P3003

P3003 OBD Code Definition:
P3003 Engine coolant heater relay 1, low output
P3003 OBD Code Description:

OBD Code P3003

Engine coolant heater relay 1, low output

One thought on “P3003

  1. Jeremiah Gwynn

    I have a code P3003 power train code that came on my Nissan Xterra 2006. I have looked everywhere on the internet and cannot find a code relating to this. I am a master mechanic and have been working on vehicles for over 20 years and have never come across this code. my vehicle seems to be running perfectly fine. but after I erased the code 3 weeks to 4 weeks later it pops back up. please help me to identify this code and what it means. I would really like to know if this is just a faulty code or if this is something that my code reader is picking up which isn’t actually a code that I can find or represents another code that stands for 2006 Nissan Xterra. please advise as soon as possible as I need to have my vehicle emission and inspection ed as of last month. Thank you, Sincerely, Miah Gwynn….

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