Hey guys, I have a 99 rx300 with around 160,000 miles on it. The car had a CEL on for a while for the catalytic converter inefficiency but just had the water pump, timing belt and alternator replaced because it was starting to make some noise. I got the car back and it drove ok but when coming to a stop it seems to want to stall out sometimes and sitting in traffic it idles around 500rpm. I brought the car back and nothing was wrong to them so I brought it to autozone to double check the codes (expecting the catalytic code).
it ended up having 3 codes
-p1133: air/fuel sensor circuit resolution,bank 1 sensor 1
- p1315: igniter circuit malfunction, bank 4
-b2798: communication malfunction number 2

I looked up each but is it possible for these to be caused by an improperly installed timing belt/water pump, or alternator?

The car car never wanted to stall before the shop did the job

Thanks for any help.

 

Take it back to the place who replaced the timing belt. It can be a loose ground or something as they need to check their work.

Salim

 

Improper timing belt install will result in P1346 and P1351, which are associated with improper camshaft timing.