KC-322
Service Bulletin Details
Public Details for: KC-322
Mack chassis - diagnsotic trouble code P026D-00, fuel injection quantity higher than expected; diagnosis and information - us14+obd15 emissions, model year 2016
- 2016 -
Models from 2016
1/31/22, 10:09 AM
Article
Mack Chassis - Diagnsotic Trouble Code P026D-00,
Fuel Injection Quantity Higher Than Expected;
Diagnosis And Information - US14+OBD15
Emissions, Model Year 2016
Internal Content
P026D / P026D00 indicates the exhaust has too little oxygen detected by
the Nox sensors versus fuel rate. Incorrect or failed boost sensors,
incorrect injectors, or EGR system failures, may all cause this code. If no
fault found at the conclusion of guided diagnostics, ensure the correct
part number boost sensor and injectors are installed. Verify boost
and EGR delta P, are reading zero key on, engine off. Physically verify the
EGR valve is not hanging in travel or bypassing when commanded closed.
If still no fault found, road test the unit briefly and compile a datalog of
engine sensors and check for excessively high boost pressures in the log.
The sensor monitoring template and instructions (entitled "READ FIRST;
TT 2.4 - Steps to Import a Template") can be found here.
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k84061935
p026d-00
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