Code Definition

P099E — Shift solenoid H circuit low

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

About P099E

P099E 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.

When P099E is stored, the module has detected a signal or supply voltage lower than the expected operating range.

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 P099E 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 P099E fault code is triggered when the vehicle's control module detects a low voltage condition in the circuit of Shift Solenoid H. This code indicates that the voltage in the solenoid's circuit is below the expected threshold. The control module monitors the voltage of the Shift Solenoid H circuit during operation, and a voltage lower than the normal operating range is considered indicative of a circuit malfunction, leading to the setting of this code.

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