View Single Post
      02-24-2010, 01:35 PM   #11
Lemans_Blue_M
Automotive Industry Insider
 
Lemans_Blue_M's Avatar
 
Drives: Lemans Blue M3
Join Date: Aug 2007
Location: Texas

Posts: 1,948
iTrader: (0)

Quote:
Originally Posted by Kyoshi71 View Post
Ohms need to match
+1

This is a must...

The resistance of the wire extension needs to match the original OE 02 sensor wires, in order to ensure a proper signal feedback from the sensors to the ECU.

The 02 sensors work off very sensitive differential voltage values (to calculate the oxygen content in your exhaust gas stream), so a very high, or very low resistance wire will skew the signal feedback results.

When that happens, the ECU will detect an issue (and throw a fault code)...when there is actually nothing wrong.

A poorly executed solder joint (between the OE O2 sensor wire and the new wire extension) will also be problematic.

You will end up chasing a 'phantom' 02 sensor fault code that doesn't exist.
__________________
The best is yet to come...
Lemans_Blue_M is offline   United_States
0
Reply With Quote