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I was doing an I/M Readiness Test on my Jeep, and saw 'HRT' as one of the failed systems. I've tried googling but have only gotten unclear answers. Does anyone know what this is?enter image description here

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I was wondering whether this should have been HTR for an oxygen sensor heater.

I then found this from here -

enter image description here

It would fit that the O2 sensor and O2 heater both have red crosses against them.

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  • yea I thought this was the case, but when looking this up it was a headache. Thanks for the help! Mar 15, 2023 at 18:20
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    @WhiplashGamz - I see you selected this as the answer, but if it helps you, consider also upvoting it, please. Mar 15, 2023 at 19:09
  • I just did. although at the time I selected it as the answer, it said I wasn't able to yet. Apr 7, 2023 at 15:36

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