P0122 Toyota Code - Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input
Quick Answer
The throttle position sensor is mounted on the throttle with motor body assembly and detects the opening angle of the throttle valve. Common causes include Faulty Throttle Position Sensor (built into Throttle Body Assembly), Throttle Position Sensor circuit is open or shorted, Throttle Position Sensor poor electrical connection. 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 Toyota indicates Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input.
- Common causes
- Common causes include Faulty Throttle Position Sensor (built into Throttle Body Assembly), Throttle Position Sensor circuit is open or shorted, Throttle Position Sensor poor electrical connection.
- 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.
Code P0122 Toyota Description
As the valve closes, the sensor output voltage decreases and as the valve opens, the sensor output voltage increases. The Engine Control Module (ECM) calculates the throttle valve opening angle according to these signals and controls the throttle actuator in response to driver inputs. These signals are also used in calculations such as air-fuel ratio correction, power increase correction, and fuel-cut control.
The ECM uses the throttle position sensor to monitor the throttle valve opening angle. There are several checks that the ECM performs to confirm the proper operation of the throttle position sensor.
This sensor transmits two signals, if the output voltage difference between the two signals deviates from the normal operating range, the ECM interprets this as a malfunction in the throttle position sensor. The ECM illuminates the MIL and stores the Diagnostic Trouble Code (DTC).
What are the Possible Causes of the DTC P0122 Toyota?
- Faulty Throttle Position Sensor (built into Throttle Body Assembly)
- Throttle Position Sensor circuit is open or shorted
- Throttle Position Sensor poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0122 Toyota?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0122 Toyota code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Toyota Models
- P0122 2006 Toyota Camry — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2007 Toyota Camry — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2008 Toyota Camry — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2009 Toyota Camry — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2010 Toyota Camry — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2011 Toyota Camry — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2001 Toyota Corolla — Throttle Position Sensor/Switch 'A' Circuit Low Input 3ZZ-FE Engine
- P0122 2003 Toyota Corolla — Throttle Position Sensor/Switch 'A' Circuit Low Input 3ZZ-FE Engine
- P0122 2004 Toyota Corolla — Throttle Position Sensor/Switch 'A' Circuit Low Input 3ZZ-FE Engine
- P0122 2005 Toyota Corolla — Throttle Position Sensor/Switch 'A' Circuit Low Input 3ZZ-FE Engine
- P0122 2006 Toyota Corolla — Throttle Position Sensor/Switch 'A' Circuit Low Input 3ZZ-FE Engine
- P0122 2001 Toyota Highlander — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2002 Toyota Highlander — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2003 Toyota Highlander — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2004 Toyota Highlander — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2005 Toyota Highlander — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2006 Toyota Highlander — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2007 Toyota Highlander — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2004 Toyota Prius — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2005 Toyota Prius — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2006 Toyota Prius — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2007 Toyota Prius — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2008 Toyota Prius — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2009 Toyota Prius — Throttle Position Sensor/Switch 'A' Circuit Low Input
- P0122 2013 Toyota RAV4 — Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input
- P0122 2014 Toyota RAV4 — Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input
- P0122 2015 Toyota RAV4 — Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input
- P0122 2016 Toyota RAV4 — Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input
- P0122 2017 Toyota RAV4 — Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input
- P0122 2018 Toyota RAV4 — Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input
Frequently Asked Questions about P0122 Toyota Code
1. What are the common symptoms of OBDII code P0122 in a Toyota?
- Common symptoms include rough idling, stalling, reduced engine power, and illuminated Check Engine light.
2. What does the Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input mean in a Toyota?
- It indicates that the Engine Control Module (ECM) has detected a lower than expected voltage from the throttle position sensor or accelerator pedal position sensor.
3. What are the possible causes of the P0122 code in a Toyota?
- The code can be triggered by a faulty throttle position sensor, accelerator pedal position sensor, damaged wiring, poor electrical connections, or a malfunctioning ECM.
4. How can I diagnose the P0122 code in my Toyota?
- Diagnosis involves checking the throttle position sensor and accelerator pedal position sensor for proper operation, inspecting the wiring for damage, and testing the related electrical connections.
5. Can driving with the P0122 code cause further damage to the Toyota?
- Continuing to drive with the P0122 code may lead to poor engine performance, reduced fuel efficiency, and potential damage to other engine components over time.
6. How can I repair the Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input in my Toyota?
- Repair typically involves replacing the faulty throttle position sensor or accelerator pedal position sensor, repairing damaged wiring, and ensuring proper electrical connections.
7. Is it safe to continue driving my Toyota with the P0122 code?
- It is not recommended to drive the vehicle with the P0122 code as it can affect engine performance and potentially lead to safety hazards on the road.
8. Can I reset the P0122 code in my Toyota by disconnecting the battery?
- While disconnecting the battery may clear the code temporarily, it is important to diagnose and repair the underlying issue causing the P0122 code for a permanent solution.
9. How much does it typically cost to repair the Throttle / Pedal Position Sensor / Switch 'A' Circuit Low Input in a Toyota?
- The cost of repairs can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.
10. Will the P0122 code cause my Toyota to fail an emissions test?
- Yes, the P0122 code can prevent your Toyota from passing an emissions test as it indicates a problem with the throttle or pedal position sensors affecting engine performance.
Discuss the causes and fixes for P0122 Toyota OBDII Code
-
i just replaced my toyota camry engine. the engine does not accelerate well. it makes a lot of noise when i try to accelerate. This is one of the codes i got when i scanned d car. other codes are p0010,p0121,p222,p0325,p340
-
Unfortunately there are many thing that get disconnected when replacing an engine. None of the codes you mention should cause a poor engine performance. I suggest double checking the wire connectors.
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