Engine, Exhaust, Transmission and Differential Post questions here that have to do with the engine, cooling system, air intake, exhaust, Transmission and Differential

Check Engine Light

Thread Tools
 
Old Sep 16, 2015 | 12:59 PM
  #41 (permalink)  
maxcichon's Avatar
Senior Member
Joined: Sep 2007
Posts: 8,015
Likes: 14
From: MOFN, AL, 70 miles from George
Default Re: Check Engine Light

Originally Posted by pioneer4x4
Maybe the air pump is running when it shouldn't and that would cause a lean code, correct? You might have found a cause. Before you pulled the fuse, could you hear it running after initial warm-up?
Yeah, it should only run until the coolant temp gets up a little bit, then shut off.
 
Reply
Old Sep 16, 2015 | 02:06 PM
  #42 (permalink)  
jgreen's Avatar
Thread Starter
Joined: Feb 2009
Posts: 85
Likes: 0
Default Re: Check Engine Light

Originally Posted by pioneer4x4
Maybe the air pump is running when it shouldn't and that would cause a lean code, correct? You might have found a cause. Before you pulled the fuse, could you hear it running after initial warm-up?
I am not sure what to listen for do you know the location of th pump?

The engine light came on again this morning. I will run the code to see if it's just posting P0410 error. I'll upload the results later tonight.

Thanks pioneer4x4 for your reply
 
Reply
Old Sep 16, 2015 | 02:07 PM
  #43 (permalink)  
jgreen's Avatar
Thread Starter
Joined: Feb 2009
Posts: 85
Likes: 0
Default Re: Check Engine Light

Originally Posted by maxcichon
Yeah, it should only run until the coolant temp gets up a little bit, then shut off.
Understood. Thank you
 
Reply
Old Sep 16, 2015 | 02:09 PM
  #44 (permalink)  
jgreen's Avatar
Thread Starter
Joined: Feb 2009
Posts: 85
Likes: 0
Default Re: Check Engine Light

Originally Posted by waldig
This has impressed the helll out of me, just bought the Bluedriver code reader.........Wow. WOODY
Hi woody,

It's a great reader! If you can please post your O2 sensors I would like to compare my data to yours.
 
Reply
Old Sep 16, 2015 | 02:57 PM
  #45 (permalink)  
maxcichon's Avatar
Senior Member
Joined: Sep 2007
Posts: 8,015
Likes: 14
From: MOFN, AL, 70 miles from George
Default Re: Check Engine Light

Originally Posted by jgreen
I am not sure what to listen for do you know the location of th pump?

The engine light came on again this morning. I will run the code to see if it's just posting P0410 error. I'll upload the results later tonight.

Thanks pioneer4x4 for your reply
Front, center, top of the engine. It has a lifting ring cast into it.
 
Reply
Old Sep 16, 2015 | 06:20 PM
  #46 (permalink)  
pioneer4x4's Avatar
Senior Member
Joined: Jul 2015
Posts: 953
Likes: 7
From: Greensburg, PA
Default Re: Check Engine Light

Originally Posted by maxcichon
Front, center, top of the engine. It has a lifting ring cast into it.
And when I first heard mine, I thought something was wrong, it is a pretty noticeable sound.
 
Reply
Old Sep 16, 2015 | 10:44 PM
  #47 (permalink)  
pizzaguy's Avatar
Administrator
Joined: Jun 2009
Posts: 13,959
Likes: 1,288
From: Fort Worth, Texas
Default Re: Check Engine Light

Yea, you can't miss the sound. With the fuse pulled, the car will generate a P0410 or P0401 code (can't remember which and I'm too tired to look).

If that pump runs when it shouldn't, then yes, the O2 sensors are going to see stuff they should not.
 
Reply
Old Sep 18, 2015 | 01:40 AM
  #48 (permalink)  
jgreen's Avatar
Thread Starter
Joined: Feb 2009
Posts: 85
Likes: 0
Default Re: Check Engine Light

Originally Posted by pioneer4x4
And when I first heard mine, I thought something was wrong, it is a pretty noticeable sound.
I now see what it looks like (via the service manual) I will put the fuse in tomorrow and see if the pump stays on.
 
Reply
Old Sep 18, 2015 | 02:06 AM
  #49 (permalink)  
jgreen's Avatar
Thread Starter
Joined: Feb 2009
Posts: 85
Likes: 0
Default Re: Check Engine Light

Originally Posted by pizzaguy
Yea, you can't miss the sound. With the fuse pulled, the car will generate a P0410 or P0401 code (can't remember which and I'm too tired to look).

If that pump runs when it shouldn't, then yes, the O2 sensors are going to see stuff they should not.
Just a thought.... When the O2 sensors were replaced could they have plugged them in backwards. Bank 1 Sensor 1 is plugged into Bank 1 Sensor 2 on the PCM?
 
Reply
Old Sep 18, 2015 | 08:40 AM
  #50 (permalink)  
pioneer4x4's Avatar
Senior Member
Joined: Jul 2015
Posts: 953
Likes: 7
From: Greensburg, PA
Default Re: Check Engine Light

Originally Posted by jgreen
Just a thought.... When the O2 sensors were replaced could they have plugged them in backwards. Bank 1 Sensor 1 is plugged into Bank 1 Sensor 2 on the PCM?
Ooooh, if that is it, that would be a great call, it does sound like it could cause his odd readings. I'd have to look and see if the wiring is close enough to reach, have you?
 
