Throttle/Pedal Position Sensor Circuit Intermittent
Code P2124 indicates an intermittent signal from the throttle/pedal position sensor or switch circuit. This sensor monitors the position of the accelerator pedal and sends voltage signals to the engine control module (ECM). An intermittent fault means the signal is erratic or drops out temporarily, often due to a loose connection, damaged wiring, or a failing sensor. This can cause unpredictable throttle response, hesitation, or loss of power.
01. Most Common Causes
- Faulty throttle/pedal position sensor
- Damaged or corroded wiring/connectors
- Loose electrical connection
- ECM software or hardware issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Intermittent hesitation or surging during acceleration
- Reduced engine power or limp mode
- Unresponsive or erratic throttle pedal
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the throttle/pedal position sensor wiring and connectors for damage, corrosion, or looseness.
Step 3: Use a multimeter to test sensor voltage and resistance per manufacturer specs.
Step 4: Check for intermittent signal by wiggling wiring harness while monitoring scan tool data.
Step 5: Replace sensor if faulty; repair wiring if damaged.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended as intermittent throttle response can lead to sudden loss of power or unintended acceleration, posing a safety risk.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, but costs vary by vehicle and shop rates.