× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
2012 Chevrolet Silverado 2500 HD LT 6.6L MIL Lamp on
Posted to GM Driveability on 9/11/2014 12 Replies

Greetings techs. I'm losing weight over this one because it's eating my lunch. Pickup came in with "Service exhaust fluid system" message on Instrument panel. Scanned for codes and found P20B9 for reservoir heater circuit fault. Tested circuit both at glow plu...

12 Replies Received (View Replies)

  Related Documents & Media  2012 Chevrolet Silverado 2500 HD LT

 
Message Closed w/FIX

car Vehicle Data

2012 Chevrolet Silverado 2500 HD LT

VIN 1GC1KXC8XC
Engine6.6 L / 8 cyl / DIESEL
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection / Diesel
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P20B9DEF Reservoir heater control circuit open or high resistance
Message Closed w/FIX

car Vehicle Data

2012 Chevrolet Silverado 2500 HD LT

VIN 1GC1KXC8XC
Engine6.6 L / 8 cyl / DIESEL
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection / Diesel
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P20B9DEF Reservoir heater control circuit open or high resistance