DTC B1168: Gauge Control Module Lost Communication With PCM (Engine Messages)

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0) and then back to ON (II).
Wait for at least 6 seconds.
Check for DTCs with the HDS.
Is DTC B1168 indicated?

YES -Go to step 5.

NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections.
Check for Fuel and Emission system DTCs with the HDS (see GENERAL TROUBLESHOOTING INFORMATION ).
Is any DTCs indicated?

YES -Go to the indicated DTCs, then recheck.

NO -Go to step 6.
Turn the ignition switch to LOCK (0).
Disconnect the gauge control module 32P connector.
Jump the SCS with the HDS.
Disconnect the PCM connector A (44P).
Check for continuity between gauge control module 32P connector terminals No. 20 and No. 19 and PCM connector terminals A (44P) terminals No. 36 and No. 37 respectively.

Fig 1: Checking Continuity Between Gauge Control Module 32P Connector Terminals No. 20 And PCM Connector Terminals A (44P) Terminals No. 36
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ), and recheck. If the indication goes away, replace the original PCM (see PCM REPLACEMENT ). If the DTC is still present, replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).

NO -Repair an open in the wire.