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- - Code 41 (https://www.corvetteforums.com/forum/corvette-c4-forum-14/code-41-a-4926/)

motomaniac1988

01-31-2007 10:30 PM

Code 41

About 3000 miles ago, I replaced the factory opti-spark with an aftermarket unit made by MSD. Everything was fixed, and recently, i have been having intermittent starting problems. My mechanic finally got it to not start and the computer shows a code 41 which he says has to deal with the opti-spark unit. Can any one help me out as to what might be going on under the hood. I really dont want to have to replace the unit again. Thanks

- David

1992 Corvette Coup wih 97,000 miles

mech259

02-02-2007 10:50 AM

RE: Code 41

You might have a problem with ignition coil driver module. Code 41 is set when the ECM sees a voltage of higher than 4.6 volts on the white EST wire, which might be the driver is shorting out or your coil is creating unwanted voltage spikes.

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