Locating Oxygen Sensor Signal Wire - HELP!

Reply Subscribe

Thread Tools

Search this Thread

Jan 25, 2011 | 02:44 AM

bimmertrek

Thread Starter

Senior User

Joined: Aug 2010

Posts: 178

Likes: 0

Locating Oxygen Sensor Signal Wire - HELP!

Need help locating my o2 sensor signal wire in the pcm. Anyone know which it is? PCM is in the drivers footwell along fender, correct?

Thanks!

Jan 25, 2011 | 07:37 AM

krewat

FTE Leadership Emeritus

Joined: Jul 2002

Posts: 42,561

Likes: 423

From: Long Island USA

Which O2 sensor wire? There are two

The PCM is located on the driver's side kick panel. Not sure the 2002 is going to have the same color wires as my 2001, but here's the ones for mine:

Crap, can't find my Ford service manual CD. I'll look around for it - but in the mean time, anyone else have a 2002 EVTM handy?

Jan 25, 2011 | 11:12 AM

bimmertrek

Thread Starter

Senior User

Joined: Aug 2010

Posts: 178

Likes: 0

Any o2 is good I'm just tapping my air fuel gauge and everyone says tap directly to the PCM o2 signal wire.

Jan 25, 2011 | 02:27 PM

mwsF250

Postmaster

Joined: Jun 2008

Posts: 2,564

Likes: 11

From: Wayyy NoCal, USA

It's easier to tap into it on the engine side of the firewall. Just trace the harness up from the 02 sensor and splice in above the connector.

Jan 25, 2011 | 07:44 PM

Wolfboro

Elder User

Joined: Feb 2006

Posts: 545

Likes: 5

From: FL

My 2003 wiring diagram shows (If I am reading correctly ) :

From heated oxygen sensor 11 :
wire 1 (Gray/LtBlue) goes to PCM -terminal 60 (HEGO 11) -same color wire
wire 2 (Red/White) goes to PCM terminal 93 (HEGO11 ) -same color

Heated Oxygen sensor 21:
Wire 1 (Red/Black) goes to PCM terminal 87 (HEGO21)
Wire2 (Yellow/Lt Blue) goes to PCM terminal 94 (HEGO21)

There is also an additional California Spec :
Heated Oxygen 12 (California ) :
Only one wire (White/Black) goes to PCM terminal 95 (HEGO 12).

Hope this helps.
Ken