northfacer581

so i just had to replace the bulb that illuminates the ac controls, and my cel light was on, but usually its been the 02 sensor, which is good, there is just some issue that toyota cannot workout but says if 02 code pops up, dont worry about it. well....i got 4 more codes pulled today while i was at advance auto, and i need to know how serious of a problem they are, and if i need to get them (mostly sensors) replaced:

P0100 Mass Air Flow

P0120 TPS/Pedal Position Sensor A

P0136 02 sensor Bank 1 Sensor 2, (i think its ok)

P0340 Camshaft Position Sensor A-Bank 1

P1300 Manfacurer Contrl. Ignition System or Misfire

thanks for any help

yotamaster1988

those are all bad codes it sounds like you took apart the whol engine and put it back together ass backwords.

northfacer581

i mean, it drives fine and everything...are these sensors expensive?

HAVOC

Have a look at an EWD (electrical wiring diagram), find out if they share a ground point. You may have a loose ground.

Weasy2k

if you had all those codes your truck would not be running...
Have you unplugged the ecu before?
Has anyone worked on the vehicle recently? (removing any major parts of the truck and put it back together)

Personally i would clear the codes and drive around to seee if they all come back then figure things out. WHo said a o2 code was ok? Why would it be ok? Sigh...toyota techs really make me wonder sometimes...

Greedy

I second the faulty ground. Check the ground on the drivers side of the intake plenum and make sure it is tight.

northfacer581

well....basically the 02 sensor and cel light was "fixed" by toyota, when they replaced both cat converters (cal spec truck), it came back on about 10 miles down the road, cel light did, and it was 02 sensor...so yea....

i cleared the codes....drove about 50 miles tonight....no light

4wheelparts just installed a new front left cv axle...could that have done it? it was on before they touched it though....

im thinking im ok for now...?

Weasy2k

I will never rule out ecu...who knows if the thing will flip out and send codes...the fact that they replaced the o2 sensor and the code came back with everything being ok just means the ecu itself is faulty...everything may be running fine but the ecu just may not realize its outputting all those codes...just drive around and when the light comes back (if) check it again to see what it is.

northfacer581

sounds good, preciate the help. im wondering what toyota did to my ecu when they installed the 7th injector kit...maybe they did nothing but good things

Weasy2k

who knows what could have happened mark/midiwall is going through a worse problem with his ecu (well i think it is) messing up on him.