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Lets have a look at this 2011 Chevy 2500HD with a Duramax Diesel. It was brought to me by the customer after having it at the local dealer for 3 WEEKS and they told him they could not repair it and suggested he buy a new truck?!?! The engine light was on with a code P20B9-00 Reductant Heater Problem. 1, 2 Bar-B-Que lets fix this ol'chivy!
Don't miss part II: https://www.youtube.com/watch?v=WzMoyyw85Q8
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50 thoughts on “Chevy / gmc 2500hd duramax – p20b9-00 reductant heater problem – part i”
  1. Avataaar/Circle Created with python_avatars Donald Coulter says:

    Which code reader are you using in the video? Is it something you'd suggest to buy? How do I get software updates for my 2015 Silverado 2500HD? Thanks

  2. Avataaar/Circle Created with python_avatars Mariah Romero says:

    I replaced my reductive heater circuit I am not throwing any codes but I still have the service exhaust system light won't come off took it to dealer they told me drive it for an hour hour and a 1/2 at 20 miles and 30 miles Per hour I've done it twice nothing's happened do you have any advice

  3. Avataaar/Circle Created with python_avatars JayJay says:

    WTF! The same freaking thing happened to me! 🤬 Dirty bastards!

  4. Avataaar/Circle Created with python_avatars Chris Bentley says:

    If the Dealership can't fix it, send it to Eric O. He'll fix it.😊 I just love the way by deduction you chase these faults down. Nice one Mr O.

  5. Avataaar/Circle Created with python_avatars Antonio Claudio Michael says:

    Very easy 2 wire Circuit just needs a Reductant Heater Nice Diag Eric O @SouthMainAutoRepairLLC

  6. Avataaar/Circle Created with python_avatars Antonio Claudio Michael says:

    Wow the dealership couldn't diagnose a open Circuit 😳 thats very sad Eric O @SouthMainAutoRepairLLC

  7. Avataaar/Circle Created with python_avatars Antonio Claudio Michael says:

    They would rather sell him a newer truck then to fix it because the dealership don't have a Diesel Tech Lmfao that's funny 😂 Eric O more Awesomeness for us Then lol @SouthMainAutoRepairLLC

  8. Avataaar/Circle Created with python_avatars Steve Hart says:

    I had an old 11 Duramax they had to down in Florida they had the tank in a def with the heater went bad in the DF tank I don't know if that'll help you but you might take a look at that if you can

  9. Avataaar/Circle Created with python_avatars Jeremy Olson says:

    Forrest Gump said it best, "both was happening at the same time…"

  10. Avataaar/Circle Created with python_avatars John White says:

    Could you please give me the Exact ALL-TELL MODEL # that you own and that you use to Diag. The drivability issues in your shop. I am a Master lead tech in my shop and the company’s diag. Tools SUCK!
    I will buy it for myself & only be the one using it and was also wondering about the $$ cost?
    Please include ur supplier you purchased it from? YOU DO AWESOME WORK AND AGAIN,
    THANKS FOR YOUR HELP
    . JKW GA……….

  11. Avataaar/Circle Created with python_avatars P My man says:

    Had the same problem but I changed both NOx sensor and good as new
    Just NOx sensor 1 was in backorder so took more than a moth to get but as soon as got both replaced and wohoo good to go

  12. Avataaar/Circle Created with python_avatars Joel Ramirez says:

    Did u get a 0205b code to ?

  13. Avataaar/Circle Created with python_avatars D Freddy says:

    This thing comes as one unit.

  14. Avataaar/Circle Created with python_avatars D Freddy says:

    Hey man how can I test it with a test light without a scanner to start it up? The tank is $294 from autozone

  15. Avataaar/Circle Created with python_avatars Slopoke says:

    I'm dealing with this issue and cannot get the heater test done! It says out of range, after new heater replaced. I have a snap on solus

  16. Avataaar/Circle Created with python_avatars Steven Gullison says:

    Hello, we need more honest mechanics around. Thank you for taking the time to video

  17. Avataaar/Circle Created with python_avatars Nick Skallerud says:

    That Chevy dealer is garbage if the don’t have a diesel tech

  18. Avataaar/Circle Created with python_avatars Mark Zinsmeyer says:

    typical dealer, no diesel guy, let the truck sit there for three weeks to give the customer time to think and wonder around the sales lot. Regardless if the dealer makes more money on service than in sales. . . if sales numbers are down, then the salesmen aren't making any money on commission. . . and the more tricks they are going to try to get you to buy a new one. . . .🤣😜😋😋 and surprisingly, there are a lot of people that are gullible enough to fall for those sales tricks.

  19. Avataaar/Circle Created with python_avatars Cristian Paul says:

    What the model about your scanner? My autel can’t do that 😭 I have the same problem I just replaced the tank I need reset the sensors

  20. Avataaar/Circle Created with python_avatars Cole Hitchcox says:

    What software is that with the service manual?

