Code Definition

P0735 — Gear 5 Incorrect ratio

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

About P0735

P0735 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 P0735 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 P0735 fault code is set when the Transmission Control Module (TCM) detects a discrepancy between the actual ratio of the fifth gear in the transmission and the expected ratio specified by the manufacturer. This indicates a problem affecting the transmission's functionality in fifth gear. The causes can be varied, ranging from internal mechanical issues within the transmission to complications with the transmission fluid or sensor-related problems. This incorrect gear ratio can lead to symptoms such as difficulty engaging or maintaining fifth gear, noticeable gear slippage, and impaired veh...

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