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ECU(Electronic Control Units) replacement for check engine light on.


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Hi All,

I got the FWD 2.7L v6 R/T journey three weeks ago in China, everything goes well but the check engine light has being on since a week ago. I took it to the dealer yesterday, after check, they told me that the problem code is p0161, O2 sensor dosen't work since it could not reach the work temperature, but they could not find any issue from O2 sensor,also other spare parts. they thought maybe its a ECU bug then they updated the ECU's routine downloaded from Chrysler's website,but the light is still on.

Finally, they decided to order a new ECU for my journey, it will arrive in about a half month.

Anyone got the same issue? and I wonder whether ECU replacement will cause other issues?

Thanks a lot :)

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Hi All,

I got the FWD 2.7L v6 R/T journey three weeks ago in China, everything goes well but the check engine light has being on since a week ago. I took it to the dealer yesterday, after check, they told me that the problem code is p0161, O2 sensor dosen't work since it could not reach the work temperature, but they could not find any issue from O2 sensor,also other spare parts. they thought maybe its a ECU bug then they updated the ECU's routine downloaded from Chrysler's website,but the light is still on.

Finally, they decided to order a new ECU for my journey, it will arrive in about a half month.

Anyone got the same issue? and I wonder whether ECU replacement will cause other issues?

Thanks a lot :)

I had the same problem, check engine light kept coming on. The computer would tell them it was an O2 sensor. It was changed twice and the light still came on. My truck turned out to be a lemon and was bought back by Chrysler. It had other engine problems besides the check engine light and O2 sensor.

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I had the same problem, check engine light kept coming on. The computer would tell them it was an O2 sensor. It was changed twice and the light still came on. My truck turned out to be a lemon and was bought back by Chrysler. It had other engine problems besides the check engine light and O2 sensor.

Thanks for the replay.

You mean O2 sensor was changed twice or ECU?

It's impossible to be bought back here.

The only thing I can do is hope the issue could be resolved ASAP.

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