O2 Sensor Question
Thread Starter
Nordschleife Master
Joined: Dec 2016
Posts: 8,050
Likes: 819
From: Kauai
O2 Sensor Question
I think the PO may have used the wrong post cat sensor as both (post and pre cat) are Blue. Every pic I see has black/grey for the post cat.
The question now is there a difference in the sensors and could there be any harm done? I have no codes and car runs strong. I do get an occasional stumble at idle, the tach drops and the voltages drops briefly.
The question now is there a difference in the sensors and could there be any harm done? I have no codes and car runs strong. I do get an occasional stumble at idle, the tach drops and the voltages drops briefly.
RL Community Team
Rennlist Member
Rennlist Member
Joined: Apr 2010
Posts: 6,284
Likes: 1,510
From: Ormond Beach, FL
The DME is very sensitive to the O2 sensors, so I would say you are good to go with no CEL codes. On the stumble, do you have a drive by wire (throttle cable) or E-gas? If the former, clean and check the ICV on the throttle body.
RL Community Team
Rennlist Member
Rennlist Member
Joined: Apr 2010
Posts: 6,284
Likes: 1,510
From: Ormond Beach, FL
With E-gas, have you done a re-calibration? Turn ignition switch to ON (not start), wait 60 seconds, then turn to off. Should hear some whirring clicking sounds from the TB. Also you could reset everything by disconnecting the negative battery lead for 30 minutes, reconnect and then do the re-calibration of the E-gas. A drive will then start the re-adaptation cycle of the DME.
