Heated O2 Sensor
Le Mans Master
Joined: Jan 2003
Posts: 5,858
Likes: 7
From: Santa Maria CA
None, I run the factory one because my car goes into closed loop just fine with headers. So for me a heated sensor is an unnecessary waste of time and money.
If your car goes into closed loop, you don't need a heated O2. Put the car in field test mode to find out. Otherwise you're just wasting money on a heated sensor you might not need.
You basically ground the A and B terminals of the ALDL plug just like if you where pulling codes, but you actually start the car this time. The engine light will flash 2 times per second on a cold start up indicating the car is in open loop. If you go into closed loop (meaning your O2 has no problem coming up to temp) the flash rate drops to 1 flash per second. If the car never goes into closes loop, obviously your O2 isn't getting hot enough, so you need a heated one.
If your car goes into closed loop, you don't need a heated O2. Put the car in field test mode to find out. Otherwise you're just wasting money on a heated sensor you might not need.
You basically ground the A and B terminals of the ALDL plug just like if you where pulling codes, but you actually start the car this time. The engine light will flash 2 times per second on a cold start up indicating the car is in open loop. If you go into closed loop (meaning your O2 has no problem coming up to temp) the flash rate drops to 1 flash per second. If the car never goes into closes loop, obviously your O2 isn't getting hot enough, so you need a heated one.
