AutoCodes – GMC – P0848 2014 GMC Sierra

P0848 2014 GMC Sierra Code - Transmission Fluid Pressure Switch 2 Circuit High Voltage

Quick Answer

The transmission fluid pressure switch, also known as the pressure switch manifold, is a multiple switch assembly made up of 3 normally open pressure switches and 1 normally closed pressure switch. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly. 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: P0848 2014 GMC Sierra indicates Transmission Fluid Pressure Switch 2 Circuit High Voltage.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly.
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 178

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 Aug 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0848 2014 GMC Sierra Description

The transmission fluid pressure switch, also known as the pressure switch manifold, is a multiple switch assembly made up of 3 normally open pressure switches and 1 normally closed pressure switch. Pressure switch 1 monitors shift valve 1 positioning, pressure switch 2 monitors shift valve 2 positioning, pressure switch 3 monitors shift valve 3 positioning, and pressure switch 4 monitors the position of the manual selector valve. The TCM provides a signal circuit to each of the pressure switches. The TCM constantly monitors the circuits to determine the position of the shift valves. The position of shift valves 1, 2, and 3 is controlled by 3 normally closed shift solenoids. When energized, shift solenoid 1 directs fluid pressure to shift valve 1, shift solenoid 2 directs fluid pressure to shift valve 2, and shift solenoid 3 directs fluid pressure to shift valve 3, which strokes the shift valves. When a shift valve is stroked, an exhaust passage is blocked and fluid pressure increases, closing the normally open pressure switch. The Diagnostic Trouble Code (DTC) will be set when the TCM detects that transmission fluid pressure switch 2 signal circuit is High when shift solenoid 2 is commanded ON for 1 s.

OBDII Code P0848 2014 GMC Sierra - Transmission Fluid Pressure Switch 2 Circuit High Voltage - AutoCodes.com — P0848 2014 GMC Sierra Code - Transmission Fluid Pressure Switch 2 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0848 2014 GMC Sierra?

Low transmission fluid level
Dirty transmission fluid
Faulty Transmission Control Solenoid Valve Assembly
Transmission Control Solenoid Valve Assembly harness is open or shorted
Transmission Control Solenoid Valve Assembly circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P0848 2014 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 P0848 2014 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.

Need more information about the P0848 2014 GMC Sierra code?

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Need Help with the Code?

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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 P0848 2014 GMC Sierra Code

1. What does the OBDII code P0848 mean on a 2014 GMC Sierra?

P0848 indicates a high voltage issue in the Transmission Fluid Pressure Switch 2 Circuit, which monitors hydraulic pressure in the transmission.

2. What are the common symptoms of code P0848 in a 2014 GMC Sierra?

Symptoms may include harsh or delayed shifting, transmission slipping, the transmission being stuck in one gear, or the Check Engine Light turning on.

3. What causes the P0848 code in a 2014 GMC Sierra?

Common causes include a faulty pressure switch, damaged wiring or connectors in the circuit, a short to voltage, or issues with the transmission control module (TCM).

4. Can driving with the P0848 code damage my 2014 GMC Sierra?

Yes, continued driving with this code can cause further transmission damage or reduced performance, so it’s best to address the issue promptly.

5. How do you diagnose the P0848 code on a 2014 GMC Sierra?

Diagnosis involves checking the wiring and connectors in the circuit for damage, testing the pressure switch for proper function, and verifying TCM operation with a scan tool.

6. How can I fix the P0848 code in my 2014 GMC Sierra?

Repairs may include replacing the faulty pressure switch, repairing damaged wiring or connectors, or reprogramming or replacing the TCM if necessary.

7. How much does it cost to repair the P0848 code on a 2014 GMC Sierra?

Repair costs vary but typically range from $150 to $500 depending on whether the issue is with the pressure switch, wiring, or TCM.

8. Can low transmission fluid cause the P0848 code in a 2014 GMC Sierra?

Low transmission fluid is not a direct cause of the P0848 code, but it can contribute to transmission issues that may indirectly trigger the code.

9. How do I reset the P0848 code on my 2014 GMC Sierra?

After repairing the issue, clear the code using an OBDII scanner. If the problem persists, the code will return, indicating further diagnosis is required.

10. Is the P0848 code a common issue for the 2014 GMC Sierra?

While not extremely common, this code can occur due to normal wear and tear or electrical issues in the transmission pressure switch circuit.