P0122 Code - Throttle Position Sensor 1 Circuit Low Voltage

Quick Answer

The OBD-II trouble code P0122 indicates a problem with the Throttle Position Sensor (TPS) 1 Circuit having low voltage. Common causes include A faulty Throttle Position Sensor (TPS), Damaged wiring or connectors in the TPS circuit, Corrosion or poor connections in the TPS wiring harness. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means

P0122 indicates Throttle Position Sensor 1 Circuit Low Voltage.

Common causes

Common causes include A faulty Throttle Position Sensor (TPS), Damaged wiring or connectors in the TPS circuit, Corrosion or poor connections in the TPS wiring harness.

Severity

High - diagnose this code as soon as possible.

Can I drive?

Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
• FAQs
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Common Causes of P0122

Symptoms of P0122

How to Fix P0122

Cost to Fix P0122

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Code P0122 Information for Specific Makes

• P0122 Acura — Throttle Position Sensor 'A' Circuit Low Voltage
• P0122 Audi — Throttle Pedal Position Sensor/Switch 'A' Circuit Low
• P0122 BMW — Throttle Position Sensor/Switch 'A' Circuit Low Input
• P0122 Buick — Throttle Position Sensor 1 Circuit Low Voltage
• P0122 Cadillac — Throttle Position Sensor 1 Circuit Low Voltage
• P0122 Chevrolet — Throttle Position Sensor 1 Circuit Low Voltage
• P0122 Chrysler — Throttle Position Sensor/Accelerator Position Pedal Circuit Low Input
• P0122 Dodge — Throttle Position Sensor/Accelerator Position Pedal Circuit Low Input
• P0122 Ford — Throttle/Pedal Position Sensor 'A' Circuit Low Input
• P0122 GMC — Throttle Position Sensor 1 Circuit Low Voltage
• P0122 Honda — Throttle Position Sensor 'A' Circuit Low Voltage
• P0122 Hyundai — Throttle/Pedal Position Sensor 'A' Circuit Low Input
• P0122 Infiniti — Throttle Position Sensor/Switch '1' Circuit Low Input
• P0122 Isuzu — Throttle Position Sensor 1 Circuit Low Voltage
• P0122 Jaguar — Throttle Position Sensor/Switch 'A' Circuit Low Input
• P0122 Jeep — Throttle Position Sensor/Accelerator Position Pedal Circuit Low Input
• P0122 KIA — Throttle/Pedal Position Sensor 'A' Circuit Low Input
• P0122 Lexus — Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input
• P0122 Mazda — Throttle Position Sensor 1 Circuit Low Input
• P0122 Mercedes-Benz — Throttle/Pedal Position Sensor/Switch 'A' Circuit Low Input
• P0122 MINI — Throttle Position Sensor/Switch 'A' Circuit Low Input
• P0122 Mitsubishi — Throttle Position Sensor Circuit Low Input
• P0122 Nissan — Throttle Position Sensor/Switch '1' Circuit Low Input
• P0122 Oldsmobile — Throttle Position Sensor/Switch 'A' Circuit Low Input
• P0122 Pontiac — Throttle Position Sensor 1 Circuit Low Voltage
• P0122 Saturn — Throttle Position Sensor 1 Circuit Low Voltage
• P0122 Scion — Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input
• P0122 Subaru — Throttle Position Sensor/Switch 'A' Circuit Low Input
• P0122 Toyota — Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input
• P0122 Volkswagen — Throttle Pedal Position Sensor/Switch 'A' Circuit Low

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0122 Code

1. What are common symptoms of OBDII code P0122 (Throttle Position Sensor 1 Circuit Low Voltage)?

- Common symptoms include sluggish acceleration, stalling, poor fuel economy, and problems with shifting gears.

2. What are the possible causes of OBDII code P0122?

- The main causes of P0122 are a faulty throttle position sensor, damaged wiring or connectors, or issues with the engine control module.

3. How can I diagnose the cause of OBDII code P0122?

- Diagnose P0122 by checking the throttle position sensor's voltage output, inspecting the sensor's wiring for damage, and testing the sensor's resistance.

4. Can a dirty throttle body cause OBDII code P0122?

- Yes, a dirty throttle body can cause incorrect readings by the throttle position sensor and may trigger code P0122. Regular cleaning can help prevent this issue.

5. What are the recommended repair tips for OBDII code P0122?

- Repair tips include replacing the throttle position sensor if faulty, repairing damaged wiring or connectors, and resetting the engine control module after repairs.

6. Can driving with OBDII code P0122 cause further damage to the vehicle?

- Driving with P0122 can potentially damage other components like the transmission due to erratic throttle response. It is recommended to address the issue promptly.

7. Will disconnecting the battery reset OBDII code P0122?

- Disconnecting the battery may temporarily clear the code, but it is essential to diagnose and address the underlying issue causing P0122 to prevent it from recurring.

8. How much does it typically cost to repair OBDII code P0122 at a mechanic?

- The cost to repair P0122 can vary depending on the labor rates and parts needed. On average, it may cost between $100 to $300 for parts and labor.

9. Is it safe to drive with OBDII code P0122 if the vehicle is still running?

- It is generally not recommended to drive with P0122 as it can lead to performance issues and potential safety hazards. It's best to address the problem as soon as possible.

10. Can OBDII code P0122 be triggered by a loose or disconnected throttle position sensor?

- Yes, a loose or disconnected throttle position sensor can trigger code P0122 due to the lack of proper voltage readings. Ensure the sensor is securely connected during diagnosis.