4×4 Indicator Light Remains On – Diagnostic Trouble Code (DTC) P1839 – 2017 Ford F-Super Duty
SSM 46455 – 2017 F-Super Duty – 6.7L – 4×4 Indicator Light Remains On – Diagnostic Trouble Code (DTC) P1839 In Transfer Case Control Module (TCCM) Some 2017 F-Super Duty vehicles equipped with electronic shift on the fly (ESOF) four wheel drive may exhibit a 4×4 indicator illuminated with DTC P1839 in the TCCM. … Read more