Check Engine light and Diagnostics code- How to narrow down

[alokbhaskar]

I have a Toyota Camry-97 and had a Check Engine light. Got the diagnostics done and it gave 3 Error codes in the following order.
P0171 System too Lean.
P1135 Air-Fuel Sensor Heater Circuit Response.
P1133 Air-Fuel Sensor Circuit Response.

What can be the problem ? Is this due to Fuel system. do i need a tue up. Is some sensor created a problem. If yes, is the A/F Sensor same a the oxygen sensor or a different one?
Need help from experts or someone who had this kind of problem.
The car is in great shape- coolant temp is fine, great mileage...etc had run for approx 62,000 miles.
If this is something i can get it done myself -would prefer this instead of taking the car to the dealer.
Thanks

[aseef]

i think you should take the dealer...........

[Phi]

This might sound really stupid...but I'll try and save you the embarassment just incase.

It's somewhat of a common error that I've seen more than I thought actually happened. Check your gas cap. If it's not tight, it may produce Check Engine Lights pointing to fuel problems.

Other than that, perhaps O2 sensor?

Check out this site too;
http://www.2carpros.com/makes/toyota/camry1.htm

[VZV21]

Looks like an 02 sensor related problem

[bxin]

Hi! I'm in the same boat now. My 98 Camry LE (2.2) engine light was on and off in the past. It was on again several days ago. This made the smog check failed (becasue of the light on is a functional error). The diagnosis result is P1133 - Air-fuel sensor circuit response. the garage guy told me it'll cost $350. I called Toyota dealer, they told me $370 (labor and parts) + $60 diagnosis. I'm so frustrated. I want to do it by myself if possible. Can you give me any suggestion? thanks a lot!

[SolaraTRD]

I got a purge valve prob. Taking it to the dealer in late August. $80 for a diag.

[chronoti]

autozone checks the light for free in the states canada you can take it to canadian tire. p1135 is a o2 sensor code, if you have a large enough wrench or willing to buy one you can get this job done in 20 in your drive way. if you get a ome sensor you just have to unscrew the sensor and unplug it then screw in the new one plug that in and your good too go. if you buy one from autozone or where ever you have to splice wires for the connector. i belive the bosch use the same line colours but i'll go and check later and make sure. also for if any of you have the v6 p1135 and p1133 is the back back (one neer the firewall) also if you do a serch on this site for trouble codes i belive phi made a nice list of what they all mean