codes,codes==

[jamesmetairie]

2004 non-turbo,automatic transmission.fwd, 94,000 miles. "cel" shining bright. codes Po133 and Po171. engine running ok. cold start idles around 1750rpm,s. never in sub-zero temps as tsb inquires. tsb says dealer should recalibrate computer ???? mpg in city is usually 22 mpg.no problem observed except "cel" is on. question = can problem build up and leave driver stranded? broke down? also can cat converter be damaged with"too lean"code?? thanks for any advice. Jamesmetairie.

[Raven]

Usually rich running will damage the cat. The O2 sensor signals changes in the air/fuel mixture so if it's weak and on it's way out, it will cause poor fuel mileage. You won't get stranded but it should be dealt with quite quickly.

[Digger]

Take it on a long Highway run for about 70 mile one way then back. Might clean things up.