Civic L4-1.7L CNG (2003)
![background image](/honda/civic/l4-1.7l_cng/Page-1027003.png)
YES - Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck.
If the symptom/indication goes away with a known good PCM, replace the original PCM.
NO - Replace the injector relay.