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Engine Check Light

eaglenest61eaglenest61 Member Posts: 1
edited August 2016 in Ram
I have a 2012 Ram 2500 ST with a 6.7L Cummins Turbo in it. It's got right at 79k on the engine. I just bought this from the dealer less than a month ago and I've had it in the shop 4 times due to the engine light coming on. The second time, they replaced the O2 sensor on the catalytic converter. Light came on a week later again; took it back and they said they had to replace the Oxygen sensors and would order them. The fourth time in to have sensors replaced. It's been a week and today, the engine came on again! I think they are parts changing instead of fixing the problem. The only positive about all this is they are doing under Chrysler warranty since I just bought this from them.

Can anyone give me an idea why the light keeps coming on? I thought maybe the gas cap was loose; but after taking it off and putting it back on, the light is still on.
When the light came on; the truck seemed to "caugh", if that makes sense. It runs great once you're cruising; but tends to hesitate while shifting.


  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    We'd need to know what codes are being read. Nobody can really tell you what's wrong without proper hands-on diagnosing, but if we had the codes we could list some possibilities at least.
  • thecardoc3thecardoc3 Member Posts: 5,745
    Search for Chrysler TSB 25-002-14.

    This bulletin involves the installation of an Oxygen (O2) Sensor Overlay Harness for any
    Oxygen Sensor related DTC(s). The Overlay Harness will consist of twelve 18 AWG wires
    (six from each Oxygen Sensor) that run to a new Oxygen Sensor Module connector. Four
    wires will be removed from the original vehicle O2 Module connector and installed in the
    new overlay harness O2 Module connector.
    Do NOT replace any parts prior to performing this bulletin and the Verifications test below.
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