Z-286speed

p0135, p0155, p0803, and p0102. If anyone one help me out with these codes, its making my car run really really bad. I know two of them are 02 and one is a MAF.

horist

did you just recently install the long tube headers?

Check the "Engine Sensor" fuse under the hood, it's probably blown

horist

P0135 HO2S Heater Circuit Bank 1 Sensor 1
P0155 Heated Oxygen Sensor Heater Circuit (bank 2, sensor 1)
P0102 Mass Air Flow Sensor Circuit Low Frequency
P0803 1-4 Upshift (Skip Shift) Solenoid Control Circuit

Not sure if the skipshift is on the same circuit... but the O2s and MAF are on the same circuit.. so if engine sensor blows, it'll set all those codes

It also puts you into Open Loop Speed Density... which a car not tuned for it will run like complete ***

Now the trick is... why did the fuse blow (If that's it) ... check the O2 wires... I bet one is hitting the header and the wire melted through

Z-286speed

I did just recently splice those wires, so there could be a problem there. I am going to check the engine sensor right now and all of those fuses. I might just have a bad connection on those sensors, or hope to god i do.

Z-286speed

O, and i just had a cam put in, i ran with out 02s in the front for a little while, then had them put in, but tuned for it. I will be back here in 15 mins after i check every thing.

Z-286speed

Runs perfect now, replaced the fuse, Thanks a lot guys!

aNuBiS

iTrader: (25)

where bouts was the fuse? was it one of the ones under the hood?

superduty

Thanks for this thread. You solved our issue too! We crushed the O2 wire on the ground and shorted out the fuse. Threw these codes and now that the fuse is replaced, it's back to normal!

Ryan G

I'm having some problems with my car. Running really crappy, idle issues, really boggy when giving gas...ect...ect.
I took the car to autozone yesterday and it threw 4 codes...

P0121 - TPS/Pedal Position
P0154 - O2 Sensor
P0300 - Random/Mutiple Cylinder Misfire
P0412 - Secondary Air Injection System

I have no idea what would cause these codes. I tried replacing the TPS in the parking lot and it didn't fix the problem. Hopefully it may be just a blown Engine Sensor Fuse?

Does anyone know the part number for the engine sensor so I can maybe try that?
Thanks,
Ryan

horist

just go under the hood and pull the fuse (it's marked on one of the underhood fuse boxes) . you can tell by looking at it if it's blown or not.. if it is blown Radio Shack carries what you need (just go in w/the fuse)


Your situation doesn't sound like a blown engine sensor fuse though... when this started hapening was it after any mods? Probably want to start a new thread to get more ideas/responses