Val Valdez

Junior Member
Joined
Feb 19, 2020
Posts
13
Reaction score
0
It might be worth a try but first check the vacuum lines from the purge valve in case any are cracked or broken.

I re-read what you wrote. If i'm understanding correctly... Since I have now verified that power is getting to the fuse from the BEC, and EVAP CPV is no longer an issue, i now need to verify power is going thru the fuse to the connectors of the o2 sensors, correct?


Could the problem be one of these two components failing?

View attachment 72569

View attachment 72570

View attachment 72571

Anyone???

I figured out one of the components in the photos is the Transmission Range Sensor, which i dont think that would be the issue. Perhaps the other unit that the downstream O2 sensors connect to?
 

Andrew McKee

Junior Member
Joined
Aug 8, 2022
Posts
1
Reaction score
0
Location
Michigan
Did OP ever figure this one out? Extremely similar codes couples with a very rough idle. Briefly checked fuses and found nothing obvious.
 

0M3GA

Junior Member
Joined
Feb 2, 2022
Posts
13
Reaction score
1
Location
CA
Anyone???

I figured out one of the components in the photos is the Transmission Range Sensor, which i dont think that would be the issue. Perhaps the other unit that the downstream O2 sensors connect to?

Was this ever solved? I literally have the same or similar codes on my 2010 mustang, the codes are:

P0135
P0141
P0155
P0161
P0403
P0443
Then they repeat for some reason..
P0135
P0141
P0155
P0161
P0403
P0443

For a total of 12 codes, what makes it even more difficult is this..

The transmission on this car finally died, was sitting for months, I scored a reman transmission at a Picknpull in the central valley (Modesto CA) I removed the engine with transmission to check everything, inspected everything, and the wiring harness was taken apart and inspected as best as I could, looking for anything obvious, nothing(and yes its hard to find a break in the wire) well long story short, everything went back in and the car runs great, unfortunately the car lasted a week without the CEL(car had the SAME codes before)

What's strange is that it all hapened after I removed the wipers and the cowl grille to replace the wiper motor, I decided to clean and remove as much junk as I could, and at the end I got the water hose and washed it wile the hood was down to avoid water from weting components in the engine bay, was being cautious since I didn't want the codes to come back, well the car got a "cold" and I'm at the same spot as before.

It's difficult because the codes don't pop right away, its an intermittent problem that not even the 2 electrician I've seen have been able to pin point the issue..
 

Juice

forum member
Joined
Aug 24, 2017
Posts
4,622
Reaction score
1,904
Was this ever solved? I literally have the same or similar codes on my 2010 mustang, the codes are:

P0135
P0141
P0155
P0161
P0403
P0443
Then they repeat for some reason..
P0135
P0141
P0155
P0161
P0403
P0443

For a total of 12 codes, what makes it even more difficult is this..

The transmission on this car finally died, was sitting for months, I scored a reman transmission at a Picknpull in the central valley (Modesto CA) I removed the engine with transmission to check everything, inspected everything, and the wiring harness was taken apart and inspected as best as I could, looking for anything obvious, nothing(and yes its hard to find a break in the wire) well long story short, everything went back in and the car runs great, unfortunately the car lasted a week without the CEL(car had the SAME codes before)

What's strange is that it all hapened after I removed the wipers and the cowl grille to replace the wiper motor, I decided to clean and remove as much junk as I could, and at the end I got the water hose and washed it wile the hood was down to avoid water from weting components in the engine bay, was being cautious since I didn't want the codes to come back, well the car got a "cold" and I'm at the same spot as before.

It's difficult because the codes don't pop right away, its an intermittent problem that not even the 2 electrician I've seen have been able to pin point the issue..

Most likely, one set is 'current codes' the other is 'permanent codes'.
That's all I can do at this time till you list what each code means.
 

0M3GA

Junior Member
Joined
Feb 2, 2022
Posts
13
Reaction score
1
Location
CA
Most likely, one set is 'current codes' the other is 'permanent codes'.
That's all I can do at this time till you list what each code means.

Late reply but the codes went away for 2 full months... what did I do? Mmm who knows..

The ONLY thing I did was replaced the alternator with one that my friend had laying around, looked new compared to the old crusty thing mine had.. I was also mad so I started to shake the battery wiring harness... and boom problem fixed for 2 full months.

________________________

Unfortunately the codes came back and are more persistent than before, what did I do? Well I drove over a few puddles(been raining in Cali) drove through some rough roads... well I got the codes again literally right after I put gas, ran the car literally on fumes, so what gives? Alternator?

