Code P303 - Toyota Nation Forum : Toyota Car and Truck Forums
Highlander 1st Generation (2001-2007) Forum dedicated to the discussion of 1st generation Toyota Highlanders.

 
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post #1 of 4 Old 05-21-2019, 07:07 PM Thread Starter
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Code P303

I have a 07 Highlander with 206,000 miles. I got a code P303 for the cylinder 3 misfire. I’ve changed the coil and all 4 spark plugs. I even exchanged the new coil thinking it was faulty because the code kept on. What the car does is it tugs when I try to go past 40 mph. It then kind of starts loosing power. Could it be the cam position sensor? Thanks
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post #2 of 4 Old 05-21-2019, 07:14 PM
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Have you followed the manual procedure to check for spark?
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post #3 of 4 Old 05-22-2019, 06:21 PM Thread Starter
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Yes I have
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post #4 of 4 Old 05-23-2019, 01:12 AM
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Ok- I thought it might be the signal from the control module but if you are seeing a spark then that is probably not it.
Maybe others see it differently but I think if the cam sensor is off enough to cause a miss that would set P303 then you would get a code for timing mismatch between the crankshaft and cams, and I would expect a P300 code. I would look at fuel next. How does it idle? Can your scanner read the misfire counts?
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