My check engine light gives me 3 codes. 12, 21 & 52. what do these codes mean? It's a 1995 Dodge Ram 2500. codes 12 & 21
I don't have a dodge ram but the codes for the dodge vehicles where pretty much the same. For my intrepid the codes read for the following numbers
12 - Problem with battery connection (This usually happens if you disconnect the battery)
21 - Problem with the oxygen sensor circuit
52 - Oxygen Sensor signal input indicates rich mixture during engine operation.
It sounds like you may need to change an oxygen sensor. Hope this helps.
SOURCE: engine diagnostic codes
12..Battery was disconnected within the last 50 key-on cycles (Resets after 50)
They dont list the others may want to recount the flashes..
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1997 Dodge Ram 1500 has code 12, 21 and 52; however airbag light won't go out. I had previously disconnected the ground wire to battery and now this problem. Can anyone help?
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