Code Definition

P0733 — Gear 3 Incorrect ratio

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

About P0733

P0733 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 P0733 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 P0733 fault code is triggered when the Transmission Control Module (TCM) identifies a discrepancy between the actual and expected gear ratios for the third gear in the transmission. This code suggests an issue that impacts the transmission's performance when operating in third gear. The causes can be diverse, including mechanical wear or damage within the transmission itself, issues related to the transmission fluid, or sensor malfunctions. This incorrect gear ratio can manifest as symptoms like difficulty or delay when the transmission is shifting into third gear, noticeable slipping in t...

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