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Thomas B2 active Cummins code 4156
Posted to HD/Fleet Forum on 7/9/2021 2 Replies

4UZABRDT0HCHR7074 Freightliner/Thomas B2 Cummins ISB 6.7 CM 2350 ESN 73944784 Built 02-16 Have an active code 4156. "Aftertreatment 1 Diesel Exhaust Fluid Dosing Unit Heater Relay Circuit -- Voltage Below Normal or Shorted to Low Source". We are good thru the ... Login to read more.

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