So after having a used stage 1 installed at a local dealer my check engine light came on with the following output

P0135O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0147 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 3)

i took the car back in but they told me i needed to buy a new stage 1 from them. i still think they are full of it and just want me to buy a new stage 1.

maybe someone can help give me some feedback on how to fix this problem

 

What year is your car?

 

2004

 

I was thinking if it was an 05 then it was the old stage 1 but i dont know maybe Sexy will be able to help.

 

sounds like you don't have a cat in the car

 

I don't let cats in my car.. they like to claw too much [sm=joke.gif]

 

I'm allergic to 'em myself.......

 

Same here, it sets off an asthma attack.

 

P0135-O2 SENSOR 1/1 HEATER PERFORMANCE
When Monitored: Engine Running and Heater duty cycle greater than 0%
Set Condition: O2 Heater Temperature does not reach 350°C (662°F) within 90 second
during monitoring conditions. Two Trip Fault.

POSSIBLE CAUSES
O2 SENSOR HEATER OPERATION
O2 HEATER ELEMENT
O2 HEATER GROUND CIRCUIT OPEN
O2 HEATER CONTROL CIRCUIT OPEN
PCM

That # isn't in my FSM. Are you sure it wasn't P0141? (P0141 lists the same possible causes as P0135.)

If you put the old PCM back in and the problem doesn't go away, it's not the PCM.

Hope this helps.

 

good stuff.