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: P2127 

• APP sensor B APS2 line short to ground
• APP sensor B VCC line short to ground
• APP sensor B APS2 line open
• APP sensor B VCC line open

DTC: P2128 

• APP sensor B APS2 line short to APP sensor B VCC line
• APP sensor B SG line open

Common 

• APP sensor B failure
• PCM internal circuit failure