Anyone w/a JHM Tune getting a CEL Fault (O2 sensor)? I'm gettn it after 10k/5 months

[Eddie Man]

Just came up yesterday after lunch and when I got home, read and cleared the codes...
Reappeared again this afternoon.

Here's the VAG-com report:

2 Faults Found:

16524 - Oxygen (Lambda) Sensor B1 S2: No Activity
P0140 - 004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 0
Fault Frequency: 4
Mileage: 129249 km
Time Indication: 0

Freeze Frame:
RPM: 6025 /min
Load: 45.5 %
Speed: 122.0 km/h
Temperature: 87.0°C
Temperature: 6.0°C
Absolute Pres.: 960.0 mbar
Voltage: 13.716 V

17522 - Oxygen (Lambda) Sensor; B1 S2: Internal Resistance too High
P1114 - 008 - Implausible Signal - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10101000
Fault Priority: 0
Fault Frequency: 9
Mileage: 129315 km
Time Indication: 0

Freeze Frame:
RPM: 3223 /min
Load: 18.4 %
Speed: 123.0 km/h
Temperature: 91.0°C
Temperature: 2.0°C
Absolute Pres.: 960.0 mbar
Voltage: 13.843 V


I'm at 80k miles now and was wondering maybe if my O2 sensors are in need of replacement.
BTW, I am running Milltek Catback and Milltek Catless DPs w/Double O2 extenders on my secondary O2 Sensors.
No CEL whatsover from day one after getting the JHM tune, till now.
Not sure what it may be.
Can anybody shed some light on this.
Thanks.

[tatarin]

just bad O2 sounds like

[SoCalS4Avant]

The 02 sensors are definitely a likely place to start, as you've not had issues up until now, and considering the codes.

I do have to comment on the fact that you've put on 10k miles in five months. DAMN EDDIE!

[ginkof]

Is this your Front or rear O2 sensor?
First place I would start since it is saying no signal is to make sure the sensor is plugged in tightly and the wire has not melted. If it is a front O2 sensor I would replace it. If its a rear O2 sensor I would send my ecu back out to jhm and have them tune out the rear sensors... I'm sure they would help you out since you already purchased their tune. It will be much much cheaper in the long run since you will never have to replace the rear sensors every again! My $.02

[jfunkey]

Is this your Front or rear O2 sensor?

B1 is always the driver side.
S2 sensor 2 is the back.

Eddie. Its bad. replace it. I think if the sensor was unpluged it would say short to pluss? any way one of the perks of getting the JHM tune.. they don't shut off the ability of the 02 to tell you when it is dammaged.

I had my rear 02's shut off on my 2.7T by a company and who knows how long the 02s were bad but my gas mileage got real bad and I only found out why when I switched to a different tune... Bad rear 02's

[noznab]

I had a code pop up like that about a month ago. Replaced my 02 sensor and all is well again

[Ill 3.0]

I thought JHM tune wrote out efficiency codes and did not require O2 spacers?

[DuncanC]

B1 is always the driver side.
S2 sensor 2 is the back.

Eddie. Its bad. replace it. I think if the sensor was unpluged it would say short to pluss? any way one of the perks of getting the JHM tune.. they don't shut off the ability of the 02 to tell you when it is dammaged.

I had my rear 02's shut off on my 2.7T by a company and who knows how long the 02s were bad but my gas mileage got real bad and I only found out why when I switched to a different tune... Bad rear 02's

I need more details if you know them...
I was under the impression that all A/F adjustment was done based on the output of the front set of O2. The rear O2 only are there to measure the difference between them and the fronts so the computer can keep tabs on if your cats are working. Any idea where my reasoning is wrong and why the rear O2s reading are still needed?

[jfunkey]

I need more details if you know them...
I was under the impression that all A/F adjustment was done based on the output of the front set of O2. The rear O2 only are there to measure the difference between them and the fronts so the computer can keep tabs on if your cats are working. Any idea where my reasoning is wrong and why the rear O2s reading are still needed?

Im not sure of all the detials. The rear 02's help with long term fuel trims. The also act to moditer the cats yes. The cat part Is part of monitering the long term fuel trims.

I know when I worked at wheel to wheel we would ship cars to china. No cats at all... they still had rear 02's.

[Eddie Man]

Thanks for all the input guys
You've confirmed what I've suspected, the O2 sensor(s) will need to be changed.

