ECU Error Codes (VTX 1800)
Posted by Bare | Last Updated March 19, 2015This is a list of the FI light error codes that the stock ECU will flash. The FI light is sometimes referred to as the MIL light which is short for “malfunction indicator lamp”. The MIL is the red light labeled “FI” on the dash panel, it lights up momentarily after you turn the key on before you start the bike. Remember when counting these flashes that there are long (1.3 second) flashes as well as short (.5 second) flashes. The long flash represents 10 flashes while the short flash represents 1, this means that one long flash followed by 3 short flashes equal error code 13.
Self-diagnostic procedure
With the kickstand down start the engine. At this point if there is a problem the MIL should start flashing a code. The MIL will only flash a code with the kickstand down AND the engine idling at less than 5000 RPM’s.
If this procedure fails to generate a code you can search the ECU’s memory for the last code it flashed. Turn the key off and remove the seat. Under the seat locate the ECU service check connector, if you have a pre-04 VTX then you are looking for a 3 pin black plug with 2 wires (green and brown) entering the back (see pic). If it is an 04 or newer VTX then you are looking for a 4 pin red plug with 4 wires (green, brown, green/orange and black/white) and a red snap-on cover.
Neither plug should be plugged into anything.
You can also find additional information and pics about this process on my forums at this link. The information found there is especially important to read if you have the 04+ VTX with the newer red plug.
Using a small piece of wire short out the 2 wires in the connector (use the wire to connect the 2 terminals in the plug). Turn the key on and flip the kill switch (big red button in right switch housing) to the on position. If there is an error code in the ECU’s memory the MIL will start to flash the code as soon as you turn the key on. If there is NOT an error code in the ECU’s memory then the MIL will just light up and stay on.
Once you have an error code you can reference the table below to find out where your problem is.
At this time I have refrained from listing the exact procedure for troubleshooting every single cause because there are about 40 pages of detailed instructions in the manual outlining the procedures – many requiring special tools.
| VTX 1800 ECU Error Codes | ||
| # flashes | Symptoms | Causes |
|---|---|---|
| 0 (no flash) |
Engine doesn’t start |
|
| Engine operates normally |
|
|
| 0 (stays lit) |
Engine operates normally |
|
| 1 | Engine operates normally |
|
| 2 | Engine operates normally |
|
| 7 | Hard start at low temps |
|
| 8 | Poor engine response when operating the throttle quickly |
|
| 9 | Engine operates normally |
|
| 10 | Engine operates normally |
|
| 11 | Engine operates normally |
|
| 12 | Engine doesn’t start |
|
| 13 | Engine doesn’t start |
|
| 18 | Engine doesn’t start |
|
| 19 | Engine doesn’t start |
|
| 21 | Engine operates normally |
|
| 23 | Engine operates normally |
|
| 33 | Engine operates normally but does not store self-diagnosis data |
|
Sensor locations
While this isn’t the best picture in the world it should give you a decent idea of where to find things:
[…] You can check troubleshooting here […]
2003 VTX1800S Engine turns over but will not crank. F1 light will not illuminate and I can not hear the fuel pump prime. Have shorted the service check connector with no response.
Same motorcycle, same problem. Changed out the exhaust, put on a hyper charger, and installed a power commander 5. Can not get the pump to prime. Any help would be appreciated.
Great answers about the F1 codes and great diagram of the bike’s sensors and troubleshooting analysis.
My 2003 honda vtx 1800C flash is one slow and seven fast.
What would this mean?
Turn key on and light comes on right away then 3 flashes.
No gas getting to injectors or throttle body
Put rag with gas fumes it fires
Nothing after that.
After I start up my 03 Retro I get 2 long and 4 short flashes. Can you help me with what this means
Thanks
I once had this problem, it disappeared by itself quickly. But today she reappeared. I don’t know anything about her either and I’m asking for help.
VTX1800S 2003.
have a 2003 VTX 1800, It starts and runs rough and then it starts to pop, it has been desmogged since that was the first advice I got. Any suggestions.
Since it has been desmogged I’m guessing you have after market air intake and possibly exhaust. If that is the case you probably have a fuel controller like a power commander. If you do have a power comander it is likely that it is attagged by an alligator clip. Check that wire and connection, make sure it hasn’t seperated the wire. There is a whole fix on this
I just installed my new vance and hines exhaust on my 2005 honda vtx1800r.
My F1 light stays lit, but engine starts and no power loss, I have ordered my power commander, should that fix that problem. I currently have the same set up on my other 2005 vtx1800r, and the f1 light goes out once I start that bike
I have an 02 vtx 1800c. Starts up and runs fine untill its warm.ill give it throttle while riding and the engine sputters like it wants to shit off. I pull the clutch in and it idles fine. I got an fi code of 8 short flashes. Any help will be greatly appreciated.
I also have a 02 Honda VTX 1800 fi light is blinking eight times and having the same problems did you ever find out what was going on
I’m a sort of a technician. VTX 1800C 2002. 54k km on odo. Strange situation. Ground fixed, FPR replaced, new spark plugs, no errors. Fuel primes. Engine cranks, but fires up only after very long staring. Tried different combinations of neutral and kickstand. No effect. When it’s warm, starts with absolutely no problem. I have no more ideas. What to change/test next? Thank You!
I have a2006 vtx 1800f3 I keep blowing main or fuel pump fuse I changed the angle bank censor fuel pump relays did ground fix still popping fuses really could use some help
I have a VTX 02, I had a wire burn out through the fan. Replaced the wire, the bike runs great, but F1 is doing the 5 second flash. I have changed the fuel down to regular in hopes that will fix it. Gonna ride later this week when weather breaks.
my vtx 2003 fire comming out the intacke
Call the Fire Department
no speedometer (or odometer) readout, also, after a very short ride I get an FI light
Sounds like the speed sensor. Located in front of the Rear tire. Mine had the same exact problem.
While riding bike shuttle FI light flashes switch bike off and starts back up ride a while and shuts down again.
I have a 2003 honda VTX 1800cc the FI light came on 1 long flash and 2 Short Flashes then After that, I get one long flash Then 3 short Flashes. Anyway, you can let me know what these codes are Reading. And again I have a Honda VTX 1800cc 2003 I would really appreciate it. And thank you.