DTC Troubleshooting: P0600 (K20C2) - Honda Civic FC/FK 2016-2021

DTC Troubleshooting: P0600

DTC P0600: PCM Serial Communication Failure

NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description	Confirmed DTC	Pending DTC
P0600 PCM Serial Communication Failure

Problem verification:

Problem verification

?1.	Turn the vehicle to the ON mode.

?2.	Clear the DTC with the HDS.

?3.	Turn the vehicle to the OFF (LOCK) mode.

?4.	Start the engine, and let it idle 5 seconds or more.

?5.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC
P0600 PCM Serial Communication Failure

Is DTC P0600 indicated?


	YES

The failure is duplicated. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0600 goes away and the PCM was substituted, replace the original PCM.?


	NO

Intermittent failure, the system is OK at this time. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?