E286

E286 Engine Model Year 2021B and later PACCAR MX-11 &
MX-13 Fuel Injector Adjustment During First C Service
Number
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E286
Section
​Engine - 45
Subject
​Engine Model Year 2021B and later PACCAR MX-11 & MX-13 Fuel Injector Adjustment During First C Service
Date
3/22/2022
Condition
Engine Model Year (EMY) 2021B and later MX-11 and MX-13 engines need an injector recalibration at the first C
service. (150k miles for line haul or 60K miles for Vocational / Severe Duty / Refuse / Delivery)
Chassis Affected
All Model Year 2022 Model 365, 389, 520, 567, and New Model 579 chassis equipped with Engine Model Year
2021B and later MX-11 & MX-13 engines.
Action
If a customer comes into your dealership and requests this calibration as part of the first C service, follow the
procedures below to recalibrate the fuel injectors.
If the chassis is beyond its first C service interval, this test should be performed at or before the next scheduled
service.
E286 will show as completed in SIR after a claim is processed.
Warranty
Through Standard Warranty or any applicable active Extended Warranty, Peterbilt will pay for applicable labor.
Please refer to the attached glovebox card (Y53-1326-1A1) for specific coverage time limits.
For Dealers using the PRWS Warranty Application, select the Quick Claim from the Recommended Repair
section.
0.4 hours labor to calibrate Injectors using DAVIE4, no engine (PCI-2) software update required. Use
Quick Claim Code E286A.
0.8 hours labor to update engine (PCI-2) software and calibrate Injectors using DAVIE4. Use Quick Claim
Code E286B.
E286B only available if engine (PCI-2) software requires an update as described in Step 4 in the
Procedure Section.
Claim story must include engine (PCI-2) software version before and after update.
Claim code E286B only applies to chassis built prior to 01/10/2022
This bulletin only applies to the injector recalibration task performed during the first C service.
File the claim within 14 days in accordance with the Warranty Policy
PRWS CLAIM CODING
Campaign E286
Code:
Campaign
Type
Non-Campaign
​Claim
Engine Repair Type
Category:
Fix As Fail
Customer 147
Concern
Code
Causal Code
21
Corrective 53
Action
Code
Responsibility Camp
Code:
Failure
Location
044004001
Causal Part
Supplier
Code
N/A
SRT Code
2314737PEX ​
B44-003
0.4 hrs
E286 Injector
Calibration per
Bulletin Procedure
045-969
0.4 hrs
Update PCI-2
software
​
Parts
Software Only – No parts required
Background
An injector calibration check has been added to the first C service (150k miles for line haul or 60K miles for
Vocational / Severe Duty / Refuse / Delivery) for all Engine Model Year 2021B and later MX engines. Mileage and
hour recommendations for C service have not changed. This injector calibration is to ensure the MX engines run at
designed efficiency and power levels.
Procedure
Please follow your dealership's safety procedures and precautions to ensure the vehicle can be
safely repaired and maintained.
Refer to E282 for identification of EMY2021B engines. EMY2021A engines do not require this procedure.
NOTE
Before beginning this procedure, complete all other
tasks in the C service (150k miles for line haul or 60K
miles for Vocational / Severe Duty / Refuse / Delivery)
according to RMI and Service Manuals.
This calibration procedure only needs to be
completed at the vehicle’s FIRST C service. (See RMI
“Maintenance Activities” chart, Note 5)
Ensure that your DAVIE4 version is at the latest available version.
1. Start engine to warm up to operating temp. (coolant above 122°F / 50°C)
2. Visually check fuel system for leaks while engine is running.
3. Connect DAVIE4.
4. In DAVIE4, navigate to the Verify the Injector Calibration test under Repair Support.
If the Injector calibration test is not available in DAVIE4, the PCI software needs to be updated to
the latest available version.
Update the engine software if necessary. Ensure DAVIE4 is up-to-date. Refer to bulletin E134 for
information about programming a PACCAR MX engine.
5. Run the Verify the Injector Calibration test.
6. Engine must be running (idle) and at operating temperatures. (coolant over 122°F/50°C)
7. Engine will run up to 1200RPM until the test completes.
8. DAVIE will show results for each injector.
Service is run successfully, and compensation is applied.
Any other messages in DAVIE4 are listed in RMI along with corrective actions.
9. Shut down engine and disconnect DAVIE4.
Links
Y53-1326-1A1 Fuel Injector Maintenance
Authored by: KP