Check Engine Light

What was/is the code?? We need that info to help you

Hey Tusconmax1. I tried getting it from them, but the service was a while ago, and they didn't document the code. I will try bringing it back to them and see if they can do their jobs this time, but was hoping someone else has seen the check engine light go on and off. I am accustomed to it coming on and staying on, but not on and off. I will see if the dealer can help out this time, but hate to have to pay them again for something they should have documented the first time.

I had the bike checked out again today and they gave me a copy of the DTC readout. The codes were P0152 - engine running rich (rear), P0506 - idle speed control (rpm too low), and P0507 - idle speed control (rpm too high). One of the technicians said that it may be a rotor issue. Problem with that is that the warranty expired last month. Ca-ching! Any thoughts?

Hard to say. Possibly several things going on.


On a Car, I would use a Scan Tool to monitor the O2 Sensors. Rich Exhaust could be a Bad Sensor.


The Idle Speed Codes?? Both High and Low. My thought would be to check the Crankshaft Sensor. Again on a Car, I would use a DVM. Set for AC. And monitor the output of the Crank Sensor. I Diagnosed a car once with a Speedo Inop. Started with the Vehicle Speed Sensor. Had output. Checked at the Engine Computer. Had Input. There was no Output to the Speedometer. Told the Boss. He didn't believe me. Had another Tech check it. Same conclusion. Could be a Bad Crank Sensor. Or Wiring.

Just wanted to post a quick reply, as this issue has been resolved. The issue was a bad air intake adapter (boot). Apparently, the adapter had a hole in it, that someone, prior to me, must have rigged with a hose clamp. They clamped it so tight, that it was choking the engine of air, throwing the rear cylinder running rich code. And the idle speed control low, and the idle speed control high, was the engine trying to correct itself. The dealer covered the labor on fixing this, as it should have been remedied last August, when I brought the bike in for the same issue.

mccarthyej said:

I have a recurring issue with the check engine light coming on pretty consistently. It seems to come on after being run for a while and coming to a stop, but then goes off when moving... I took it to a local H-D dealer, and they said that it was a historic code, cleared it, and didn't offer anymore detail. Has anyone else had an issue like this? Looking for some guidance, or thoughts on what to check. Thanks in advance!

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Im getting the CEL quiet often. Once my bike suddenly lost speed while riding above 80km/hr with the CEL on i pulled over with the engine giving out an uneven firing and died. Switched off the ignition put it back on. rode for a km and the light came back although this time the bike did not stall. I showed it at the dealership and they said there weren’t any codes generated. What are your thoughts and expert comments?