How to fix an emission test failure on car with code 300?
This car have 150,000 miles on it and failed on emission test with code 300 and code 302 ( cylinder misfire) I already changed 2 new ignitions coil at cylinder 2 and 4...but the engine light is still on...
Cars & Trucks - Toyota - ECHO
Answers & Comments
Could also be a fuel injector problem. Code 300 is for a random miss and 302 is for cylinder two. But it does not mean the cylinder has no spark, just that it is not producing power.