P0746 Mercedes-Benz Code - Pressure Control Solenoid 'A' Performance Or Stuck Off
Quick Answer
The Pressure Control (PC) Solenoid Valve is an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty line pressure 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
- P0746 Mercedes-Benz indicates Pressure Control Solenoid 'A' Performance Or Stuck Off.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty line pressure 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.
Code P0746 Mercedes-Benz Description
What are the Possible Causes of the DTC P0746 Mercedes-Benz?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty line pressure solenoid valve
- Line pressure solenoid valve harness is open or shorted
- Line pressure solenoid valve circuit poor electrical connection
How to Fix the DTC P0746 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0746 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.
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Frequently Asked Questions about P0746 Mercedes-Benz Code
What does the OBDII code P0746 mean for a Mercedes-Benz?
P0746 indicates that the pressure control solenoid "A" is either underperforming or stuck in the "off" position, affecting the transmission's ability to regulate hydraulic pressure.
What are the common symptoms of code P0746 on a Mercedes-Benz?
Symptoms may include transmission slipping, harsh or delayed shifting, erratic gear changes, and activation of the check engine light.
What causes the P0746 code to appear on a Mercedes-Benz?
Common causes include a faulty pressure control solenoid, low or dirty transmission fluid, internal transmission issues, or wiring problems related to the solenoid.
Can driving with the P0746 code damage my Mercedes-Benz?
Yes, continuing to drive with this code can lead to further transmission damage and reduced vehicle performance.
How do I diagnose the P0746 code on a Mercedes-Benz?
Diagnosis involves checking the transmission fluid condition, inspecting the solenoid and associated wiring, and performing a scan to confirm related transmission issues.
What repairs can fix the P0746 code on a Mercedes-Benz?
Repairs may include replacing the pressure control solenoid, flushing or refilling the transmission fluid, repairing damaged wiring, or addressing internal transmission problems.
How much does it cost to repair a P0746 code on a Mercedes-Benz?
Repair costs vary but can range from $200 to $500 for solenoid replacement, while extensive transmission repairs may cost significantly more.
Can a dirty transmission filter trigger the P0746 code?
Yes, a clogged transmission filter can restrict fluid flow, potentially causing solenoid performance issues and triggering the code.
Is the P0746 code common for Mercedes-Benz vehicles?
While not overly common, this code can occur in Mercedes-Benz vehicles experiencing transmission-related issues, especially with higher mileage.
Should I reset the P0746 code without making repairs?
No, resetting the code without addressing the underlying problem may result in recurring issues and potential damage to the transmission.
Discuss the causes and fixes for P0746 Mercedes-Benz OBDII Code
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