AutoCodes – Audi – P0785 Audi

P0785 Audi Code - Shift/Timing Solenoid Malfunction

Quick Answer

The 3-2 Shift Solenoid (SS) valve assembly is a normally-closed, 3-port, on/off device that controls the 3-2 downshift. 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: P0785 Audi indicates Shift/Timing Solenoid 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 3,991

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 Jan 26, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0785 Audi Description

The 3-2 Shift Solenoid (SS) valve assembly is a normally-closed, 3-port, on/off device that controls the 3-2 downshift. The solenoid attaches to the control valve body within the transmission. The solenoid receives ignition voltage through circuit 239. The Powertrain Control Module (PCM) controls the solenoid by providing a ground path. During a 3-2 downshift, the 2-4 band applies as the 3-4 clutch releases. The PCM varies the timing between the 3-4 clutch release and the 2-4 band apply depending on the vehicle speed and the throttle position.
When the PCM detects a continuous open, short to ground or short to power in the 3-2 SS valve assembly circuit, then DTC P0785 sets.

OBDII Code P0785 Audi - Shift/Timing Solenoid Malfunction - AutoCodes.com — P0785 Audi Code - Shift/Timing Solenoid Malfunction

What does this mean?

What are the Possible Causes of the DTC P0785 Audi?

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 P0785 Audi?

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 P0785 Audi 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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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 P0785 Audi Code

1. What does the OBDII code P0785 mean on an Audi?

The P0785 code indicates a malfunction in the shift or timing solenoid, which affects the transmission's ability to shift gears properly.

2. What are the common symptoms of a P0785 code in an Audi?

Symptoms may include erratic or delayed shifting, a noticeable drop in fuel efficiency, the transmission stuck in one gear, and the check engine light turning on.

3. What causes the P0785 code to appear in an Audi?

Common causes include a faulty shift solenoid, low or dirty transmission fluid, damaged wiring or connectors to the solenoid, or a malfunction in the transmission control module (TCM).

4. Can driving with a P0785 code damage my Audi?

Yes, driving with this code can cause further damage to the transmission, leading to costly repairs if not addressed promptly.

5. How can I diagnose the P0785 code in my Audi?

Diagnosis typically involves scanning for additional transmission-related codes, inspecting the shift solenoid and wiring, checking transmission fluid levels and quality, and testing the TCM.

6. How do I fix the P0785 code in an Audi?

Repairs may involve replacing the faulty shift solenoid, cleaning or refilling the transmission fluid, repairing damaged wiring or connectors, or reprogramming/updating the TCM.

7. Is the P0785 code specific to certain Audi models?

No, the P0785 code can occur in various Audi models equipped with automatic transmissions that use shift solenoids.

8. What type of transmission fluid should I use to avoid P0785 issues in my Audi?

Always use the transmission fluid type specified in your Audi owner's manual to ensure proper lubrication and solenoid function.

9. How much does it typically cost to fix a P0785 code in an Audi?

Repair costs can range from $100 to $500 or more, depending on whether the issue involves fluid replacement, solenoid repair, or TCM replacement.

10. Can a faulty battery or alternator cause the P0785 code in an Audi?

While rare, electrical issues such as a weak battery or faulty alternator can affect the transmission's electrical components, potentially triggering the P0785 code.