro - in return, you will receive a warm welcome and some useful tips for navigating the forum
New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum
enjoy
When you have a moment - stop by the New Member section and post an intro - in return, you will receive a warm welcome and some useful tips for navigating the forum
New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum
enjoy
Last edited by RJ237; 03-14-2015 at 07:09 PM. Reason: sp
The following users liked this post:
billat3800ft (03-16-2015)
#7
Bill
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