P0124 Code: Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
Note: We do not currently have verified model-specific diagnostic data for the Tesla Model-s. The symptoms and fixes listed below are the standard generic OBD2 guidelines for the P0124 code. Always consult a factory service manual before replacing parts.
What does this mean?
Code P0124 indicates an intermittent electrical fault in the Throttle Position Sensor (TPS) or Accelerator Pedal Position Sensor (APPS) 'A' circuit. This means the signal voltage from sensor 'A' is not stable and is intermittently dropping out, spiking, or showing erratic readings, which the Powertrain Control Module (PCM) interprets as a fault. This can lead to unpredictable engine behavior, such as hesitation, surging, loss of power, or even stalling.
How serious is this code?
An intermittent throttle position sensor can lead to unpredictable engine speed, sudden acceleration or deceleration, loss of power, or even stalling. This poses a significant safety risk, especially when driving in traffic or at highway speeds, as it can compromise vehicle control. It is strongly advised to diagnose and repair this issue promptly.
Diagnostic system: Sensor circuit and live data
On a Tesla Model-s, the P0124 code should be diagnosed as part of the sensor circuit and live data group. Related codes and live data from this same system can change the repair priority, so avoid replacing parts from the code name alone.
Most Common Causes for Tesla Model-s
- Faulty throttle position sensor (TPS)
- Damaged, chafed, or broken wiring harness
- Corroded or loose electrical connector
Symptoms to Watch For
- Check Engine Light is illuminated
- Engine surging or fluctuating RPM
- Hesitation or stumble during acceleration
- Erratic or fluctuating idle speed
Before replacing parts, check these first
- Inspect the connector for corrosion, broken locks, oil intrusion, or heat damage.
- Verify 5V reference, ground, and signal with a multimeter where applicable.
- Compare live sensor data to realistic engine temperature, pressure, airflow, or throttle values.
- Check for blown fuses, weak battery voltage, and damaged connectors before buying major parts.
How to Diagnose
Common Mistakes
Replacing the named sensor without testing power, ground, signal, and wiring continuity first. Always confirm the fault with freeze-frame data, live data, visual inspection, and circuit checks before spending money on parts.
Frequently Asked Questions
Can I drive with the P0124 code?
If the check engine light is solid, you can usually drive to a safe location or mechanic. If the light is flashing, pull over immediately to prevent catastrophic engine or catalytic converter damage.
Will the P0124 code clear itself?
Once the underlying problem is fixed, the engine computer will run its self-checks. If it passes over several drive cycles, the light will turn off automatically. You can also clear it immediately using an OBD2 scanner.
Will this code fail an emissions test?
Yes. If the Check Engine Light is on due to the P0124 code, your Tesla will automatically fail an OBD2 plug-in emissions or smog test.
What should I check first for P0124?
Inspect the connector for corrosion, broken locks, oil intrusion, or heat damage. Verify 5V reference, ground, and signal with a multimeter where applicable. Compare live sensor data to realistic engine temperature, pressure, airflow, or throttle values.
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Repair Estimate
Fuse, connector, wiring, cleaning, or basic inspection
Major component replacement after live data and circuit tests confirm failure
Sensor replacement can be moderate cost, but wiring and connector repairs are common and cheaper.
DIY Difficulty
Can usually be performed at home with basic hand tools.