AutoCodes – Mercedes-Benz – P0782 Mercedes-Benz

P0782 Mercedes-Benz Code - 2-3 Shift Malfunction

Quick Answer

This P0782 code indicates that the 2-3 shift valve in the valve body is locked in the direction of the spring compression. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shifting solenoid valve. 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
P0782 Mercedes-Benz indicates 2-3 Shift Malfunction.
Common causes
Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shifting solenoid valve.
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 2,738
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0782 Mercedes-Benz Description

This P0782 code indicates that the 2-3 shift valve in the valve body is locked in the direction of the spring compression. The Transmission Control Module (TCM) controls the gearshifts by turning the shift solenoid valves "ON/OFF" and switching oil pressure to the valves in the valve body. The TCM calculates the "actual" transmission gear by comparing the signals from the input speed sensor and the output speed sensor.
OBDII Code P0782 Mercedes-Benz - 2-3 Shift Malfunction - AutoCodes.com
P0782 Mercedes-Benz Code - 2-3 Shift Malfunction

What are the Possible Causes of the DTC P0782 Mercedes-Benz?

  • Low transmission fluid level
  • Dirty transmission fluid
  • Faulty shifting solenoid valve
  • Shifting solenoid valve harness is open or shorted
  • Shifting solenoid valve circuit poor electrical connection

How to Fix the DTC P0782 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 P0782 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 P0782 Mercedes-Benz code?

Need more information on how to fix the P0782 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0782 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 P0782 Mercedes-Benz Code

What does OBDII code P0782 mean for a Mercedes-Benz?

Code P0782 indicates a 2-3 shift malfunction in the transmission, meaning the vehicle is having trouble completing the shift between 2nd and 3rd gears.

What are the common symptoms of code P0782 in a Mercedes-Benz?

Symptoms may include harsh or delayed shifting, slipping gears, reduced acceleration, and the transmission staying in one gear.

What causes the P0782 code in a Mercedes-Benz?

Common causes include a faulty shift solenoid, transmission fluid issues (low or dirty fluid), damaged valve body, or internal transmission problems.

Can low transmission fluid cause a P0782 code?

Yes, insufficient or contaminated transmission fluid can lead to improper hydraulic pressure, causing shifting issues like code P0782.

How do you diagnose a P0782 code on a Mercedes-Benz?

Diagnosing involves scanning for trouble codes, inspecting the transmission fluid, testing the shift solenoids, and possibly examining the valve body or internal transmission components.

Can driving with a P0782 code damage the transmission?

Yes, continuing to drive with this code can exacerbate internal damage to the transmission and lead to more costly repairs.

How can you fix a P0782 code on a Mercedes-Benz?

Repairs may include replacing the shift solenoid, flushing or refilling transmission fluid, repairing the valve body, or rebuilding the transmission if internal damage is severe.

How much does it cost to repair a P0782 code?

Costs vary widely depending on the issue; replacing a solenoid may cost $200-$400, while major transmission repairs could exceed $2,000.

Can a faulty shift solenoid directly cause code P0782?

Yes, a malfunctioning shift solenoid can prevent the transmission from properly completing the 2-3 gear shift, triggering the P0782 code.

Is the P0782 code specific to Mercedes-Benz vehicles?

No, while it applies to Mercedes-Benz models, the P0782 code can appear in other vehicles with similar transmission systems.

Discuss the causes and fixes for P0782 Mercedes-Benz OBDII Code

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