P22Fe Code 2018 Duramax (2024)

FAQs

What is the code P22FE on a 2018 Duramax? ›

The DCU sets diagnosis code No. P22FE when the oxygen density detected by the No. 2 exhaust muffler NOx sensor during acceleration is outside the specified range.

What Does the P20EE Code Mean? Diagnostic trouble code (DTC) P20EE stands for “SCR NOx Catalyst Efficiency Below Threshold.” This code is logged when the powertrain control module (PCM) detects that catalyst efficiency is below the threshold on bank 1.

Nitrogen Oxide (NOx) Sensor Issue: This is the most common cause of the P22FB code in Duramax engines.

"2" in the third character position in a DTC indicates that the fuel and air metering and auxiliary emission controls is experiencing a malfunction. The last two characters "FA" is DTC number. OBD2 Diagnostic Trouble Code P22FA means that NOx Sensor Performance has been detected.

A High-Failure Part That's Required for Emissions Regulations. NOx sensors monitor the level of nitrogen oxide emitted by a diesel vehicle to ensure compliance with emissions regulations.

The P207F code is defined as “Reductant Quality Performance.” It's triggered when the PCM detects that the reductant catalyst system isn't functioning properly.

Can I Still Drive with a P20EE Code? Many people do drive with a P20EE code active, but it's not a good idea to do it for very long.

What Does the P204F Code Mean? Diagnostic trouble code P204F stands for “Reductant System Performance Bank 1.” The code is triggered once the powertrain control module (PCM) detects an issue in the reductant part of the SCR system. Bank 1 refers to the bank of the engine where cylinder #1 is located.

The Diesel Intake Air Flow Position Sensor (DIAFPS) is typically located on the throttle body attached to the intake manifold or in a tube within the intake air stream. This sensor converts the incoming airflow volume into an electrical signal for the Powertrain Control Module (PCM).

The codes pop up on a Duramax when there's low fuel rail pressure: P0087 or P1093. Usually, the truck is performing at its maximum and unable to keep up with what's commanded. The common rail fuel system operates at 28 - 29,000 psi and needs to drop only 2,200 psi to trigger the trouble code.

What is code P0100 on Duramax? ›

P0100 Code means that the powertrain control module (PCM) perceives a problem with the Mass Air Flow (MAF) sensor or circuit. The MAF sensor is located in the intake air duct. It is tucked between the air filter and the engine intake manifold that measures the density and volume of the air intake.

The engine computer (PCM) uses multiple NOx sensors to confirm the performance of the reductant system. If one of the NOx sensors fails to operate properly, code P2203 will be set.

The first character indicates the system or area of the vehicle where the problem is located. For example, “P” stands for powertrain, “C” for chassis, “B” for body, and “U” for network communication. The second character, usually a “0” or “1,” signifies whether the issue is generic (0) or manufacturer-specific (1).

Usually that code is for a bad or dirty EGR valve and can also be caused by dirty intake manifold. That's usually with higher mileage vehicles.

What Does the P0400 Code Mean? Diagnostic trouble code (DTC) P0400 code stands for “Exhaust Gas Recirculation (EGR) Flow Malfunction.” It is triggered when the flow of exhaust gas recirculation is lower than what the powertrain control module (PCM) expects.

What Does the P0203 Code Mean? Diagnostic trouble code (DTC) P0203 stands for “Injector Circuit/Open – Cylinder 3.” The powertrain control module (PCM) may set this code if it has detected a potential error in the injector or the injector wiring.

Diagnostic trouble code (DTC) P2202 stands for “NOx Sensor Circuit Low Bank 1.” Diesel engines require high combustion temperatures to effectively burn fuel, which means they tend to emit a large amount of NOx.