P2122 Buick Code - Accelerator Pedal Position Sensor 1 Circuit Low Voltage
Quick Answer
The Accelerator Pedal Assembly contains 2 Accelerator Pedal Position (APP) sensors. Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit 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
- P2122 Buick indicates Accelerator Pedal Position Sensor 1 Circuit Low Voltage.
- Common causes
- Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit 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 P2122 Buick Description
Both the APP sensors 1 and 2 signal percentages increase as the pedal is depressed, from approximately 0 percent at rest to above 95 percent when fully depressed.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the APP sensor 1 voltage is less than 0.46 V for less than 1 s.
What are the Possible Causes of the DTC P2122 Buick?
- Faulty Accelerator Pedal Position Sensor
- Accelerator Pedal Position Sensor harness is open or shorted
- Accelerator Pedal Position Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2122 Buick?
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2122 Buick 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.
Need more information about the P2122 Buick code?
Need more information on how to fix the P2122 Buick code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2122 Buick code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2122 Buick Code
What does the OBDII code P2122 mean on a Buick?
P2122 indicates that the accelerator pedal position (APP) sensor 1 is reporting a lower voltage than expected, which may affect throttle performance.
What are the common symptoms of code P2122 on a Buick?
Symptoms include reduced engine power, difficulty accelerating, the throttle not responding properly, and the check engine light being illuminated.
What causes the P2122 code on a Buick?
Common causes include a faulty APP sensor, damaged wiring or connectors, corrosion in electrical connections, or issues with the engine control module (ECM).
Can I drive my Buick with P2122 code active?
Driving with this code may result in limited throttle response and reduced power, making it unsafe in certain situations. It's best to address the issue promptly.
How do I diagnose the P2122 code on a Buick?
Diagnosis typically involves inspecting the wiring and connectors, testing the APP sensor with a multimeter, and checking for ECM issues using a scan tool.
How do I fix code P2122 on a Buick?
Repairs may include replacing the APP sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming the ECM if necessary.
What tools are needed to troubleshoot the P2122 code?
Tools include a basic OBDII scanner, a multimeter for voltage testing, and possibly wiring diagrams specific to your Buick model.
Can a dirty throttle body cause the P2122 code on a Buick?
A dirty throttle body is unlikely to directly cause P2122, but it can contribute to other throttle-related issues. Cleaning it may help overall performance but may not resolve this specific code.
How much does it cost to fix the P2122 code on a Buick?
Costs vary, but replacing the APP sensor typically costs between $100 and $300, including parts and labor. Wiring repairs or ECM issues may increase costs further.
Can a software update fix the P2122 code on a Buick?
In rare cases, a software update for the ECM may resolve the issue if it's caused by programming errors. However, hardware issues are more common with this code.
Discuss the causes and fixes for P2122 Buick OBDII Code
Code P2122 Buick comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
