craigwhite89gt

First off let me start with, My problem started after I installed my 75 MM TB and Ported Intake plenum.. (Stock plenum ported bought off ebay) About 2 days later i got a check engine light. But my car was scheduled to go into the shop for the supercharger. So they cleared codes and tuned car with the charger. A day later they came back.. So i put new 02 sensors in front (rear is turned off). SOO anyway here as what im getting...

P0135 OX S HTR CIR 1 S2
P0155 HTD OX S HTR CIR 2 S1
P1131 Lack of H02S1 SWT LEAN
P1151 Lack of H02S21 SWT LEAN

any ideas on what to do

shiftonthefly1

Try and see if they are here.

http://www.svtlightnings.com/scantoo...tc%20codes.htm

SixEight

You sure the rears are turned off?

craigwhite89gt

Thats what my tuner told me..

craigwhite89gt

P0135 Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
P0155 Heated O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)
P1131 Lack Of HO2S11 Switch - Sensor Indicates Lean
P1151 Lack Of HO2S21 Switch - Sensor Indicates Lean

Any one had these?

99mustanggt

You most likely have a short or open in your wiring harness some where.Since it is on both banks get a wiring diagram and find a common wire between the two and start there.It could be your power or ground wire.If you dont know how to read a diagram or use a multimeter your better off taking it to a shop.Check your connectors and make sure they are not corroded or full of water.Good luck.

craigwhite89gt

Ya im gonna start with the connections. The car is running great so its not like a life/death thing where i need to fix it asap so i can take my time. But ill start there.. Any other opionions welcome.

BraMas

It is deffinatly the first set of O2's that are throwing your codes.
P0135 Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
Bank 1 = what side of engine(left or Right)
Sensor 1= the upstream 02 or first in line
P0155 Heated O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)
Bank 2 = what side of engine(left or Right)
Sensor 1= the upstream 02 or first in line
P1131 Lack Of HO2S11 Switch - Sensor Indicates Lean
HO2S11 = Heated 02 Bank 1 Sensor 1 is showing a lean condition
P1151 Lack Of HO2S21 Switch - Sensor Indicates Lean
HO2S21 = Heated 02 Bank 2 Sensor 1 is showing a lean condition
Basicaly your car is either telling you that your o2's are not working properly or your car is running Lean. This could be very bad if you are S/C

oxfordgt

Wow everybody told you everything that could be wrong with your car but isn't. YOU HAVE A VACUME LEAK find it and fix it. Did you like wasting money on 02 sensors? 99% of the time those codes are vacume leaks and since you put some cheap ported ebay plenum on I'm positive you have a leak.

craigwhite89gt

I would love to agree with you but i am pretty sure i dont have a VAC leak just becuase i Have had one before when i first finished the charger setup and my boost gauge was not working and my blow off valve would sputter.. Car runs perfect right now...