DTC C1280: Engine Circuit Malfunction [08/2020 - ]: Procedure

1. Check if the engine control system DTC is output.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   Engine control system DTC is not output	A
   Engine control system DTC is output	B

Result: 

A 

REPLACE 4WD ECU ASSEMBLY. Refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

B 

GO TO ENGINE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 - 08/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - 09/2022]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2022 - ]