I have two fault codes 00172 and 00111 what do thy mean
The 172 is saying the system was or is lean, the 111 cose is a system pass code meaning nothing is wrong, your test cycle ends with this code meaning no more codes present. As for the 172 code, check your intake tube between the air filter and the manifold for cracks/leaks, also check for any other vacuum leaks. Clear codes by disconnecting the battery positive cable for at least 10 seconds. Hope this helps, let me know.
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