Possible Cause

NOTE:  The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

DTC: P00B3 

• ECT sensor 2 TW2_SENSOR line short to ground

DTC: P00B4 

• ECT sensor 2 TW2_SENSOR line open
• ECT sensor 2 TW2_SENSOR line short to power
• ECT sensor 2 SG6 line open

Common 

• ECT sensor 2 failure
• PCM internal circuit failure