P2132 indicates that the Engine Control Module (ECM) has detected a low voltage condition on the Throttle Position Sensor (TPS) Switch F circuit, meaning the sensor’s signal is weaker than expected.
The TPS or its associated switch circuit can develop an open or high‑resistance condition, pulling the voltage low.
Frayed wires, broken pins, or corrosion at the connector can create resistance or an open circuit on the F line.
A poor ground for the TPS circuit can cause the voltage to drop below the ECM’s threshold.
In rare cases the ECM’s internal driver for the TPS F circuit can fail, but this is far less common than sensor or wiring problems.
Clearing the code may turn off the Check Engine Light temporarily, but the underlying fault will cause the code to return unless the root cause is repaired.
Replacing the ECM is rarely required for this code. Most cases are resolved by repairing the TPS sensor, its wiring, or its ground. Only consider ECM replacement after confirming the sensor and circuit are functional.
A malfunctioning throttle body can affect throttle position readings, but P2132 specifically monitors the voltage level on the TPS Switch F circuit. The throttle body itself is not the primary cause.
Intermittent low‑voltage readings are common when wiring connections loosen with vibration or when the sensor contacts wear. Consistent low voltage usually points to a failed sensor or a shorted wire.