P175D – Volkswagen DSG Mechatronic Fault

Is your Volkswagen’s direct-shift gearbox (DSG) behaving erratically and you’ve found a P175D code stored? This isn’t uncommon and it’s often caused by a malfunction within the mechatronic control unit. Thankfully, we can help you with this.

Shop Now – VW Tiguan P175D Solution

This code frequently stems from mechatronic unit degradation in two popular boxes; the DQ500 and the DQ381. When failure strikes, it’ll create a host of serious drivability issues, like slipping out of gear, a loss of certain gears and a complete loss of drive.

If you’ve got P175D stored in a VW, or you’re experiencing another symptom that suggests there’s a serious issue with your DSG mechatronic, we’ll take a look at it and let you know if it’s defective. Simply fill out our test form to get started.

How do I know if my VW has a DQ381 or DQ500?

The bottom line is, if you’re seeing P175D for a DSG-fitted Volkswagen, it doesn’t matter and you can send your mechatronic unit to us regardless.

However, you might already know that these two DSGs cause major issues for a huge range of VAG models. You’ll find DQ500s fitted to 2010-2019 models with 2.0L and 2.5L engines – like some first-generation Tiguan and Transporter T5s. The DQ381 on the other hand, is fitted to more recent models with slightly smaller engines (1.5L and 2.0L) and less torque – expect these units to be causing problems in the second-generation Tiguan, Mk7 Golf and Transporter T6.

Why does DSG mechatronic failure cause P175D to store?

As mentioned, the P175D code typically stems from a fault with your VW’s DSG mechatronic control unit. This is the hydro-electric control module responsible for operating the dual-clutch transmission – find out more about DSG mechatronic units. 

Although highly sophisticated, these units are incredibly fragile and it doesn’t help that they tend to come loaded with internal components that break down and fail after only a couple of years of operation. While internal degradation within the DSG’s mechatronic can cause a huge range of issues, a common sign that this has occurred is the presence of P175D00:

• P175D00 – Clutch 1 Opens Unintentionally 

As implied by your diagnostic tool’s accompanying message, P175D indicates clutch 1 is open when it shouldn’t be.

In other words, the DSG’s TCU has commanded clutch 1 to close by building hydraulic pressure in the mechatronic unit. However, due to an internal malfunction, this process hasn’t been carried out successfully. Therefore, the mismatch between commanded and actual clutch position causes your VW to store P175D.

In addition to this, your vehicle will inevitably experience performance-related issues too. When P175D is present in a DQ500-equipped VW, it’ll typically cause the DSG to slip out of gear or refuse to enter drive at all -  it can be accompanied by a P176E code too. For owners experiencing P175D in a DQ381-fitted Volkswagen, you’ll typically be left with even gears only (2, 4 and 6), a gearbox warning light and a P0810 code. 

How to resolve the P175D DSG fault

Once affected owners have concluded their P175D code is being caused by a defective DSG mechatronic unit, they’ll usually replace it with brand new. However, this is absolutely not the most effective solution – this will cost thousands and won’t resolve your problem for good.

Remember, these control units contain internal components that’re highly susceptible to degradation. So it doesn’t make sense to simply reinstall them to your Volkswagen, only for them to break down and cause the same P175D fault again. Instead, we propose having your DSG mechatronic comprehensively remanufactured.

Our team of expert technicians will analyse your DSG mechatronic on state-of-the-art testing rigs to pinpoint the cause of P175D at its root. Our cutting-edge equipment allows us to test under realistic conditions and uncover even intermittent failures.

Once the fault has been verified, we’ll get to work rectifying it. Your mechatronic unit will be remanufactured using higher-than-OEM-standard components so that functionality is restored for the long-term. We’ll even cover you with an unlimited-mileage lifetime warranty too so that P175D in your Volkswagen is the last of your worries.

If this wasn’t enough, our process costs much less than a brand-new replacement, it takes just 2-3 working days and you won’t need to recode the unit when you receive it back.

Resolve your VW’s P175D code the right way, have your DSG mechatronic remanufactured by the experts – get started by filling out our short test form.

DQ500

Common failure symptoms:    

• Loss of drive
• Slipping out of gear
• Engine warning light on
• Rough gear changes
• Transmission warning light on

Common fault codes (in addition to P175D): 

• P176E – Clutch 2 Opens Unintentionally
• P184A – Main Pressure Adaptation, Offset Upper Limit Exceeded
• P0810 – Clutch Position Control Error  
• P1898 – Clutch Function Restriction 

DQ381

Common failure symptoms:

• Loss of odd gears
• Transmission warning light on
• Rough gear changes
• Gearbox emergency mode message
• Limp mode

Common fault codes (in addition to P175D): 

• P0810 – Clutch Position Control Error
• P1735 – Position Sensor For Clutch 1 Electrical Malfunction
• P176E – Clutch 2 Opens Unintentionally
• P072C – Stuck In Gear 1
• P176C- Gear Actuator 3 Cannot Be Regulated 

Removal/refitting guide:

Test and rebuild:
All DSG mechatronic units are tested on bespoke hardware-in-the-loop rigs, allowing us to examine your control module under realistic operating conditions. Once the fault has been pinpointed, we’ll rebuild your unit with top-grade components and the very latest remanufacturing equipment. 
 
Programming:
You won’t need to have your rebuilt unit coded back to your vehicle, as this information is preserved throughout our process – simply plug and play when you receive it back from us via a next-day-delivery courier. 
 
Quality:
We take the standard of our work seriously, which is why we have strict quality assurance practices in place. This has helped us to achieve an industry-leading defect rate of just 0.49%, which we’re actively trying to improve further. 

Warranty:

Lifetime unlimited mileage*

How do I get my unit rebuilt?

To pay for the rebuild click the Shop Now link above, select your part number and click: Get yours rebuilt.

Print the payment/booking confirmation email.

Package the DSG mechatronic inside a sturdy box with plenty of packaging material and make sure you include your confirmation email in the box.

Send us your package by tracked courier (the shipping instructions are on the confirmation email).

Once received we will test, rebuild and return your control unit with an unlimited mileage lifetime warranty. If your unit turns out not to be faulty then we will refund your payment less a small testing fee and return shipping.

What if I don’t want to pay up front?

This is not a problem, if you prefer this option then follow these steps:

Fill in and submit this test form.

Print the booking confirmation email.

Package the control unit inside a sturdy box with plenty of packaging material and make sure you include your confirmation email in the box.

Send us your package by tracked courier (the shipping instructions are on the confirmation email).

Once received, we will test your DSG mechatronic and call to inform you of the outcome of testing. If your unit is faulty and you choose to go ahead with the rebuild, then we will take payment over the phone using a debit/credit card.

We will then rebuild your unit and return it to you with an unlimited mileage warranty.

If you require further information regarding this P175D VW DSG fault then please contact us.