1. Home
  2. Hyundai Cars and SUV Forum
  3. Po171 /02 03

Po171 /02 03

2001 Sonata 2.4 engine Here is what the car is doing. When the car sits usually overnight when i drive for the first few minutes the car lunges as if i?m driving fast. the car then drives normally this only happens if the car been sitting for a long time (overnight ) I got the code po171 01 02 . I change the air filter and clean the MAF sensor light went out and drove better for a few days. then the code came back po171 03 The lunging problem seem to be the throttle as i have not check that yet been searching this problem for about 4 weeks. sometimes the lunging goes away for a few days and then returns. I also clean the throttle body with throttle body cleaner. Any way i can check to see if the throttle sensor is the culprit .Any help appreciated When i drive around 100 kmh i can feel a slight hesitation but once i go over that speed the car runs great. I?ve also been checking for vacuum leaks so far no luck if i can?t find the problem soon i will have the dealer check it out. I just don?t want to throw parts at the problem
Reply to
cypto
Loading thread data ...

Check for air leaks into the engine-- especially the PCV hose.

Finding none, a P0171 problem is typically the air flow sensor. Cleaning the sensor often yields poor results. Most likely, you'll need to replace it.

I don't know what 01, 02, and 03 indicate. Can you elaborate?

-- Message posted using

formatting link
information at
formatting link

Reply to
hyundaitech

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.