Question about 1994 Nissan Pickup

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Error code 51 (injector circuit) on 1994 nissan se v6 pickup

I received this error code (51, injector circuit) on my 1994 Nissan SE V6 pickup. It runs very rough (it seems to be missing on at least one cylinder).

Does this refer to the electrical circuit that feeds the injectors or the injector itself?

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  • Anonymous Mar 30, 2014

    How to remove injectors on 86 Nissan pickup


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I would start by checking the resistance of all of the injectors. I saw this happen last week, I had a new injector that was reading low ohms and it was making two cylinders misfire. Replace the new one with a another new one and both cylinder ran good. I dont know what the ohm value of your injectors should be but I would want at least 10 ohms, All of them will be about the same except the bad one..I did a web search on your problem and it was covered at several places.

Posted on Oct 02, 2008

  • nissanhardbo Feb 04, 2011

    would the mass airflow have anything to do with the wide open injector circuit?


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The exact same thing happened to mine and it was a bad injector. 120$ for a new one but have to remove manifold to get to the injector, ended up just having mechanic replace all of them for a grand.

Posted on Dec 02, 2008

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