Engine-Codes.com
Engine-Codes – Chevrolet – P0046 2018 Chevrolet Silverado

P0046 2018 Chevrolet Silverado Code - Turbocharger Boost Control Position Performance

Quick Answer

The P0046 code on a 2018 Chevrolet Silverado indicates a problem with the turbocharger boost control position performance. Common causes include Faulty boost control position sensor, Damaged wiring or connectors, Stuck or malfunctioning turbocharger wastegate. 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
P0046 2018 Chevrolet Silverado indicates Turbocharger Boost Control Position Performance.
Common causes
Common causes include Faulty boost control position sensor, Damaged wiring or connectors, Stuck or malfunctioning turbocharger wastegate.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0046 2018 Chevrolet Silverado Description

The P0046 code on a 2018 Chevrolet Silverado indicates a problem with the turbocharger boost control position performance. The turbocharger in a vehicle is responsible for increasing the engine's power output by forcing more air into the combustion chamber. The boost control position sensor monitors the position of the turbocharger's vanes to ensure optimal performance. When this sensor detects that the turbocharger is not providing the expected boost pressure, it triggers the P0046 code.

OBDII Code P0046 2018 Chevrolet Silverado - Turbocharger Boost Control Position Performance
P0046 2018 Chevrolet Silverado Code - Turbocharger Boost Control Position Performance

Common Causes of P0046 2018 Chevrolet Silverado

  1. Faulty boost control position sensor
  2. Damaged wiring or connectors
  3. Stuck or malfunctioning turbocharger wastegate
  4. Turbocharger issues
  5. Electronic control module (ECM) malfunction

Symptoms of P0046 2018 Chevrolet Silverado

  1. Decreased engine power
  2. Poor acceleration
  3. Reduced fuel efficiency
  4. Illuminated check engine light
  5. Engine misfires or hesitation

How to Fix P0046 2018 Chevrolet Silverado

  1. Diagnose the specific cause of the P0046 code using a scan tool to pinpoint the issue.
  2. Inspect the boost control position sensor, wiring, and connectors for any damage or corrosion.
  3. Test the turbocharger wastegate for proper operation and clearance.
  4. Check the turbocharger for any signs of damage or malfunction.
  5. Replace any faulty components, such as the boost control position sensor or turbocharger, and reset the code to ensure proper functionality.

Cost to Fix P0046 2018 Chevrolet Silverado

The typical repair costs for addressing a P0046 code on a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue. On average, the parts required for this repair can range from $100 to $500, while the labor costs can range from $150 to $300. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate estimate.

Need more information about the P0046 2018 Chevrolet Silverado code?

Need more information on how to fix the P0046 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0046 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0046 2018 Chevrolet Silverado Code

1. What does the OBDII code P0046 on a 2018 Chevrolet Silverado indicate?

- The code P0046 indicates a Turbocharger Boost Control Position Performance issue in the vehicle.

2. What are some common symptoms of OBDII code P0046 in a 2018 Chevrolet Silverado?

- Common symptoms include reduced engine power, poor acceleration, and possible turbocharger issues.

3. What are the possible causes of OBDII code P0046 in a 2018 Chevrolet Silverado?

- The code P0046 can be triggered by a faulty turbocharger wastegate, damaged wiring or connectors, or a malfunctioning boost control position sensor.

4. How can I diagnose the cause of OBDII code P0046 in my 2018 Chevrolet Silverado?

- Diagnosing the issue may involve checking the wastegate operation, inspecting the wiring and connectors for damage, and testing the boost control position sensor.

5. Can I continue driving my 2018 Chevrolet Silverado with the OBDII code P0046 present?

- It is not recommended to drive the vehicle with the code P0046 as it can lead to further damage and potential safety hazards.

6. What are the repair options for addressing OBDII code P0046 in a 2018 Chevrolet Silverado?

- Repairs may involve replacing the turbocharger wastegate, repairing or replacing damaged wiring, or replacing the boost control position sensor.

7. How much does it typically cost to fix OBDII code P0046 in a 2018 Chevrolet Silverado?

- The cost of repairs for the P0046 code can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars.

8. Can I reset the OBDII code P0046 in my 2018 Chevrolet Silverado using an OBDII scanner?

- Yes, you can reset the code using an OBDII scanner, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

9. Are there any maintenance tips to prevent OBDII code P0046 from appearing in a 2018 Chevrolet Silverado?

- Regularly servicing and maintaining the turbocharger system, checking for any signs of wear or damage, and addressing any issues promptly can help prevent the P0046 code.

10. Is it recommended to seek professional help for diagnosing and repairing OBDII code P0046 in a 2018 Chevrolet Silverado?

- Due to the complexity of turbocharger systems and potential safety risks, it is advisable to consult a qualified mechanic or dealership for accurate diagnosis and repairs of the P0046 code.

Discuss the causes and fixes for P0046 2018 Chevrolet Silverado OBDII Code

Submit a New Comment

  • My brother in law has been fighting this P0046. he took to a dealer that said his battery (8 mos old) was bad and corrosion on a $400 cable assy. (We cleaned the terminals, it comes back again) It comes back intermittently and goes into fail safe, won't accelerate over 30-40mph(a hazard on the freeway!) Dealer doesnt seem to know how to fix it.

    Reply to Comment

    • P0046 on the 2018 Silverado points to the turbo vane position control system, and the fact that it is intermittent and puts the truck into fail-safe makes me think more about the actuator, its wiring, or the connector than the battery itself.

      A weak battery or corroded cable can cause strange electrical faults, but if cleaning the terminals doesn’t change the problem and P0046 keeps returning, I would want the dealer to watch commanded versus actual turbo vane position on a scan tool while the fault occurs. If the actuator is being commanded to move but the position doesn’t follow, the actuator or turbo vane mechanism is sticking. If the signal drops out intermittently, then inspect the actuator harness and connector closely for heat damage, rubbed wires, or poor terminal tension.

      Since the truck is dropping into reduced power on the highway, I would not keep treating this as just a battery issue. The turbo vane actuator circuit needs to be properly diagnosed under the conditions when the fault happens.

      Reply to Comment