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#1
04-10-2009, 04:28 PM
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01 jetta 1.8t,cel PO172 too rich,help
so got a check engine lite on,where should i begin diagnosing.code is po172,system too rich bank1.the car runs perfect.o2 sensor maybe?any help is appreciated..
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#2
04-10-2009, 08:19 PM
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Re: 01 jetta 1.8t,cel PO172 too rich,help
First question is if you had any service or modifications done to the car recently?
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#3
04-14-2009, 05:50 PM
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Re: 01 jetta 1.8t,cel PO172 too rich,help
hey,thanks for replying,only thing was oil change,and replace leaking plastic water hose...used 10/30 valvoline,would not using right oil set a code?(non-synthetic).
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#5
04-14-2009, 06:47 PM
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Re: 01 jetta 1.8t,cel PO172 too rich,help
A dirty MAF Sensor, loose plug wire, dirty/broken spark plug, dirty fuel injectors, vacuum leak, could all be a cause as well as a faulty o2 sensor. If your vehicle has high mileage a total tune-up is where i would start.
1. Spark Plugs and Wires 2. Fuel Filter 3. Air Filter 4. Fuel Injector Cleaner Last edited by Franco2112; 04-14-2009 at 10:56 PM.
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#6
04-16-2009, 04:46 PM
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Re: 01 jetta 1.8t,cel PO172 too rich,help
right on!thanks for your valuable help,im replacing the timing belt this weekend so I will do the tune-up then...I will let you know how it goes! thanks again for your help.talk soon.
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