Why the alternator? before I got the codes I would notice I headlights would pulsate(slow pulse) once in a wile from bright(normal) to slightly dimmer. Not only that NOW when the cooling fans come on the RPM drop drastically now like if the car was in need of more electrical power(would happen in the past as well) I find it strange the problem went away after I replaced the alternator.

After a bit of searching I found this:
https://www.allfordmustangs.com/threads/need-help-with-diagnosis.987425/

Same codes, and possible solution on post #6 that states bad diodes on alternator can cause the issues.

Thoughts?
 

redfirepearlgt

forum member
Joined
Mar 19, 2011
Posts
2,497
Reaction score
263
Was this ever solved? I literally have the same or similar codes on my 2010 mustang, the codes are:

P0135
P0141
P0155
P0161
P0403
P0443
Then they repeat for some reason..
P0135
P0141
P0155
P0161
P0403
P0443

For a total of 12 codes, what makes it even more difficult is this..

The transmission on this car finally died, was sitting for months, I scored a reman transmission at a Picknpull in the central valley (Modesto CA) I removed the engine with transmission to check everything, inspected everything, and the wiring harness was taken apart and inspected as best as I could, looking for anything obvious, nothing(and yes its hard to find a break in the wire) well long story short, everything went back in and the car runs great, unfortunately the car lasted a week without the CEL(car had the SAME codes before)

What's strange is that it all hapened after I removed the wipers and the cowl grille to replace the wiper motor, I decided to clean and remove as much junk as I could, and at the end I got the water hose and washed it wile the hood was down to avoid water from weting components in the engine bay, was being cautious since I didn't want the codes to come back, well the car got a "cold" and I'm at the same spot as before.

It's difficult because the codes don't pop right away, its an intermittent problem that not even the 2 electrician I've seen have been able to pin point the issue..

F47 (15A) is the fuse common to all of these codes in the 2005 drawing. Located in BEC. If fuse blows again you need to locate the short to ground fault which if I were guessing is a pinched O2 sensor harness during the tranny swap.
 
Last edited:

0M3GA

Junior Member
Joined
Feb 2, 2022
Posts
13
Reaction score
1
Location
CA
F47 (15A) is the fuse common to all of these codes in the 2005 drawing. Located in BEC. If fuse blows again you need to locate the short to ground fault which if I were guessing is a pinched O2 sensor harness during the tranny swap.

I'm aware of Fuse 47, unfortunately the fuse was never an issue, I check it just to make sure and its fine just like ALL the fuses within the car.

There are NO pinched wires anywhere since the engine and transmission were removed as one, and installed as one. The wiring harness was installed after.
 

redfirepearlgt

forum member
Joined
Mar 19, 2011
Posts
2,497
Reaction score
263
should have stated what you had already done. saves others time who seek to assist. its called courtesy. rambling about what caused the issue, then copping the tude after you get assistance back....like...."yeah I knew that idiot"... gets you lots of brownie points. good luck.
 

86GT351

forum member
Joined
Nov 14, 2010
Posts
5,994
Reaction score
895
Location
Sunny South Florida
First picture where the O2 sensors go into that cover appears to possibly be fluid saturated. Have you used some electrical plug cleaner?
 

0M3GA

Junior Member
Joined
Feb 2, 2022
Posts
13
Reaction score
1
Location
CA
First picture where the O2 sensors go into that cover appears to possibly be fluid saturated. Have you used some electrical plug cleaner?

I checked all my plugs and all were cleaned with CRC Electronic Cleaner to no avail the codes would come back after a short drive OR after a restart. I checked everything, plugs fuses and nothing stood out, as a last resort I added a few hair ties(yeah hair ties) around the fuel door rubber so it can provide a better seal, rechecked all my grounds and added/replaced a ground(behind the engine to the firewall) with a battery cable... idk what it was BUT the codes didn't come back for almost a week..

When the codes came back I was DONE, I dropped the car at my local Ford Dealership to get it diagnosed... lucky for me I was told they previously had another mustang with the same issue, same codes, headlights dimming/flickering, and AC clutch engaging randomly, according to them turned out to be a bad positive battery cable... unfortunately later that day I receive a call with even more bad news, I was told that they couldn't do any repairs until they address a more serious issue, according to a technician there was an issue with the timing cassette on the passenger side, denied that repair($$$) since I wanted to verify for myself, removed the valve cover and greeeeaaat! found a timing guide piece just chillin next to a head stud...

So now I have to pull the engine out AGAIN.... hey at least the Ford technician was surprised that aside from the timing chain issue, the engine is healthy as a horse considering the mileage, compression was 170psi evenly on ALL 6 cylinders....
 

Support us!

Support Us - Become A Supporting Member Today!

Click Here For Details

Sponsor Links

Banner image
Back
Top