Code Definition

B0701 — Transmission Range Sensor Circuit Malfunction

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

About B0701

B0701 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B0701 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

Because B0701 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 Transmission Range Sensor (also known as the PRNDL switch, neutral safety switch, or park/neutral position switch) provides the controlling module — typically the Body Control Module (BCM), Powertrain Control Module (PCM), or Transmission Control Module (TCM) — with the current position of the gear selector. The sensor uses a series of switched contacts or a multi-tap resistor network so that each gear range produces a unique voltage or digital pattern at the module input. DTC B0701 is set when the receiving module sees an invalid combination, an out-of-range value, an open or short on...

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