Re: [GS-911] Oxygen sensor fault code - cylinder numbering

[Ted Damen]

Hi Tim,

Maybe you could diconnect this faulty sensor and find out.

I guess the left one (sitting on the bike) is nr 1

regards,

Ted

----- Original Message -----

From: Tim

To: gs-...@googlegroups.com

Sent: Thursday, April 18, 2013 11:41 PM

Subject: [GS-911] Oxygen sensor fault code - cylinder numbering

Hi folks,

I used my GS-911 in anger today to investigate poor running on my R1200GS.

I had suspected a faulty oxygen sensor, and low and behold the GS-911 confirmed my suspicions with a fault code indicating the sensor for cylinder No 1 was to blame.

Can anyone tell me which cylinder is number 1?  Is it the one on the right or left (as you sit on the bike)?

Thanks.

Tim

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[Bosun Adegboye]

A wise man will be master of his mind
A fool will be its slave.

[Dave McDougall]

According to the BMW Motorrad Repair Manual for my 2011 R1200GS, the right cylinder, as you sit on the bike, is cylinder # 1.

 

I strongly recommend that everyone who uses the GS-911 also buy one of the BMW Motorrad Repair Manuals on DVD as it very handy.

 

Best regards,

 

Dave McDougall

[Kobus Grobler]

Sitting on the bike Cylinder 1 is on the right hand side.

Best
Kobus

On 2013/04/19 10:51 AM, Ted Damen wrote:

[Don Eilenberger]

At 05:41 PM 4/18/2013, Tim wrote:

>Hi folks,
>
>I used my GS-911 in anger today to investigate poor running on my R1200GS.
>
>I had suspected a faulty oxygen sensor, and low and behold the GS-911
>confirmed my suspicions with a fault code indicating the sensor for
>cylinder No 1 was to blame.
>
>Can anyone tell me which cylinder is number 1? Is it the one on the right
>or left (as you sit on the bike)?
>
>Thanks.
>Tim

It's the starboard side (which makes more sense then having to remember the
direction if sitting or facing the bike..)

BTW - you may want to carefully examine the wiring for the O2 sensor, right
back into the harness. My R1200R had some bad running symptoms, that I
tracked down to the port side O2 sensor. Replaced it with a known good
spare I have - and the problem remained. Turns out BMW had routed the
wiring harness too close to an edge of the transmission and time/vibration
had worn through the insulation, grounding the O2 sensor out.

Re-insulating the wire, then putting some protective plastic sleeving
around it and rerouting it a bit solved the problem. BMW also loves to
over-tighten tie-wraps, so you may want to check the wiring under any
particularly tight ones also.


Don Eilenberger, Spring Lk Hts, NJ
deilen...@verizon.net

[Tim]

Thanks for the tip Don - I shall check out the wiring as you suggest.

And thanks to everyone else who has replied. 

I had suspected it was the starboard (right) side, but just wanted to check to save me a little bit of extra work unplugging and retesting!

I had the other O2 sensor fail a couple of years ago, and the symptoms were much the same.  Back then it took a dealer 3 weeks to track down the fault (needless it didn't show on the official computer)!  One of the many reasons why I started servicing my bike, and getting hold of a GS-911... ;)

Thanks again.

Tim

[Willy Vega]

The right cylinder is the number 1. When you are sitting on the bike is on the rigth hand side.

 

 

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Wilfredo Vega Vega
wfv...@gmail.com
Telf. 59144443545
Cel. 59176402500
Cochabamba - Bolivia

[Bennett Samson]

I've had the same error, and can't even follow the wire much less find the fault. So just living with it. Fuel is cheaper than dealer service.

Sent from my iPhone

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[Julian Davidson]

Had a go at seeing if my GS would float so I could figure out which side is
the starboard side.....

-----Original Message-----
From: Bennett Samson
Sent: 19 April 2013 21:42
To: gs-...@googlegroups.com
Cc: gs-...@googlegroups.com
Subject: Re: [GS-911] Oxygen sensor fault code - cylinder numbering

I've had the same error, and can't even follow the wire much less find the
fault. So just living with it. Fuel is cheaper than dealer service.

Sent from my iPhone

On Apr 19, 2013, at 9:59 AM, Don Eilenberger At 05:41 PM 4/18/2013, Tim

[Dual Sport Motorcycle Clinic]

RHS cylinder, sitting on the bike as has been mentioned.

These are standard Bosch 4-wire O2 sensors, available at your closest Bosch
Automotive/Diesel-Electric dealer. Failing that, visit your closes scrap
yard. These same sensors are used on 99% of German vehicle ie. BMW, Audi,
MB etc, etc.

Regards
Guy
Dual Sport Motorcycle Clinic.

-----Original Message-----
From: gs-...@googlegroups.com [mailto:gs-...@googlegroups.com] On Behalf Of

[Jeff Edge]

out of curiosity what is the symptoms of a failing o2 sensor?

