Code Definition

P0954 — ASM Control Circuit Intermittent

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

About P0954

P0954 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 P0954 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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 P0954 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 P0954 fault code is activated when the control module detects intermittent signals in the ASM (Adaptive Shift Control) control circuit. This circuit is crucial in the operation of the automatic transmission, as it manages gear shifts by adapting to the driver's behaviour and the vehicle's operational conditions. An intermittent fault in this circuit suggests sporadic, irregular, or non-continuous signals, which can be due to loose connections, corroded terminals, intermittent shorts in the wiring, or issues within the control elements like shift solenoids or the Transmission Control Module...

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