Code Definition

P0602 — Control Module Programming Error

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

About P0602

P0602 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 P0602 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 P0602 fault code is set when the Engine Control Module (ECM) detects a programming error within the control module. This error usually occurs when there's an issue with the software calibration, reprogramming, or updating process of the ECM. The ECM is the computer that controls various aspects of the vehicle's engine operation, including fuel mixture, ignition timing, and emissions control. A programming error can occur if the ECM software is not correctly installed or updated, or if there's a mismatch between the ECM software and the vehicle's specifications. This can lead to a variety o...

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