S1925000008

STAR ONLINE PUBLICATION
Case Number: S1925000008
Release Date:
5/07/2020
Symptom/Vehicle Issue: Malfunction Indicator Lamp (MIL) Illumination. Diagnostic
Trouble Codes (DTCs) P20E8 – Reductant Pressure Too Low and/or P208B –
Reductant Pump 1 Control Performance Set.
Discussion: Some customers may experience a MIL illumination. Upon further
inspection, you may find DTC P20E8 set in the PCM. This may occur on vehicles with
low mileage or during PDI.
In addition, you may encounter this DTC soon after installing a new Diesel Exhaust
Fluid pump and/or tank.
The cause of this DTC may be due to air pockets trapped in the internal tank filter as
well as external leaks in the DEF system. If you receive a vehicle with this DTC, please
follow the following repair procedure in addition to performing normal diagnostics
Repair Procedure:
1. Prior to clearing the DTCs, obtain a Vehicle Scan Report and save it for your
records.
NOTE: It may be necessary to remove the DEF Tank shield in order to properly
inspect for signs of DEF leaks.
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
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Version 4.2 02/06/2017
STAR ONLINE PUBLICATION
2. Closely inspect the DEF supply line connections at the pump and injector to ensure
there are no leaks. Look for signs of wetness, and/or crystallization around the
connections indicating a leak. Please see (Figure 1, and 2.). Repair any leaks
before proceeding with the rest of this procedure.
3. Clear all DTCs
4. Start and run the vehicle for approx. 30 minutes to allow it to warm up
NOTE: If the DEF system is frozen, it may be best to have the vehicle sit inside
overnight to thaw.
NOTE: The exhaust must reach full operating temperature before the system will
attempt to dose.
5. Drive the vehicle at speeds greater than 30 mph for approximately 30 minutes.
During the drive, attempt several hard turns as well as several aggressive braking
and acceleration events to get the fluid to slosh inside the tank.
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 4.2 02/06/2017
STAR ONLINE PUBLICATION
6. After approximately 30 minutes, observe the messages in the EVIC
7. Did the “Service DEF” message turn off?
YES>>> No further repairs are necessary at this time. Ensure all codes are cleared
and return the vehicle to the customer.
NO>>> Continue to (Step 8)
8. Using Wi-Tech, scan the PCM for DTCs. Did DTC P20E8 return?
Yes>>> Clear DTCs and repeat steps 5-7. If DTC sets resets, further diagnosis is
required.
NO>>> The DTC Monitor did not run. Continue with the drive cycle. Once the
monitor runs, the message will either turn off (if monitor passes) or DTC will reset (if
monitor fails).
9. Did the DTC remain cleared and the “Service DEF” message turn off?
YES>>> No further repairs are necessary at this time. Ensure all codes are cleared
and return the vehicle to the customer.
NO>>> Further diagnosis is required. Please follow all normal published
diagnostics.
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 4.2 02/06/2017