P0121 2016 Chevrolet Silverado Code - Throttle Position Sensor 1 Performance
Quick Answer
The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly 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
- P0121 2016 Chevrolet Silverado indicates Throttle Position Sensor 1 Performance.
- Common causes
- Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly 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 P0121 2016 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0121 2016 Chevrolet Silverado?
- Faulty Throttle Body Assembly
- Throttle Body Assembly harness is open or shorted
- Throttle Body Assembly circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0121 2016 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 P0121 2016 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.
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Frequently Asked Questions about P0121 2016 Chevrolet Silverado Code
What does the P0121 code mean on a 2016 Chevrolet Silverado?
The P0121 code indicates a problem with the performance of Throttle Position Sensor (TPS) 1, where its signal is outside the expected range or inconsistent with other sensor inputs.
What are the symptoms of a P0121 code in a Chevrolet Silverado?
Symptoms may include poor acceleration, unstable idle, reduced engine power mode, stalling, and the check engine light turning on.
What causes the P0121 code to appear?
Common causes include a faulty throttle position sensor, wiring or connector issues, a damaged throttle body, or carbon buildup affecting the throttle plate's movement.
Can a dirty throttle body cause the P0121 code?
Yes, carbon buildup on the throttle body can cause the TPS to send incorrect signals, leading to the P0121 code.
How do you diagnose the P0121 code on a 2016 Silverado?
Diagnosis typically involves scanning for codes, checking live TPS data, inspecting wiring and connectors, and testing the throttle body for proper operation.
Can I drive my Silverado with the P0121 code?
Driving with the P0121 code is not recommended, as it can affect throttle response and may lead to reduced engine power or stalling.
How much does it cost to fix the P0121 code?
Repair costs range from $100 to $500, depending on whether the issue involves cleaning the throttle body, replacing the TPS, or fixing wiring problems.
Do I need to replace the throttle body to fix the P0121 code?
Not always. The issue could be resolved by cleaning the throttle body, repairing wiring, or replacing only the TPS if it's faulty.
Will clearing the P0121 code fix the problem?
Clearing the code may turn off the check engine light temporarily, but the underlying issue needs to be addressed to prevent the code from returning.
Can a bad accelerator pedal sensor cause the P0121 code?
While uncommon, a faulty accelerator pedal position sensor could potentially contribute to the code if its signal conflicts with the TPS readings.
Discuss the causes and fixes for P0121 2016 Chevrolet Silverado OBDII Code
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