failed smog check and not sure if cost to fix is worth cost of vehicle

1999 TOYOTA AVALON
172,000 MILES • 3.0L • 6 CYL • 2WD • AUTOMATIC
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DIANENEEDSCARADVICE
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Fault codes are P0125: Low ECT for closed loop fuel control, P1133, P1135.
It still runs fine. Other than needing a driver's side mirror and a door handle on passenger's side, it looks great inside and out. Could use some advice. Unfortunately, I only have until Jan 18, 2015 to decide as that is when registration is due. Thank you for any assistance you could offer.
Jan 9, 2015 at 1:47 PM
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MHPAUTOS
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The first code P0125 will probably be a coolant temp sensor, and the other codes are to do with the 0O2 sensors, I would first do the coolant temp sensor and clear all codes and see what re sets after that. The O2 codes may be a result od the faulty coolant temp sensor. Start here.
Jan 9, 2015 at 2:21 PM