- #2011 CHEVROLET DURAMAX SERVICE DEF SYSTEM RESET DRIVER#
- #2011 CHEVROLET DURAMAX SERVICE DEF SYSTEM RESET FULL#
The two reductant (DEF) heaters are designed to thaw DEF that has become frozen in temperatures below 32☏ (0☌) in the Emission Reduction Fluid Tank and supply line to the DEF injector. If both resistance readings are greater than 10M ohm, continue with diagnostics according to the appropriate Service Information. If either resistance reading is less than 10M ohm, the heater is faulty and the Emission Reduction Fluid Tank should be replaced. Next, measure resistance from pin 10 to pin 14. With the Emission Reduction Fluid Tank wiring harness disconnected, measure resistance from pin 9 to pin 14 using a Digital Multimeter.
![2011 chevrolet duramax service def system reset 2011 chevrolet duramax service def system reset](https://davesoilchange.com/wp-content/uploads/2021/06/best-def-fluid-for-duramax.jpg)
#2011 CHEVROLET DURAMAX SERVICE DEF SYSTEM RESET FULL#
TIP: Be sure that the DEF tank is at least half full of DEF before performing the resistance measurement. 17), which would indicate that the heater has been exposed to DEF. To determine if there is a short to ground, measure resistance at the Emission Reductant Fluid Supply Pump Module (Fig. 16) The reductant control module is mounted outside the tank. Within the Emission Reduction Fluid Tank is the Emission Reductant Fluid Supply Pump Module, which contains an electrically operating reductant pump reductant level, quality, and temperature sensors and reductant system heaters. The faulty Emission Reduction Fluid Tank heater may be caused by the tank heating elements being exposed to Diesel Exhaust Fluid (DEF) and shorting to the pump ground.
![2011 chevrolet duramax service def system reset 2011 chevrolet duramax service def system reset](https://davisbuickgmc.files.wordpress.com/2011/02/2500hd.jpg)
DTCs P20BB (Reductant Heater 1 Control Circuit Low Voltage) and P20C3 (Reductant Heater 3 Control Circuit Low Voltage Test Status) also may be set in the Engine Control Module (ECM).
#2011 CHEVROLET DURAMAX SERVICE DEF SYSTEM RESET DRIVER#
If the Emission Reduction Fluid Tank heater is not operating properly, there may be a Service Emission System/Service Exhaust Fluid System message on the Driver Information Center along with an illuminated Check Engine MIL. The Emission Reduction Fluid Tank heater may be faulty on some 2020 Silverado 1500, Silverado 2500HD/3500HD, Sierra 1500, Sierra 2500HD/3500HD 2021 Tahoe, Suburban, Yukon and Escalade models equipped with the 6.6L Duramax diesel engine (RPO L5P) or 3.0L Duramax diesel engine (RPO LM2).