Kia Rondo Codes P0420 and P0336 Diagnostic help - Kia Forum

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post #1 of 2 (permalink) Old 05-24-2019, 04:50 PM Thread Starter
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Kia Rondo Codes P0420 and P0336 Diagnostic help

Hey All! So I got a used 2009 Rondo LX 4 cylinder. It had been sitting for a while so once we got it driving a whole slew of codes came on. Changed the downstream 02 sensor and they cleared up. Changed the spark plugs for good measure as well.
After that the P0420 code came on, followed closely by the P0336.
The symptoms are that the car sometimes jerks during drive, could be while it's trying to shift, then on the highway it'll stop accelerating. My foot will be on the gas, and the speed will start declining. All the lights then come on, but if I pull over, turn it off and restart, then it goes again. Once or twice it's actually just shut off when I'm parked or stopped at a light. Also, when I go to accelerate from stop lights, sometimes it just doesn't go, doesn't go, then starts moving like a sloth going through a mud puddle, and then finally picks up speed. The check engine light will come on, and then randomly go off, only to reappear again later.

I'm not 100% sure where to start on it. I have an OBD II scanner and the android version of Torque, but honestly dont know what on earth half of it means. 🙂 😉 I could just start replacing crank and camshafts sensors, but figured I'd check with all of you first.


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post #2 of 2 (permalink) Old 05-26-2019, 10:47 AM
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P0336 crankshaft position sensor. Yes article describes your symptomes
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P0420 .... Good info to start ....

I saw it's a Rio but could give you ideas

2008 Kia Rondo EX 2.7L 86k miles
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