Code PO 300

[Houselr]

Check engine light came on, had the code read with a Bosch reader. PO 300, 3 occurences. 117,000 miles. I changed the air filter as it was due. I have added nor changed nothing engine or performance wise. Any suggestions?

 

[99WhiteC5Coupe]

Year, make, model + engine.

Spark plug and / or wire.

 

[Houselr]

2014 4X4 EL Limited. I agree. Going to change plugs first. Which I see is a royal pain. Any tips on not breaking them off?

 

[99WhiteC5Coupe]

2014 4X4 EL Limited. I agree. Going to change plugs first. Which I see is a royal pain. Any tips on not breaking them off?

There are MANY informative posts on this forum regarding changing spark plugs - you may want to do a search for your year and engine.

The engine / plug change process changed on my year (2015) from your year.

Good luck.

 

[sjwelds]

2014 4X4 EL Limited. I agree. Going to change plugs first. Which I see is a royal pain. Any tips on not breaking them off?

They aren't the kind that break.

 

[Houselr]

Good to know... still wil be careful.