Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P026CAbnormal Injection Quantity
Manufacturer communications
13Original wording in English
CHEVROLET, GMC
Service Update. Certain trucks may falsely set fuel injector diagnostic trouble codes P026C and/or P20EE. Dealers will reprogram the engine control module (ECM).
CHEVROLET, GMC
This technical bulletin provides repair information to correct a customer concern of MIL Illuminated- ECM Update for P026C, P20EE, or P11D5.
CHEVROLET, GMC
This Preliminary information communicates to dealer technicians that DTC P026C are under investigation by GM Engineerinig.
MACK
Expired - Mack Chassis - Diagnostic Trouble Code ( DTC ) P026C Lighting The Malfunction Indicator Light ( MIL ) - US14+OBD13, US14+OBD15 And US14+OBD16 - Commonly Model Years 2015 To 2017 (Non-Common Rail Fuel System) Chassis
Check vehicle applicability
50A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Chevrolet | SILVERADO 2500 ↗ | 2021 |
| Chevrolet | SILVERADO 3500 ↗ | 2021 |
| Chevrolet | SILVERADO 4500 ↗ | 2021 |
| GMC | SIERRA 1500 ↗ | 2021 |
| GMC | SIERRA 2500 ↗ | 2021 |
| Hino | CONVENTIONAL TRUCKS W/JO8 ↗ | 2016 |
| Hino | NE8J ↗ | 2014 |
| Hino | NJ8J ↗ | 2014 |
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.