Code 25 !!

[Bruce01]

Hello, I'm a new member and also new to this Honda model ( 2002- 1300). Advise if you have any - this is a European model - I'm based in the UK and the bike is showing code 25 . Is this a common code on this model, and what could be the issue apart from the sensor ? .
Regards
Bruce

 

[dduelin]

Hello, I'm a new member and also new to this Honda model ( 2002- 1300). Advise if you have any - this is a European model - I'm based in the UK and the bike is showing code 25 . Is this a common code on this model, and what could be the issue apart from the sensor ? .
Regards
Bruce

Yes it is fairly common and if replacing the indicated knock sensor doesn’t remove the code then unfortunately it’s probably the ECU.

 

[Bruce01]

Yes it is fairly common and if replacing the indicated knock sensor doesn’t remove the code then unfortunately it’s probably the ECU.

Thanks for the heads-up on that. If it is the ECU, are they repairable ? just thinking what's the chance of getting a good used one !

 

[Mellow]

Thanks for the heads-up on that. If it is the ECU, are they repairable ? just thinking what's the chance of getting a good used one !

No one has been successful in fixing one, replacement is the only fix or just living with it. They are hard to find these days.

 

[Bruce01]

Thanks for getting back to me, appreciate the response. Hopefully it's just the sensor !!

 

[woodybelle]

Swap the sensors side to side and if the code changes to a 26 then it is the sensor. The wiring harness is in a very hot location and some members have fixed this code by replacing the harness. Also the wiring must be checked for continuity and no shorts. to ground between the sensor and the ECM for a complete diagnosis.

 

[Bruce01]

Again thank you guys for taking the time to answer my question.
I'll swap sensors, check wiring hopefully over the weekend.
I've only had the bike for two weeks, it's a shame I already have an issue
. Having said that I like the ride and looking forward to many trouble free miles ahead ! I hope)

 

[irunamok]

Again thank you guys for taking the time to answer my question.
I'll swap sensors, check wiring hopefully over the weekend.
I've only had the bike for two weeks, it's a shame I already have an issue
. Having said that I like the ride and looking forward to many trouble free miles ahead ! I hope)

Two weeks? Luxury! My 1100 broke down on the fly-n-ride way home! Halfway home from Tennessee to Texas the alternator gave up. She's fixed now and an absolute beast. I don't blame the forum member PO, who is a good guy; it's just the bad luck of an old bike. I don't regret it for a second. I hope you have great luck with your bike.

 

[Bruce01]

Two weeks? Luxury! My 1100 broke down on the fly-n-ride way home! Halfway home from Tennessee to Texas the alternator gave up. She's fixed now and an absolute beast. I don't blame the forum member PO, who is a good guy; it's just the bad luck of an old bike. I don't regret it for a second. I hope you have great luck with your bike.

Oh No !!
How unlucky, I'm fortunate that the UK is not that big compared to the US so large distances are not a major issue.
I've not experienced an 1100, are they vastly different ? .

 

[Uncle Phil]

Oh No !!
How unlucky, I'm fortunate that the UK is not that big compared to the US so large distances are not a major issue.
I've not experienced an 1100, are they vastly different ? .

Yes - two different animals yet they do have their similarities.

 

[Bruce01]

Nice
Hopefully I'll get the opportunity to experience one, just for the comparison .

 

[SMSW]

Nice
Hopefully I'll get the opportunity to experience one, just for the comparison .

You better hurry up. Phil is trying to corner the market on 1100's. At least the two of you are separated by a few thousand miles of water so you are not competing with him.

He owns 8 ST1100s.

 

[RobbieAG]

I had code 25. It turned out to be the ECU after I eliminated all the other possibilities. I did have a perished knock sensor connector which I replaced, but it didn't solve the problem. There are no new ECUs available, so eBay or a used one sourced elsewhere is the only option. Thankfully I was able to get one, but it took a while. FYI - you can continue riding the bike with code 25. You won't get stuck.

 

[Bruce01]

I had code 25. It turned out to be the ECU after I eliminated all the other possibilities. I did have a perished knock sensor connector which I replaced, but it didn't solve the problem. There are no new ECUs available, so eBay or a used one sourced elsewhere is the only option. Thankfully I was able to get one, but it took a while. FYI - you can continue riding the bike with code 25. You won't get stuck.

Again thanks for the response, yes I did continue to ride with the Fi light on. From reading more info, I assume it makes the AFR richer and also retards the ignition making the mpg worse ! . With the costs of premium fuel in the UK It's a shame there's not an aftermarket ecu replacement or fix to solve this

 

[Buckeyechris]

Again thanks for the response, yes I did continue to ride with the Fi light on. From reading more info, I assume it makes the AFR richer and also retards the ignition making the mpg worse ! . With the costs of premium fuel in the UK It's a shame there's not an aftermarket ecu replacement or fix to solve this

Bruce,

Sorry to hear you've got the dreaded FI code 25. It happened to me and my 05 ST. I went through the troubleshooting process outlined in the Honda Service Manual. Unfortunately, it was not the sensors. I also had continuity in the wiring to the PGM-FI (aka ECM). Sadly, the EMC for 02-07 American models are no longer in production. However, I found a police ECM in Japan, which works as a substitute. The P unit is speed-limited to 120 mph, but I rarely ride close to that speed.

I did some quick research online, and it looks like the UK ECM for 2002 is part number 38770-MCS-G02. If your problem isn't a sensor or the wiring, CMSL.com suggests that you might be able to purchase a replacement ECM. Hopefully, your code can be cleared without purchasing a new ECM. Best of Luck!

Chris

 

[wizel]

1702 Euro
holm from germany

 

[Bruce01]

Bruce,

Sorry to hear you've got the dreaded FI code 25. It happened to me and my 05 ST. I went through the troubleshooting process outlined in the Honda Service Manual. Unfortunately, it was not the sensors. I also had continuity in the wiring to the PGM-FI (aka ECM). Sadly, the EMC for 02-07 American models are no longer in production. However, I found a police ECM in Japan, which works as a substitute. The P unit is speed-limited to 120 mph, but I rarely ride close to that speed.

I did some quick research online, and it looks like the UK ECM for 2002 is part number 38770-MCS-G02. If your problem isn't a sensor or the wiring, CMSL.com suggests that you might be able to purchase a replacement ECM. Hopefully, your code can be cleared without purchasing a new ECM. Best of Luck!

Chris

Chris
Thank you for the info, as you said hopefully I don't need a replacement We'll see !!.
This was my first post, with my new bike and I must say thanks to all who responded. Great site