definitely annoying
Typical Repair Cost:
Average Mileage:
102,000 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. not sure (1 reports)
2003 Honda Civic electrical problems

electrical problem

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2003 Honda Civic Owner Comments

problem #1

Jun 162009

Civic SI 2.0L

  • Manual transmission
  • 102,000 miles


engine light came on, car was still running fine. ran a self-diagnostic with a home tool and reported both O2 sensor failure. replaced both O2 sensors myself $200. cleared the light and after 24hrs light came back on. same codes so i exchanged the O2 sensors thinking they were faulty. light came back on again after 24hrs. tested fuses, fuses good. took it to the dealer, ran a diagnostic $95. same codes both faulty O2 sensors. explained to the dealership that they had already been replaced twice. dealership stated that since they were not "official" honda brand O2 sensors that could be the problem. humored them and bought their O2 sensors $600. cleared the light and after 48hrs light is back on. dealership scratching their heads... suggested I buy a new Honda.

in case you don't know the problem is, even though the engine is running fine, the computer sets the car in a "safe mode" running very rich as to not burn out the pistons. this reduces power drastically and increases gas mileage. right now the car is getting around 19 mpg city. my hobby in high school used to be ripping hondas apart and rebuilding them from the ground up... sometimes even combining engines. i have never dealt with a problem like this and its frustrating as hell... if anyone has had the same problem or knows the fix I am all ears!

- , Hampton, VA, USA

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