O2 Sensor Question
Thread Starter
Joined: Dec 2012
Posts: 407
Likes: 10
From: Clarksville,TN
Car: 1989 GTA
Engine: 5.7 w/Paxton
Transmission: 700R4
Axle/Gears: 3.27
O2 Sensor Question
Just wondering if you unplug an O2 sensor on '89 TPI if a SES light should come on? I tried this and I did not get a light.
Found this and mine appears to be workin:
Found this and mine appears to be workin:
Last edited by MrPackstin; Mar 31, 2013 at 10:09 PM.
Supreme Member
Joined: Mar 2008
Posts: 1,549
Likes: 1
From: CT
Car: 86 T/A, 83 Z/28
Engine: 5.0 TPI, 350 2 X 4 bbl
Transmission: 4 speed auto, 5 speed manual
Axle/Gears: 3.23 posi, 3.73 std
Re: O2 Sensor Question
Yes and no. See the SES is tripped when the ECM detects something that doesn't make sense. In this case, for the ECM to determine the o2 sensor is bad (disconnected) it would have to read less than .2V for no less than 50 seconds AND the car must be in closed loop operation. If you say unplugged the o2 sensor and then started the car the o2 sensor would not immediately throw a code. A code would not be set until the car was in closed loop operation and 50 second duration had passed.
Thread Starter
Joined: Dec 2012
Posts: 407
Likes: 10
From: Clarksville,TN
Car: 1989 GTA
Engine: 5.7 w/Paxton
Transmission: 700R4
Axle/Gears: 3.27
Re: O2 Sensor Question
I did not meet the criteria you described when I checked the SES, but I did do the propane test in the above video. Thanks for info.
Thread
Thread Starter
Forum
Replies
Last Post
9192camaro
Engine/Drivetrain/Suspension Parts for Sale
16
Feb 3, 2019 12:21 AM
