P2128 2014 Chevrolet Silverado Code - Accelerator Pedal Position Sensor 2 Circuit High 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
- P2128 2014 Chevrolet Silverado indicates Accelerator Pedal Position Sensor 2 Circuit High 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 P2128 2014 Chevrolet Silverado 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 2 voltage is greater than 2.6 V for less than 1 s.
What are the Possible Causes of the DTC P2128 2014 Chevrolet Silverado?
- 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 P2128 2014 Chevrolet Silverado?
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 P2128 2014 Chevrolet Silverado 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 P2128 2014 Chevrolet Silverado code?
Need more information on how to fix the P2128 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2128 2014 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2128 2014 Chevrolet Silverado Code
1. What does the P2128 code mean on a 2014 Chevrolet Silverado?
P2128 indicates a "Accelerator Pedal Position Sensor 2 Circuit High Voltage" issue, meaning the signal voltage from the accelerator pedal position sensor is higher than the expected range.
2. What are the symptoms of a P2128 code in a 2014 Chevy Silverado?
Common symptoms include reduced engine power, the check engine light turning on, unresponsive throttle, or the vehicle entering "limp mode."
3. What causes the P2128 code in a 2014 Chevrolet Silverado?
Possible causes include a faulty accelerator pedal position sensor, damaged wiring or connectors, corroded terminals, or a malfunctioning engine control module (ECM).
4. Can I drive my 2014 Chevrolet Silverado with a P2128 code?
It’s not recommended, as the vehicle may have reduced power or throttle response, which can create unsafe driving conditions.
5. How do I diagnose a P2128 code on a 2014 Chevy Silverado?
Start by inspecting the wiring and connectors around the accelerator pedal sensor for damage or corrosion. Use a multimeter to test the sensor’s voltage and compare it to manufacturer specifications.
6. How do I fix the P2128 code on my 2014 Chevrolet Silverado?
Repairs may include replacing the accelerator pedal position sensor, repairing or replacing damaged wiring, cleaning corroded connections, or, in rare cases, reprogramming or replacing the ECM.
7. How much does it cost to fix a P2128 code in a 2014 Chevrolet Silverado?
Replacing the accelerator pedal position sensor typically costs $100 to $300, including parts and labor. Wiring repairs or ECM replacement may cost more.
8. Can a dirty throttle body cause the P2128 code in my 2014 Chevy Silverado?
While a dirty throttle body can cause throttle-related issues, it is not a direct cause of the P2128 code, which specifically relates to the accelerator pedal position sensor circuit.
9. What tools are needed to troubleshoot a P2128 code on a 2014 Chevrolet Silverado?
You’ll need an OBDII scanner, multimeter, wiring diagram, and basic hand tools to inspect and test the accelerator pedal position sensor and its circuit.
10. Will clearing the P2128 code with a scanner fix the issue on a 2014 Chevrolet Silverado?
Clearing the code may turn off the check engine light temporarily, but the issue will likely return unless the underlying problem is resolved.
Discuss the causes and fixes for P2128 2014 Chevrolet Silverado OBDII Code
Code P2128 2014 Chevrolet Silverado 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.
