The 2019 Buick Enclave's P0124 code indicates the ECU detected intermittent or erratic signals from the Throttle Position Sensor. Unlike consistent high or low codes, intermittent TPS codes suggest connection problems or sensor issues that come and go.
What P0124 Means
P0124 indicates the TPS signal is dropping out, spiking, or behaving erratically. The sensor may work correctly most of the time but periodically send incorrect data. This intermittent pattern is particularly concerning for throttle control, as sudden signal changes can affect vehicle response.
Enclave Throttle System
The 2019 Enclave's 3.6L V6 uses electronic throttle control with dual TPS sensors for redundancy. The ECU continuously compares these signals—any momentary mismatch or dropout triggers P0124. Even brief glitches in such a safety-critical system are flagged.
Common Causes of Intermittent TPS Signals
Loose or corroded throttle body connectors cause most intermittent TPS issues. The connector may appear secure but have worn terminals or internal corrosion that loses contact under vibration or temperature changes.
A failing TPS potentiometer can develop worn spots or debris on the track that cause momentary signal dropouts. As the throttle moves through certain positions, signal quality varies.
Electromagnetic interference (EMI) can affect TPS signals in rare cases. Poorly routed wiring or aftermarket electronics can introduce noise that causes false intermittent readings.
Diagnostic Strategy
Monitor TPS data continuously while wiggling the throttle body connector and wiring. Any dropouts or spikes during manipulation indicate connection issues. Perform slow throttle sweeps watching for dead spots or sudden voltage changes. These indicate worn sensor tracks.