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.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P026DFuel Injection Quantity Higher Than Expected - US14 OBD15 EmissionsP026DFuel Injection Quantity Higher Than ExpectedP026DFuel Injection Quantity Higher Than ExpectedP026DFuel Injection Quantity Higher Than Expected - US15 Emissions, Model Year ( MY ) 2016Manufacturer communications
14Original wording in English
CHEVROLET, GMC
Reported code forms P026D
This Preliminary information communicates to the dealer technician that DTC P026D is under investigation.
CADILLAC, CHEVROLET, GMC
Reported code forms P026D
This technical bulletin provides a procedure to test the intake manifold for any possible leaks that may cause the customers concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P0172, P026D, P2459, and/or…
JEEP
Reported code forms P026D
"Malfunction Indicator Light (MIL) Due To Possible Faulty O2 Sensor **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic…
CHEVROLET, GMC
Reported code forms P026D
This technical bulletin provides repair information to correct a customer concern of Check Engine Lamp Illuminated with DTC P026D Set, Engine LWN Controller E98 Update.
CADILLAC, CHEVROLET, GMC
Reported code forms P026D
This technical bulletin provides a procedure to test the intake manifold for any possible leaks that may cause the customers concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P0172, P026D, P2459, and/or…
JEEP, RAM
Reported code forms P026D
Perceived Low Power/Acceleration Lag, And/Or Malfunction Indicator Lamp (MIL) Illumination, Diagnostic Trouble Codes (DTCs) P0299 Turbocharger Underboost And/Or P026D ? Fuel Injection Quantity Higher Than Expected, Set.
Check vehicle applicability
144A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Cadillac | ESCALADE | 2024 |
| Cadillac | ESCALADE | 2023 |
| Cadillac | ESCALADE | 2022 |
| Cadillac | ESCALADE ESV | 2023 |
| Cadillac | ESCALADE ESV | 2022 |
| Chevrolet | EQUINOX | 2022 |
| Chevrolet | EXPRESS | 2021 |
| Chevrolet | EXPRESS | 2020 |
| Chevrolet | EXPRESS CUTAWAY VAN | 2022 |
| Chevrolet | EXPRESS CUTAWAY VAN | 2021 |
| Chevrolet | EXPRESS CUTAWAY VAN | 2020 |
| Chevrolet | SILVERADO 1500 | 2024 |
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.
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.