What is the P20BA fault codes? What is the Reduction Heater “A” Control Circuit Performance failure description? What is the P20BA fault code and how can it be fixed? What are the causes and symptoms of the P20BA ?….fault code?
What is P20BA Fault Coding? What does it all mean?
If the powertrain control module (PCM), detects that the voltage signal coming from the control circuit for the reductant heater “A”, is not within the manufacturer’s specifications, a malfunction code P20BA will be set. Circuit “A”, as described in the code, is valid for vehicles equipped with more than one reducer heater. To determine which circuit “A”, consult the manual.
Selective Catalytic Reduction is a technology designed to reduce NOx residuals in the exhaust and manage diesel engine exhaust better. The system injects a reducing agent or diesel exhaust fluid (DEF/AdBlue) into the exhaust. By injecting Adblue into the exhaust, you can reduce the exhaust temperature. The harmful Nitric Oxides, (NOx), are reduced into water and nitrogen by this reaction and released into the atmosphere in the form of steam.
The entire selective catalytic reduction system is monitored by the PCM, or a designated SCR control module. SCR control module. This module controls the timing of the injection of the diesel exhaust fluid. It does this by checking the data from both the NOx and oxygen sensors.
A heater is used in this system to prevent diesel exhaust fluid crystallization and freezing. The heater is located either in the diesel exhaust fluid filter compartment or the reductant injection feed hose. The PCM will trigger a P20BA code if it detects a voltage signal from the heater control circuit that is not within the normal range.
The P20BA fault code can affect vehicles of all makes and models, including Ford (especially F-250 and F-350), Mercedes Benz and Sprinter, Ford, Mercedes Benz and Sprinter, Audi and Ram, Dodge, Volkswagen and BMW, as well as Mercedes Benz and Sprinter.
What Are the Causes of P20BA’s Fault Code?
Below are some reasons to set fault code P20BA:
- – Defective reduction heater
- – Sensor to detect a defective reducer heater
- – Leakage or damage to wires in the control circuit for the reductant heater
- – Defective SCR control module
- – A PCM that is not working or requires a software upgrade
What are the symptoms for the P20BA fault code?
You may experience the following symptoms if your vehicle has a P20BA fault code:
- – Illumination at the check engine lights
- – Low engine performance
- Regeneration of the diesel particulate filter (DPF), may not occur when the PCM enters a reduced engine power mode
- – Exhaust fumes emitting black smoke
- – Increased fuel consumption
- – Additional codes can be added to the SCR system
How do I fix the fault code P20BA?
- Repair of short and open circuits in the control circuit for the reductant heater
- – Repair of damaged cables or loose connector connections
- – Replacing faulty reduction heater
- – Replace the defective reductant heater sensor
- – Replacement of the faulty reducer injector
- Repair of exhaust system components damaged
How serious is the P20BA Fault Code Code?
P20BA is a very serious code that must be dealt with immediately. This code can disable the SCR. Catalyst damage can occur if the code setting causes are not addressed in time.
