Vehicle Questions and Answers
Welcome to the Vehicle Q&A Hub. Find answers to your automotive questions, share your experiences, and get expert advice on vehicle maintenance, troubleshooting, and more!
6424 views
3 answers
If you've been notified of an emissions system issue on your 2017 Honda Civic, you'll need to check the diagnostic trouble code (DTC) to identify the problem. The common one you might see is the P0420 code, which points to a fuel injector problem, although there are other emission issues that could cause this error message. Surprisingly, a loose gas cap can also trigger this notification if you don't tighten it securely after refueling. It may sound alarming, but it's a simple fix in that situation.
The emission system issues in the 2017 Honda Civic may stem from various factors, including a clogged fuel injector, malfunctioning ho2s (heated oxygen sensor), or a defective maf sensor.
I've had to replace the purge valve two times already, and now the check engine light is back on. I'm worried about the repair costs. My car has already clocked 117,000 kilometers. It's going back in today to get checked, but it seems like they're unsure about the cause of the issue.