Ok now Jillian, when looking onto the JHM site, Jason refers to the Rear Passenger Side O2 sensor as the B1 or Bank 1.
Either way he also recommends replacing them in pairs so the point I guess is moot.
At $140 per pop or really $280, it's not a cheap fix.
Well as spring is just around the corner, might as well plop down for my Belt Replacement and why not too for the Light Weight Pulley.

B1 is always the driver side.
S2 sensor 2 is the back.

Eddie. Its bad. replace it. I think if the sensor was unpluged it would say short to pluss? any way one of the perks of getting the JHM tune.. they don't shut off the ability of the 02 to tell you when it is dammaged.

I had my rear 02's shut off on my 2.7T by a company and who knows how long the 02s were bad but my gas mileage got real bad and I only found out why when I switched to a different tune... Bad rear 02's

Yep Dan, I've really had to cut back on drivn the rig this past month or so, been traveln (plane) alot

The 02 sensors are definitely a likely place to start, as you've not had issues up until now, and considering the codes.

I do have to comment on the fact that you've put on 10k miles in five months. DAMN EDDIE!

[ginkof]

jhm didn't just turn off the rear O2 sensors... They were tuned out... big difference

[Ill 3.0]

jhm didn't just turn off the rear O2 sensors... They were tuned out... big difference

Sure, but can anyone answer why they would need spacers then?

Thinking about it more, I'm guessing the spacers were already present, then the JHM tune was added later?

[beemercer]

Ok now Jillian...

I now know the back story behind this

Well as spring is just around the corner, might as well plop down for my Belt Replacement and why not too for the Light Weight Pulley.

If you do the crank pulley and belt make sure you get a new tensioner and idler, should only be $160 extra. I didn't and I snapped two serp belts pretty quickly, the first time I ended having to drive about 15 minutes with no battery charging through some suburb of Detroit... we ran about 15 redlights to make it in time. Anyways though, the salty weather has a tendency to wear out the bearings and they get outta line. Replace it all at once just to be safe.

[dextrek]

Eddie, are you coming out to EMW on Saturday?

[Eddie Man]

Yep, that's right...
Prince and I was talkn about those spacers and it was deemed unneccessary but didn't hurt either leaving them in.

Sure, but can anyone answer why they would need spacers then?

Thinking about it more, I'm guessing the spacers were already present, then the JHM tune was added later?

Haha, I'm sure it's good :)

Thanks for the tip and I'll surely pick up that tensioner pulley now that you've mentioned it.
I'm a huge proponent of "gettr all done" when you got ur sleeves rolled up.

I now know the back story behind this

If you do the crank pulley and belt make sure you get a new tensioner and idler, should only be $160 extra. I didn't and I snapped two serp belts pretty quickly, the first time I ended having to drive about 15 minutes with no battery charging through some suburb of Detroit... we ran about 15 redlights to make it in time. Anyways though, the salty weather has a tendency to wear out the bearings and they get outta line. Replace it all at once just to be safe.

You mean GMW right?
And yes, I may stop by...
I gotto tackle an item on the Honey-Dew-List, long over due.
Xmas lights on the house gotta come down, or else.
I'm practically 5 min away so it should be cake for me to break away.

Eddie, are you coming out to EMW on Saturday?

[lagadula]

Latelly but for the record:

16524

Possible Symptoms
Malfunction Indicator Light (MIL) faulty
Possible Causes
Wiring/Connectors from/to Oxygen (Lambda) Sensor Bank 1 Sensor 2 faulty
Oxygen (Lambda) Sensor Bank 1 Sensor 2 faulty
Possible Solutions
Check Wiring/Connectors from/to Oxygen (Lambda) Sensor Bank 1 Sensor 2
Check Oxygen (Lambda) Sensor Bank 1 Sensor 2

[ess_four]

Thread resurrection:

I was always getting DTC 16524 so I installed new sensors today only to then get 16524 and 17522. Other than the wires/loom what else could be causing the codes? Has one of my cats given up the ghost?

Car has no pre-cats, 200 cell main cats and the sensors are positioned behind the main cat.

Thanks in advance

[B6JoeS4]

I'd say it's a bad cat. Are you using spacers?

[JimmyBones]

If those 200 cell cats are aftermarket parts then you need spacers or a tune because they are not fooling the rear O2s.

[ess_four]

No spacers are fitted but it has been tuned. I think it is the cat. Otherwise both sensors would be giving off similar codes of ot was anoy of the aforementioned.

Thanks