Reply
Old Sep 18, 2015 | 08:56 AM
  #51 (permalink)  
jgreen's Avatar
Thread Starter
Joined: Feb 2009
Posts: 85
Likes: 0
Default Re: Check Engine Light

Originally Posted by pioneer4x4
Ooooh, if that is it, that would be a great call, it does sound like it could cause his odd readings. I'd have to look and see if the wiring is close enough to reach, have you?
I am not excatly sure where to look. I l
 
Reply
Old Sep 18, 2015 | 09:02 AM
  #52 (permalink)  
jgreen's Avatar
Thread Starter
Joined: Feb 2009
Posts: 85
Likes: 0
Default Re: Check Engine Light

Originally Posted by pioneer4x4
Ooooh, if that is it, that would be a great call, it does sound like it could cause his odd readings. I'd have to look and see if the wiring is close enough to reach, have you?
I am not exactly sure where to look. I looked at the wiring schematic in the service manual but, not sure where to look under the hood.

Could you snap a pic of your 02 sensors connecting into the PCM. I will verify mine matches the same color code.
 
Reply
Old Sep 18, 2015 | 10:57 AM
  #53 (permalink)  
maxcichon's Avatar
Senior Member
Joined: Sep 2007
Posts: 8,015
Likes: 14
From: MOFN, AL, 70 miles from George
Default Re: Check Engine Light

They are both located right after thier respective catalytic converters.

I doubt the wiring would reach. But I was wrong once.

It was a Thursday, I believe...
 
Reply
Old Sep 18, 2015 | 10:58 AM
  #54 (permalink)  
pioneer4x4's Avatar
Senior Member
Joined: Jul 2015
Posts: 953
Likes: 7
From: Greensburg, PA
Default Re: Check Engine Light

Originally Posted by jgreen
I am not exactly sure where to look. I looked at the wiring schematic in the service manual but, not sure where to look under the hood.

Could you snap a pic of your 02 sensors connecting into the PCM. I will verify mine matches the same color code.
I'll have to wait till tonight or tomorrow morning to look. Anybody else have theirs handier?
 
Reply
Old Sep 18, 2015 | 11:05 AM
  #55 (permalink)  
pioneer4x4's Avatar
Senior Member
Joined: Jul 2015
Posts: 953
Likes: 7
From: Greensburg, PA
Default Re: Check Engine Light

Does this help?



And I don't know what color WL is, According to the Service Manual the only thing close is "WT" for White
BR = Brown
DG = Dark Green
YL\BK = Yellow & Black...
 

Last edited by pioneer4x4; Sep 18, 2015 at 11:12 AM.
Reply
Old Sep 18, 2015 | 01:18 PM
  #56 (permalink)  
maxcichon's Avatar
Senior Member
Joined: Sep 2007
Posts: 8,015
Likes: 14
From: MOFN, AL, 70 miles from George
Default Re: Check Engine Light

White/Lavender
 
Reply
Old Sep 19, 2015 | 12:49 AM
  #57 (permalink)  
jgreen's Avatar
Thread Starter
Joined: Feb 2009
Posts: 85
Likes: 0
Default Re: Check Engine Light

Originally Posted by pioneer4x4
Does this help?



And I don't know what color WL is, According to the Service Manual the only thing close is "WT" for White
BR = Brown
DG = Dark Green
YL\BK = Yellow & Black...
Great schematic thank you for posting it. As for the O2 sensors I wanted to see how they connected into the PCM inside the fuse box. I am not sure if there is a way to miss wire it.
 
Reply
Old Sep 19, 2015 | 01:40 AM
  #58 (permalink)  
jgreen's Avatar
Thread Starter
Joined: Feb 2009
Posts: 85
Likes: 0
Default Re: Check Engine Light

Originally Posted by pioneer4x4
At time 377.2, notice how both bank 1 O2 sensors go to 0V, you might have a ground issue, or a short to ground issue. Just a guess, but I have seen an engine harness rub through and cause issues only under full access when it rubbed a certain way, but looked fine under the hood parked.
A weird ground issue may also explain the other sensor going weird. But as you mentioned Bluetooth OBD2 isn't perfect either.
Is there certain areas of the harness to inspect for wear?
 
Reply
Old Sep 19, 2015 | 07:38 AM
  #59 (permalink)  
waldig's Avatar
Senior Member
Joined: Feb 2008
Posts: 4,508
Likes: 34
From: VA
Talking Re: Check Engine Light

You can swap the connectors on the upper o2 sensors, takes some effort to reach. I did it to test something out and it made richer readings but it did run. WW
 
Reply
Old Sep 19, 2015 | 10:53 AM
  #60 (permalink)  
jgreen's Avatar
Thread Starter
Joined: Feb 2009
Posts: 85
Likes: 0
Default Re: Check Engine Light

Originally Posted by waldig
You can swap the connectors on the upper o2 sensors, takes some effort to reach. I did it to test something out and it made richer readings but it did run. WW
Thank you for your reply. I'll check it out later today.
 
Reply



All times are GMT -4. The time now is 07:54 AM.