AutoCodes – Mercedes-Benz – P0848 Mercedes-Benz

P0848 Mercedes-Benz Code - Transmission Fluid Pressure Sensor/Switch 'B' Circuit High

Quick Answer

The Transmission Control Module (TCM) monitors the Transmission Fluid Pressure Sensor/Switch signal. Common causes include Faulty Transmission Fluid Pressure Sensor/Switch 'B', Transmission Fluid Pressure Sensor/Switch 'B' harness is open or shorted, Transmission Fluid Pressure Sensor/Switch 'B' 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: P0848 Mercedes-Benz indicates Transmission Fluid Pressure Sensor/Switch 'B' Circuit High.
Common causes: Common causes include Faulty Transmission Fluid Pressure Sensor/Switch 'B', Transmission Fluid Pressure Sensor/Switch 'B' harness is open or shorted, Transmission Fluid Pressure Sensor/Switch 'B' 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 3,218

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on May 10, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0848 Mercedes-Benz Description

The Transmission Control Module (TCM) monitors the Transmission Fluid Pressure Sensor/Switch signal. The TCM sets the OBDII code when the Transmission Fluid Pressure Sensor/Switch is not to factory specifications.

OBDII Code P0848 Mercedes-Benz - Transmission Fluid Pressure Sensor/Switch 'B' Circuit High - AutoCodes.com — P0848 Mercedes-Benz Code - Transmission Fluid Pressure Sensor/Switch 'B' Circuit High

What does this mean?

What are the Possible Causes of the DTC P0848 Mercedes-Benz?

Faulty Transmission Fluid Pressure Sensor/Switch 'B'
Transmission Fluid Pressure Sensor/Switch 'B' harness is open or shorted
Transmission Fluid Pressure Sensor/Switch 'B' circuit poor electrical connection

How to Fix the DTC P0848 Mercedes-Benz?

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 Mercedes-Benz 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 Mercedes-Benz code?

Need more information on how to fix the P0848 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0848 Mercedes-Benz 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 P0848 Mercedes-Benz Code

What does OBDII code P0848 mean for a Mercedes-Benz?

P0848 indicates that the Transmission Fluid Pressure Sensor/Switch 'B' circuit is reading a higher-than-normal voltage, which suggests an issue in the transmission's hydraulic pressure system.

What are the common symptoms of code P0848 in a Mercedes-Benz?

Symptoms may include transmission slipping, harsh or delayed shifting, reduced fuel efficiency, or the transmission entering limp mode.

What causes code P0848 to appear in a Mercedes-Benz?

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

Can low transmission fluid cause code P0848?

Yes, low or contaminated transmission fluid can impact hydraulic pressure and may trigger this code.

How is code P0848 diagnosed on a Mercedes-Benz?

Technicians typically use a scan tool to confirm the code, inspect wiring and connectors for damage, test the pressure sensor, and check the transmission fluid level and condition.

Can driving with code P0848 damage my Mercedes-Benz?

Driving with this code can lead to further damage to the transmission if the issue is not addressed promptly, especially if the transmission fluid pressure is compromised.

How do you fix code P0848 on a Mercedes-Benz?

Repairs may involve replacing the transmission fluid pressure sensor, repairing damaged wiring, replenishing or replacing transmission fluid, or addressing TCM-related issues.

Is code P0848 specific to Mercedes-Benz vehicles?

No, code P0848 can occur on various vehicles equipped with OBDII systems, but the exact diagnosis and repair process may vary by make and model.

Does clearing the P0848 code solve the problem?

Clearing the code will erase it temporarily, but unless the underlying issue is fixed, the code is likely to return.

How much does it cost to repair code P0848 on a Mercedes-Benz?

The repair cost varies depending on the cause, but it may range from $100 for simple wiring repairs to over $1,000 for sensor replacement or transmission repairs.