87 Maxima ECM Code 21 Ignition Signal Is Malfunctioning

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87 Maxima ECM Code 21 Ignition Signal Is Malfunctioning

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Since: May 25, 2008
Posts: 12

(Msg. 1) Posted: Sat Nov 01, 2008 5:44 pm Post subject: 87 Maxima ECM Code 21 Ignition Signal Is Malfunctioning Archived from groups: alt>autos>nissan (more info?)

The ECM threw code 21 for ignition system malfunction. There are no drivability problems except that fuel mileage may be lower. I haven't calculation it yet, I am just going by the mileage and previous gauge position. The power transistor fails the continuity test. Power and ground look ok to the ignition module. The manual calls for a logic tester to test the ignition signal to the ECM, which I don't have. Is this possible to have a bad ignition power transistor without any drivability problems or can there be another cause for the code 21? >> Stay informed about: 87 Maxima ECM Code 21 Ignition Signal Is Malfunctioning

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