Code Definition

P021F — Number 12 Cylinder Injector Timing

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P021F

P021F is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P021F is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P021F fault code is triggered when the engine control module (ECM) detects an issue with the timing of the fuel injector for cylinder number 12. This code is indicative of a problem where the injector's operation timing is not aligning with the ECM's expected parameters. This could be due to the injector firing too early or too late. The cause might be electrical, such as issues with the injector's circuitry, or mechanical, related to the injector's operation or engine timing components.

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