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Code 51

8

8T4Gold

Guest
;help So we took the '84 for a spin today.(our first time out with this car). During our time away from home, the check engine light came on. I hastily checked all temps and pressures, all were OK. We put on about 300 miles, and when we got home, pulled up code 51. What does this mean, and how do we fix it? The car seemed to run fairly well. ;shrug
 
Joined
Aug 30, 2002
Messages
1,533
Location
Colorado Springs, CO USA
Corvette
84 Z51 auto R.I.P. 89 black roadster SOLD
Code 51 is pretty serious...it means the EPROM in the ECM is either failing or has failed, and it may be running in "limp home" mode.

Try disconnecting the battery...pull the ECM down, remove and re-install the EPROM...it could be just a flaky connection on one of the EPROM pins. Put it all back together and see if the code 51 comes back.

If it does...whatever you do...do NOT go spending hundreds of dollars on a replacement EPROM! Shoot me a PM and I can send you a stock replacement EPROM.

Bill
 

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