Jump to content

2010 is250 - P0303


Recommended Posts

Hi,

My is250 has 110k miles and I've haven't performed a spark plug replacement etc (just basic maintenance throughout the years). The CEL came on yesterday with the P0303 code and the car ran real rough. After reading the code, I reset the computer via my handheld scanner. It's ran fine and no CEL after driving 10-15 minutes. Not sure if I should risk driving further.
Any advice would greatly be appreciated.

Thanks in advance

Link to comment
Share on other sites


  • 1 month later...

P0303 means a misfire on cyl 3. I'm new to any Lexus IS250, so you'll have to find a cylinder number diagram to find out which side and what location the #3 cyl is .

The misfire can be a host of things, but a few of the usual suspects are 

Spark Plug (doubt it)

Coil (most probable)

Injector 

 

The easiest thing to do is to clear out the codes and move coil #2 to position #3 (and vice-versa) and see if the PO3xx moves to P0302....If it does that means the coil is bad.
I highly recommend to getting an OEM coil or high-performance coil as some aftermarket coils jus don't cut it.

 

Report back after that test.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



×
×
  • Create New...

Forums


News


Membership