P16A2 2018 GMC Sierra Code - Throttle Position Sensor Communication Circuit 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 harness is open or shorted, Throttle Body 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
- P16A2 2018 GMC Sierra indicates Throttle Position Sensor Communication Circuit Performance.
- Common causes
- Common causes include Faulty Throttle Body Assembly, Throttle Body harness is open or shorted, Throttle Body 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 P16A2 2018 GMC Sierra Description
What are the Possible Causes of the DTC P16A2 2018 GMC Sierra?
- Faulty Throttle Body Assembly
- Throttle Body harness is open or shorted
- Throttle Body circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P16A2 2018 GMC Sierra?
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 P16A2 2018 GMC Sierra 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 P16A2 2018 GMC Sierra Code
1. What does the OBDII code P16A2 mean on a 2018 GMC Sierra?
P16A2 indicates a problem in the Throttle Position Sensor (TPS) Communication Circuit, specifically a performance issue with signal transmission.
2. What are the symptoms of code P16A2 in a 2018 GMC Sierra?
Common symptoms include reduced engine performance, poor throttle response, illuminated check engine light, and possible activation of limp mode.
3. What causes the P16A2 code to appear on a GMC Sierra?
Potential causes include a faulty throttle position sensor, damaged wiring or connectors in the TPS circuit, or a malfunctioning engine control module (ECM).
4. Can I drive with the P16A2 code in my GMC Sierra?
It’s not recommended to drive with this code active, as it may lead to reduced performance or unsafe driving conditions due to throttle issues.
5. How do I diagnose the P16A2 code on a 2018 GMC Sierra?
Diagnosis involves inspecting the TPS and its wiring for damage, using a scan tool to check live data from the sensor, and testing the circuit for proper voltage and ground.
6. Can a dirty throttle body cause the P16A2 code?
While a dirty throttle body can cause other performance issues, it is unlikely to directly cause the P16A2 code, which relates to the TPS communication circuit.
7. How do I fix the P16A2 code on my GMC Sierra?
Repairs may include replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, or addressing ECM-related issues if necessary.
8. How much does it cost to fix the P16A2 code on a 2018 GMC Sierra?
Repair costs can vary but typically range from $150 to $400, depending on whether the TPS, wiring, or ECM requires replacement.
9. Can a software update fix the P16A2 code on my GMC Sierra?
In some cases, an ECM software update from a dealership may resolve communication issues related to this code.
10. Is the P16A2 code covered under warranty for a 2018 GMC Sierra?
This depends on your vehicle's warranty status. Powertrain or emissions-related warranties might cover the repair, so check with your dealer.
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