Sent from my iPhone

[Tim Barnes]

In my case the bike runs a too rich fuel/air mixture in the cylinder with the faulty sensor. This causes very rough handling at low revs with a tendency to stall. Fuel consumption may increase, the exhaust runs sooty at high revs, and you may see soot on the spark plugs as well. Lots of popping from the exhaust as well!

All of this only become apparent as the engine (and O2 sensors) reach normal operating temperature. Starting from cold seems to be as usual.

Tim

[Tim]

Just a quick update for anyone interested...

I checked the wiring and connectors as Don suggested, but no obvious worn areas so I sourced a replacement O2 sensor from Motorworks.  I fitted it tonight and used the GS-911 to get the bike computer to relearn the sensors.  All went very smoothly.  Cleared the fault codes, and went for a short ride, and hey presto, all back to normal!

A happy ending for once.  Saved myself a few quid and the inconvenience of booking into a dealer to do the same job.

Thanks again for your advice.

Tim

On Friday, April 19, 2013 2:59:00 PM UTC+1, Don Eilenberger wrote:

[Tim Burton]

Hi Guys 

I have a R1200GS 2008 and discovered a faulty No1 Lambda sensor 14mths ago using the gs911 initial voltage upon startup cold should be simular on no1 and no2 sensors as warmup progresses they should have simular voltages also you should check Plot charts and readings are supposed to spike up and down on both cylinders (look online for example charts to get an idea of what a normal situations is). Apparently the sensor voltage turns on and off as it reads the amount of oxygen passing the sensor, this voltage tells the ECU to meter fuel at each cylinder at idle and constant throttle positions to allow good air/fuel ratio's for the Cat convertor to operate at the best temperature and supposedly optumim fuel/air ratio for optumim combustion. 

My inital settings on warmup where No1 14 mVa  and  No 2 - 800mVa looking at the chart Plots No 1 is a straight line at the bottom of the chart and No2 is spiking up and down as per normal.

My research came up with the need to replace these sensors together as they do wear out gradually over time due to heat and give poor fuel economy and rough idle and cutout on backing off after revs say coming to a stop as a telltale sign as they fail to give proper reading the tend to make the mixtures rich and this added heat can cause faster failure and apparently the Cat convertor can overheat and fuse the honeycomb thus restricting exh flow

Today I suspected Oxy sensor problems poor idle excess fuel usage and cutout at fast stopping situation ie traffic light with camera and put the gs911 on and I have the same  problem hase shown up No1 sensor at warmup 15mVa and No2 750mVa this time i shall recheck connections and install a spare i have. 

stay tuned for outcomes

[Wesley Patterson]

Tim

I have similar performance on my 2010 for a long time now though not as bad as yours.  Dealer blamed the cut out at fast stops on dirty injectors.  How are these O2 sensors replaced?  I understand that they are unscrewed from the exhaust but where do the wires unplug?

Wes

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[Bernard Rocha]

Hi guys!

No. 2 Parts are the OxygenLambda/Sensors. Hope this diagram helps, as to where the connectors are.

Bernard

Sent from my iPhone

[Bernard Rocha]

Here's another illustration of where the harness went, so you can just follow the trail, up to the connectors.

Hope this helps.

Bernard

Sent from my iPhone

On Aug 11, 2016, at 2:54 AM, Wesley Patterson <wesley.p...@sbcglobal.net> wrote:

[Trevor Williams]

I see all these  O2 sensor problems.  Also measured cranky readings and decided to chemical clean then. Perfect is the word I will use since then. 201500 km later still economical and good readings on both.
Trevor.

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[Karl Hutchinson]

Trevor,

What product did you use to clean your sensors?

Karl

[Trevor Williams]

Hi Karl,
I used a very light mix of pool acid. Say about 20% acid and rest normal tap water.
Gave it a dump on the sensor area for about a minute and the pressure wash.
If it did not look clean, repeated for another minute.
Washed and fitted back.
Tested on the GS911 and all sorted.

[Wesley Patterson]

Hi Trevor

What is "pool" acid?

Wes

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[Maurice]

so what is your chemical cleaner, may help others

Maurice
mclay...@aol.com

[Gary W. Gerfen]

At 07:55 AM 8/15/2016, Wesley wrote:
>Hi Trevor
>What is "pool" acid?
>Wes

Hi Wesley,

Not Trevor, but pool acid, available from
swimming pool supply stores and places like
Home Depot, Lowes, etc. in the U.S. is usually 20° Baume, 31.45% Muriatic acid.

Gary

[Trevor Williams]

Morning all,
5h46 am in South Africa now. Cold 8 degree Celsius.  Swimming pool acid. The type used & added to swimming pools to correct the PH.  Same as Hydrochloric Acid. Installed and programmed my back ESA shock on the bike last night. All well. Also checked the oxygen sensors at the same time. They are still working well with a light throttle ride giving me an easy 22 km/lt. Normal brisk riding giving me 18.5 km/lt.
Upcoming 2500 km trip starting on the 20th August.  The GS911 goes with for the in case case diagnosis with the cell phone assisting. Has save myself and a few friends on the road to get going again. Trevor.