trouble codes where to start?

first tacoma had it for about a year. now its throwing a few codes can anyone tell me where to start?

P0125
p0171
p1130
p1135

 

Google

Seriously...google the codes and see what they are.

 

i did that and i cant find anything on where to start, i dont have very much expierence working on toyotas is why i was asking for help. Mabye someone had a similar expierence and wpould be able to point me in the right direction.

 

P1130 Air/Fuel Sensor Circuit Range/Performance (Bank 1 Sensor 1)
P1135 Air/Fuel Sensor Heater Circuit Response (Bank 1 Sensor 1)
P0125 Insufficient Coolant Temperature For Closed Loop Fuel Control
P0171 System Too Lean (Bank 1)

Go to ODB-codes.com to research these and find more info.

Where in CA are you?

 

What did you change on the truck? That would be the first thing I would look at. If nothing, maybe you got some bad gas or something, those are some odd codes. Clear them and see if they come back.

Thats the approach I would take. Then do some more research. Sounds like maybe an issue on one of the injector rails or something.

 

I believe the p0171 is typically the mass air flow sensor. With a faulty MAF it typically will throw the others because it is incorrectly reading the incoming air and not creating the correct a/f ratio.

 

Sounds like bad MAF sensor. You could try to clean it or replace it.

http://www.parksoffroad.com/tacomamods/maintitems/enginecode/cip1130.pdf

http://www.parksoffroad.com/tacomamods/maintitems/enginecode/cip1135.pdf

http://www.parksoffroad.com/tacomamods/maintitems/enginecode/cip0125.pdf

http://www.parksoffroad.com/tacomamods/maintitems/enginecode/cip0171p.pdf

The following URL is to show how to clean MAF sensor (see step 3A or 3B (I know it's 4runner but it shouldn't be so different ?))

http://www.4runners.org/writeups/throttle/index.html

 

Truck is 100% stock I replaced a battery about a month ago and the light was on shortly after that. I cleared the codes abs they came back i will clean the sensor and see what happens thank you for the help. So far.

 

I have a 2001 tacoma as well I swapped the sensor right that is right behind the air cleaner with the one that is from the 2001 and p1135 didnt show up on the scan tool p0171 p1130 p0125 still showed up did i replace the wrong sensor?

 

I am not an expert, but may have some useful info. For starters are there any symptoms, is your truck operating different? I would take a look at the code p0125 first, sounds as though truck may be taking longer to go into closed loop. Thermostat stickng a little, engine coolant temp sensor...This could cause this code to set.(Not sure but i think that it would make A/F mixture richer to try and warm engine to operating temp. P0171- running to lean, a lot of times a vaccum leak causes this code to set (Any unmetered air getting in without mass air flow sensor reading it)1130 A/f sensor is in the exhaust pipe B1S1 before catalayic converter on bank 1. (Bank 1 is whatever side cyl 1 is on. Bank 2 would be the other side)Most manufacturers call A/F sensors oxygen sensors, but i do believe there is some difference) .B1s2 would be bank1 sensor2 after the catalayic converter. Just winging this advice man, i mainly work on transmissions, and not just tacos, so my brain gets a little jumbled unless i have a scanner to look at live data. If it seems as though your truck is taking longer to get to normal operating temp, could be dumping to much gas (running rich)that would cause the A/F sensor to try and lean mixture out. let me know if i helped or confused you further.LoL I believe some of the guys were mistaking A/F sensor with mass air flow sensor. Although i did not go to any of the links they listed. Not saying they are wrong, as i am typing this without really any investigating. Just some things i recall from working on many makes and models of auto's. Luckily i do not have to work on many tacos! also a fanclutch that is locked in can cause P0125, what motor is in your truck? Al

 

i have noticed it takes longer to heat up. and if i clear the codes they stay clean for awhile until the truck is at full operating temp then the same codes come back. it seems like it idles a little rough and kinda sputters off the line when leaving a light or stop sign