What is P20BA Code On 6.7 Powerstroke & How To Fix It?

Getting the code P20BA isn’t anything less than a nightmare. If you’re getting this DTC & don’t know what it means, this article is for you.

In this article, I’ve discussed everything about this error code which includes – symptoms, causing factors & a step-by-step solving guide.

What is P20BA Code On 6.7 Powerstroke

What Does P20BA Code Mean 6.7L Powerstroke?

P20BA code is one of the DTC (Diagnostic Trouble Codes) of the Ford 6.7L engine. By definition, the error code P20BA refers to Reductant Heater A Control Circuit Performance.

This error code means the PCM(Powertrain Control Module) has detected an unusual voltage of the reductant heater marked as the letter “A”. As there are three heaters (A, B & C), you must be knowledgeable enough to spot the A.

The reductant heater A is located in the DEF (Diesel Exhaust Fluid) tank & it heats up via the PCM to prevent exhaust liquid from freezing.

The error code shows up to let the user know there’s something wrong with the DEF tank heater & PCM cannot heat it up due to unusual voltage.

Symptoms Of Getting The P20BA Code On A 6.7

The DTC P20BA comes with several symptoms that are hard to unsee. Suspect to have this code if you’re facing these symptoms mentioned below:

  • CEL (Check Engine Light) is Turned On
  • Sluggish Driving Experience
  • Reduced Engine Power or Reduced MPG (Mileage Per Gallon)
  • Excessive Smoke From Exhaust Panel
  • Other SCR (Selective Catalytic Reduction) Related Codes

The Causing Factors Of The Error Code P20BA

You might fall victim to this error code for several reasons. Sadly, you can’t do anything to prevent these causing factors. Here are some of the causing factors of the error code P20BA:

  • Damaged Reductant Tank Heater A
  • Shorted or Open Reductant Heater Harness
  • Poor Electrical Connection Of Reductant Heater Circuit
  • Failed Or Shorted Diesel Exhaust Fluid Supply Line
  • Damaged Powertrain Control Module (Rare Scenario)

How Serious is Code P20BA On 6.7 Powerstroke?

The error code P20BA is one of the worst DTC you possibly can get from the Ford 6.7L Powerstroke. Ignoring this code may lead to a totally damaged engine shortly.

Don’t worry about the code; I’ve got you covered. Follow the next segment to know both ethical & unethical methods of solving the error code P20BA.

How To Solve P20BA Error Code On 6.7L Powerstroke?

Before proceeding to solve the error code, I would suggest you get these equipment:

  • 5.5 to 15mmm Socket, Extensions & Ratchet
  • Safety Goggles
  • Flashlight
  • Gloves

Now, you can solve the error code in two ways – Replacing the DEF Tank & Deleting the DEF emission system.

Let me be very clear about the deleting part; you should never delete/remove the factory-installed DEF emission system if your state has laws against it.

Replace The Diesel Exhaust Fluid Tank

Even though you’re facing a problem with the heater part, replacing the DEF tank is the only solution. Why? Because you can’t purchase & replace the heater separately.

So without further ado, let’s get started with the step-by-step guide on replacing the DEF Tank:

Step 1: Head over to the driver-side driveshaft & remove the two 13mm bolts of the front part of the skid plate down the center.

Step 2: Now remove the other two 13mm bolts of the back strap of the truck. You’ll find these bolts in the rear of the truck & it’s about two feet ahead of the rear differential, depending on your wheelbase.

Step 3: Later on, remove the five fasteners on the rail side & which is situated on the driver’s side of the skid plate. You’ll have to remove other skid plate supporting bolts as well.

Step 4: Open the fuel door & remove the three 5 ½ mm screws. Then, remove the cap of the DEF pillar neck.

Step 5: Pull the DEF pillar neck down & place the cap back to prevent unwanted accidents due to spills.

Step 6: Detach all the connectors & injector hoses of the DTF tank.

Step 7: Lastly, remove all the 13mm bolts supporting the DTF tank.

Step 8:  Get yourself a new DTF Tank & follow everything as stated earlier to re-install the new DTF tank properly.

Guide Credit: 1A Auto

Delete/Manipulate The DEF Emission System [Danger Alert]

Firstly, check if your state has strict emission control system rules for truck engines such as the 6.7L. I will highly discourage you from doing this deleting task if there’s a law against it.

If your state is okay with modifying the emission control system of vehicles, you can modify the DEF emission system & get rid of the signal light. Get someone to do this task for you, don’t try to do it yourself.

Common Mistakes While Solving The P20BA Code

You may save more than $150 doing the replacement job on your own, but you’ve to be very cautious doing this task.

Try avoiding these common mistakes while solving the error code P20BA & you should be fine:

  • Not Getting Necessary Equipment While Doing The Operation
  • Not Checking State Rules Before Deleting The Emission System

Additional Comments To Consider Regarding The P20BA Code

The P20BA code is one of the most common diagnostic trouble codes of 6.7L. Depending on the situation, you can either replace the DEF tank or delete the entire system.

Most users have reported that this code occurs within their emission control warranty period, which is five years or 50k miles. It will be a $500+(labor cost) case if you get this error code after the emission control warranty period.


I hope this article was helpful enough to know the DTC P20BA thoroughly. Now you can identify & hopefully fix the error code on your own. If you’re insecure about the method, you can take your vehicle to any auto shop & they’ll handle it for $80 to $150 (Depending on hourly labor rate).

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