Case Number: S1818000024 REV. B
Release Date:

August 2021

Symptom/Vehicle Issue: Diesel Fuel Injector Cleaning Procedure
Discussion: Some customers may experience a Malfunction Indicator lamp (MIL)
Illumination with one or more of the following Diagnostic Trouble Codes (DTCs)
 P026D – Fuel Injection Quantity Higher Than Expected
 P026C – Fuel Injection Quantity Lower Than Expected
 P020A-00 Cylinder 1 Injection Timing P020D-00 Cylinder 4 Injection Timing P020B-00 Cylinder 2 Injection Timing P020E-00 Cylinder 5 Injection Timing P020C-00 Cylinder 3 Injection Timing P020F-00 Cylinder 6 Injection Timing P01CC-00 Cylinder 1 Injection Timing Performance - Over Advanced P01D2-00 Cylinder 4 Injection Timing Performance - Over Advanced P01CE-00 Cylinder 2 Injection Timing Performance - Over Advanced P01D4-00 Cylinder 5 Injection Timing Performance - Over Advanced P01D0-00 Cylinder 3 Injection Timing Performance - Over Advanced P01D6-00 Cylinder 6 Injection Timing Performance - Over Advanced P01CB-00 Cylinder 1 Injection Timing Performance - Over Retarded P01D1-00 Cylinder 4 Injection Timing Performance - Over Retarded P01CD-00 Cylinder 2 Injection Timing Performance - Over Retarded P01D3-00 Cylinder 5 Injection Timing Performance - Over Retarded P01CF-00 Cylinder 3 Injection Timing Performance - Over Retarded P01D5-00 Cylinder 6 Injection Timing Performance - Over RetardedThis document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online
does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear
to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the
appropriate course of action.

Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no
solution is found
FCA US LLC

Version 4.3 10/29/2020

In addition, a customer may also experience a rough run, poor idle, or misfire
If you receive a vehicle with any of the above conditions, follow normal published
diagnostics for that concern. If you have determined that the root cause of the concern
is due to deposits in the fuel injectors, please perform the repair procedure prior to
replacing any injectors.
NOTE: Contaminated fuel is not typically covered under warranty. Please follow
all published warranty documentation pertaining to repairs due to fuel
contamination.
Repair Procedure:
NOTE: Upon completion of the scan tool initiated cleaning procedure, a scan
tool initiated “Service Regeneration” must be performed followed by 30 minute
key off cycle, and a 15 minute drive cycle
NOTE: The PCM must be at the latest available software to run the Fuel Injector
Cleaning routine.
1.

2.
3.
4.

Ensure that the fuel is free of any contamination. Refer to TechConnect/Service
Library Service Information Section 14 – Fuel System> Fuel Delivery, Diesel>
Standard Procedure> Diesel Fuel System Contamination for all current testing and
cleaning procedures.
Add Mopar Diesel Fuel Injector Cleaning (P/N 68194640AA) to the fuel tank per the
instructions printed on the bottle.
Drive the vehicle a short distance (parking lot) and stop aggressively several times
to agitate the cleaner/fuel mixture in the fuel tank. (Slosh fuel mixture in the tank).
Safely drive the vehicle and perform several hard accelerations to further work the
cleaner into the system.

This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online
does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear
to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the
appropriate course of action.

Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no
solution is found
FCA US LLC

Version 4.3 10/29/2020

5.
6.

Ensure that the vehicle has reached minimum operating temperature of 180°F
(82°C).
Park the vehicle in a safe location to run the cleaning routine.
CAUTION: The scan tool Fuel Injector Cleaning procedure MUST be run to
completion. If it is interrupted, the engine will be fixed at an elevated idle. In
the event that this happens, reinitiate the routine and either select “Start
Injector Cleaning Procedure again or “Return to Base Idle Setpoint” if the
procedure was already near completion.

7.

8.

9.
10.
11.

Using Wi-Tech, navigate to PCM “Misc Functions” tab and initiate the “Fuel Injector
Cleaning” procedure. Be sure to follow all scan tool instructions during the
procedure. Be sure the procedure is fully completed before continuing to the next
step
Using Wi-Tech, navigate to the PCM “Misc Functions tab, and initiate the “Diesel
Particulate Filter Service Regeneration” procedure. Be sure to follow all scan tool
instructions during the procedure.
Cycle the ignition off and let the vehicle sit for 30 minutes.
Turn the ignition on and clear all DTCs.
Drive the vehicle for 15 minutes at highway speeds to verify no other DTCs set.

This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online
does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear
to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the
appropriate course of action.

Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no
solution is found
FCA US LLC

Version 4.3 10/29/2020