trouble codes
lions83
07-28-2006, 09:15 PM
94 jeep codes 12,21,54,55, light comes on but once you restart it , it goes out until it comes on again, . could it be a small leak in the intake system
Bob D.
07-29-2006, 05:15 AM
This is the info I have on codes--
Code 12: Direct battery input to PCM was disconnected within the last 50 key-on cycles.
21: Neither rich nor lean condition detected from the oxygen sensor input.
54: No fuel sync (camshaft signal) detected during engine cranking.
55: Completion of diagnostic trouble code display on the malfunction indicator lamp (check engine lamp).
Code 21 sounds like a bad O2 sensor, 54 a bad cam sensor.
Code 12: Direct battery input to PCM was disconnected within the last 50 key-on cycles.
21: Neither rich nor lean condition detected from the oxygen sensor input.
54: No fuel sync (camshaft signal) detected during engine cranking.
55: Completion of diagnostic trouble code display on the malfunction indicator lamp (check engine lamp).
Code 21 sounds like a bad O2 sensor, 54 a bad cam sensor.
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