What is the P20EE faultcode? SCR NOx Catalyst Efficiency below Threshold What’s the description of Bank 1 Failure? How can you fix P20EE fault codes? What are the causes and symptoms of the P20EE error code ?….?

What is the P20EE fault code? What does it all mean?

A fault code P20EE can be issued if the powertrain controller module (PCM), detects that bank 1’s catalytic efficiency is lower than the threshold. This code refers to the Selective Catalytic Reduction System (SCR), which is found in diesel engines. The code description of “Bank 1” refers to the downstream catalyst in the engine row that contains the engine’s #1 Cylinder.

Modern diesel engines offer many benefits over petrol engines but they produce more harmful emissions than other engines. Most notably, nitrogen oxide ions (NOx) are the most harmful pollutants. EGR systems can reduce NOx significantly, but most modern diesel engines cannot comply with emission standards. SCR systems have been created to combat this.

SCR systems inject diesel exhaust liquid (also known by Adblue and DEF) into the exhaust pipes in front of the NOx trap. This chemical reaction is carried out using an SCR system. The catalyst’s efficiency is increased by adding DEF to the exhaust gas. The catalyst’s life span is extended by reducing NOx emissions into the atmosphere.

To monitor temperature and efficiency of catalysts, O2 sensors, NOx sensors, and/or temperature sensors are placed in front and behind them. The controller interacts with the PCM to manage the whole system. The controller decides when the DEF is injected based on voltage readings from the sensors. For optimal NOx filtration and exhaust temperature control, it is important to inject the DEF precisely.

If the PCM detects insufficient catalytic efficiency for the minimum allowable parameters of the PCM, a code P20EE will be stored. The check engine light will then illuminate.

Based on the severity of your problem, you may need to set other fault codes. The P20EE code is very similar in appearance to the P20EC and P20ED error codes.

P20EE fault codes can be found on many vehicle models, including those of Dodge, Jaguar BMW, Duramax. GMC Jeep, Volvo.

 

What causes the P20EE fault code?

Here are some reasons to set the P20EE error code:

  • – O2, NOx and exhaust gas temperature sensors that are defective
  • – Defective SCR injector
  • – Deficient, contaminated or defective DEF/Adblue fluid
  • – Defective SCR system
  • – Leakage in the exhaust system prior to the catalyst
  • Circuit problems, such as loose connectors or damaged wires
  • – Failed Diesel Particulate Filter (DPF)
  • – Modification of exhaust system or engine/fuel management system
  • – Defective reductant level sensor (if any)
  • Fluid leakage in the Reductant Injection System
  • – Heating system with defective reductant
  • – The PCM/SCR control module is not working properly or needs to be updated.

 

What are the symptoms for the P20EE Fault Code?

These symptoms may be present if you own a vehicle that has the P20EE code.

  • – Illumination for the check engine light
  • – Exhaust System Warning messages on instrument Cluster
  • – Low engine performance
  • – Increased fuel use
  • – DPF (Diesel Particulate Filter) regeneration may not occur
  • Excessive black Smoke may be caused by the exhaust
  • – The emission system can be set with the SCR or other fault codes.

 

How to Fix the P20EE Fault Code

Before diagnosing P20EE, it is important to address any other fault codes in the SCR or Emissions Control System. Before diagnosing, exhaust leaks must be fixed.

There are several repairs that can be made to fix the P20EE fault code:

  • – Replacing diesel exhaust fluid heater
  • – Replacing your diesel particulate filter
  • – Fixing exhaust system leaks
  • – Fix circuit problems like damaged cables, connectors
  • – Top up or replace DEF fluid
  • – Repairing the defective SCR injector
  • – Replace a defective O2, NOx, or exhaust gas temperature sensor
  • – Reprogramming and replacing the PCM

 

How serious is the P20EE Fault Code

This code can result in the SCR system being disabled. P20EE should always be treated seriously and reacted to as soon as possible. Catalyst damage can occur if the code isn’t fixed immediately.

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