P2122 Fault Code

Throttle/Pedal Position Sensor/Switch D Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2122 fault code indicates that there is a low voltage signal detected from the Throttle/Pedal Position Sensor/Switch D circuit. This sensor is crucial for determining the amount of throttle opening, which directly affects engine power and efficiency. A malfunction in this circuit can lead to improper throttle response and affect the vehicle's overall performance.

What are the symptoms of the P2122 code?

When the P2122 code is triggered, you may experience:

• Poor engine performance or hesitation during acceleration.
• The Check Engine Light of the dashboard will illuminate.
• Reduced fuel efficiency.
• Difficulty in maintaining a steady speed.
• Potential limp mode activation, which restricts engine power.

What causes the P2122 code?

Several factors can lead to a P2122 fault code, including:

• A faulty throttle position sensor.
• Damaged or corroded wiring in the throttle position sensor circuit.
• Poor electrical connections.
• Issues with the engine control unit (ECU).
• A mechanical issue with the throttle body itself.

How to fix P2122?

To resolve the P2122 fault code, you should:

• Start by inspecting the throttle position sensor and its wiring for any visible damage or corrosion.
• Check all electrical connections for security and continuity.
• Test the throttle position sensor with a multimeter to ensure it operates within the specified voltage range.
• If necessary, replace the faulty throttle position sensor.
• Clear the fault code after repairs and take the vehicle for a test drive to confirm that the issue is resolved.