AutoCodes – GMC – P0048 GMC

P0048 GMC Code - Turbocharger Boost Control Solenoid Control Circuit High Voltage

Quick Answer

The positions of the turbocharger vanes are controlled by the Engine Control Module (ECM). Common causes include Faulty Turbocharger Control Solenoid Valve, Turbocharger Control Solenoid Valve harness is open or shorted, Turbocharger Control Solenoid Valve 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: P0048 GMC indicates Turbocharger Boost Control Solenoid Control Circuit High Voltage.
Common causes: Common causes include Faulty Turbocharger Control Solenoid Valve, Turbocharger Control Solenoid Valve harness is open or shorted, Turbocharger Control Solenoid Valve 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.

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Code Popularity 948

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 20, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0048 GMC Description

The positions of the turbocharger vanes are controlled by the Engine Control Module (ECM). The ECM utilizes a turbocharger vane control solenoid to control the turbocharger vanes and a turbocharger vane position sensor to verify the position of the vane. The ECM will vary the boost depending upon the load requirements of the engine. The vane control solenoid has a high control circuit and a low control circuit. The ECM uses a pulse width modulation on both circuits to control the solenoid. The Diagnostic Trouble Code (DTC) will set if the ECM detects that the commanded state of the driver and the actual state of the control circuits do NOT match or if the condition exists for equal to or greater than 4 seconds.

OBDII Code P0048 GMC - Turbocharger Boost Control Solenoid Control Circuit High Voltage - AutoCodes.com — P0048 GMC Code - Turbocharger Boost Control Solenoid Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0048 GMC?

Faulty Turbocharger Control Solenoid Valve
Turbocharger Control Solenoid Valve harness is open or shorted
Turbocharger Control Solenoid Valve circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0048 GMC?

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 P0048 GMC 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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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 P0048 GMC Code

1. What are common symptoms of OBDII code P0048 GMC?

- Common symptoms include reduced engine power, a noticeable decrease in fuel efficiency, and the illumination of the check engine light.

2. What can cause the Turbocharger Boost Control Solenoid Control Circuit High Voltage code P0048 GMC to trigger?

- The code can be triggered by issues such as a faulty turbocharger boost control solenoid, damaged wiring or connectors in the control circuit, or a problem with the turbocharger itself.

3. How can I diagnose the cause of OBDII code P0048 GMC?

- Diagnosis typically involves using a scan tool to retrieve the trouble code, inspecting the turbocharger boost control solenoid and its connections, and testing the circuit for proper voltage and continuity.

4. What are the potential effects of driving with OBDII code P0048 GMC unresolved?

- Continuing to drive with this code unresolved can lead to further damage to the turbocharger system, reduced engine performance, and potential engine overheating.

5. Can I repair OBDII code P0048 GMC on my own?

- Depending on your automotive repair skills, you may be able to address this code on your own by inspecting and potentially replacing the turbocharger boost control solenoid or repairing any damaged wiring.

6. How much does it typically cost to repair OBDII code P0048 GMC at a mechanic or dealership?

- The cost of repairing this code can vary depending on the root cause of the issue, but it may range from $200 to $500 at a mechanic or dealership.

7. Are there any preventive maintenance tips to avoid triggering OBDII code P0048 GMC?

- Regularly inspecting and maintaining the turbocharger system, including the boost control solenoid and related components, can help prevent issues that may trigger this code.

8. Can a dirty air filter cause OBDII code P0048 GMC to be triggered?

- While a dirty air filter may not directly cause this specific code, it can contribute to overall engine performance issues that may indirectly lead to the code being triggered.

9. How urgent is it to address OBDII code P0048 GMC once it is detected?

- It is recommended to address this code promptly to prevent potential damage to the turbocharger system and ensure optimal engine performance.

10. Is it safe to drive my vehicle to a repair shop with OBDII code P0048 GMC illuminated?

- It is generally safe to drive to a repair shop with this code illuminated, but it is advisable to avoid prolonged driving and address the issue as soon as possible.