  21. Avataaar/Circle Created with python_avatars garrett skenes says:

    Delete it

  22. Avataaar/Circle Created with python_avatars Brad Nelson says:

    We had a dealership around were I live do the same thing to us and I bought it to my buddy shop and hey fixed it in 5 minutes

  23. Avataaar/Circle Created with python_avatars José gpe Robles says:

    Mira yo no sé si entiendes español pero tengo un problema serio con una duramax no me funciona el inyector número 8 ya cambié arnés computadora esm el códe es p1244 ya cambié el inyector i sigue el mismo code

  24. Avataaar/Circle Created with python_avatars ImpartialTuber says:

    Never front probe? lol

  25. Avataaar/Circle Created with python_avatars Noel Nunez says:

    Great video

  26. Avataaar/Circle Created with python_avatars joseph espinoza says:

    just viewed this video hard to watch cause i have done about 100 of these DEF tank resiviors don't even diag them anymore well i do command it on and ck. make sure theres a connection. parameter will have some amp reading . and in the special coverage witch is a extended warranty does have instruction . and you should be wearing gloves and eye protection . stuff is corrosive . love your videos . i noticed you started scraching back of your hand lol .

  27. Avataaar/Circle Created with python_avatars Peet Ky says:

    they wanted to sell him a new truck

  28. Avataaar/Circle Created with python_avatars Peet Ky says:

    i think your highlighter smudged the diagram….maybe DG for dark green not OG ..orange

  29. Avataaar/Circle Created with python_avatars Gonzalo Marquez says:

    How the same problem with my 2016

  30. Avataaar/Circle Created with python_avatars Shane Harrison says:

    Truck bounced in and out 7 to 9 times where the truck was purchased they couldnt resolve the issues so I talked to the boss and took it to another dealer who had no troubles handling the job or the work in one shot from then on the ones on the ball got all the purchases and repairs

  31. Avataaar/Circle Created with python_avatars Shane Harrison says:

    Yep seen that a few time even with the f… dealers and their warentee poop too

  32. Avataaar/Circle Created with python_avatars Ozzy Krahn says:

    just wants to sell new the dealer ship wants. just sad.

  33. Avataaar/Circle Created with python_avatars Alexis DeVille says:

    BTW the Duramax is an Isuzu mid duty truck engine used extensively for in Japan!

  34. Avataaar/Circle Created with python_avatars DAVE yATS says:

    i'll always remember you said > people down south working on cars gotta be millionaires cause your like me rust belt Michigan from the damn Salt they dump on our roads grrrrrrrrrr

  35. Avataaar/Circle Created with python_avatars Marlin Young says:

    Those trucks are always in the shop for those dang DEF heaters.

  36. Avataaar/Circle Created with python_avatars tunercars100 says:

    Removed heater assembly after dropping tank, replaced and put tank back in. Took me 2 hours.

  37. Avataaar/Circle Created with python_avatars Donnie Robertson says:

    Second time watching 5/31/2020

  38. Avataaar/Circle Created with python_avatars coltonx3 says:

    Lot of wasted time all you have to do is command the heater on and off and see if it changes heater 1 should go to about 6 volts if not its bad and all you have to do is change the reservoir. Any time you have a heater or level senor code it must be replaced not sure how the dealer dident fix that ya the def reservoir is under sprcial coverage i would have taken it back

  39. Avataaar/Circle Created with python_avatars hafid auto repair says:

    Hello boss I have the same problem, I replace the heater and check engine light goes off but the DEF light keep flashing and gives the message for check reductant fluid system . Do you have a y idea how to take that flashing light off

  40. Avataaar/Circle Created with python_avatars Mr. No Spark Plugz says:

    Delete that bastard!

  41. Avataaar/Circle Created with python_avatars justindasilva73 says:

    As a Gm tech. I’m extremely dumbfounded that they were not able to find the issue. 🤦‍♂️

  42. Avataaar/Circle Created with python_avatars Mikeaaron777 says:

    Our desiel buses with DEF requires refills now and then or it will limp mode the engine.

  43. Avataaar/Circle Created with python_avatars Doc Devin says:

    How many wires does it take to make a butt load?

  44. Avataaar/Circle Created with python_avatars Anthony Rodriguez says:

    Great video thanks for the information

  45. Avataaar/Circle Created with python_avatars Harles5000 Chembetrayals says:

    Typical dealership, "Well we can fix it by selling you a new one!" Their poorly trained technicians with no troubleshooting skills.

  46. Avataaar/Circle Created with python_avatars Automotive Repair Tips and Tricks says:

    great vid thanks bro

  47. Avataaar/Circle Created with python_avatars J B W says:

    Eric, Good Repair. I hate to see you struggle . GM Doc info Doc is 2786547.