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Code P185D

Quick reference

P185D at a glance

Plain-language meaning
This code means that the car's computer thinks something is wrong with a part that helps control the pressure in the transmission when the car is in Park.
Urgency
Moderate – It is advisable to address this issue soon to prevent further transmission damage.
Difficulty
Moderate
System
Transmission Control Issue
Tools mentioned
OBD-II scanner, Multimeter, Basic hand tools

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means that the car's computer thinks something is wrong with a part that helps control the pressure in the transmission when the car is in Park.

Explanation

The P185D code is triggered when the transmission control module (TCM) detects an implausible signal from the pressure control solenoid while the vehicle is in Park position.

Technical description

The pressure control solenoid is responsible for regulating hydraulic pressure in the transmission. When the TCM receives an implausible signal from this solenoid in the Park position, it sets the P185D code. This could be due to electrical issues, mechanical failure, or incorrect sensor readings.

Symptoms

• Transmission may not shift properly

• Check Engine Light is on

• Vehicle may not engage Park properly

Common Causes

• Faulty pressure control solenoid

• Wiring issues or poor electrical connections

• Faulty transmission control module (TCM)

Glossary

Transmission Control Module (TCM): A computer that controls the transmission functions.

Solenoid: An electromechanical device that controls fluid flow in the transmission.

Diagnosis steps

• Use an OBD-II scanner to confirm the code

• Inspect the wiring and connectors to the solenoid

• Test the pressure control solenoid for proper operation

Repair procedures

• Replace the faulty pressure control solenoid

• Repair or replace damaged wiring or connectors

• Reprogram or replace the TCM if necessary

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Volkswagen Jetta

• Audi A4

• Skoda Octavia

Preventive measures

• Regular transmission fluid checks

• Routine maintenance of the transmission system

• Ensure proper electrical connections

Error code type

Transmission Control Issue

User experience recommendations

• Do not ignore the Check Engine Light

• Have the vehicle inspected by a professional

• Avoid driving the vehicle until repaired if shifting issues are severe

Warranty information

Check with your vehicle manufacturer as transmission components may be covered under powertrain warranty.

Historical data

This code is more common in vehicles with higher mileage or those that have not been regularly maintained.

Urgency level

Moderate – It is advisable to address this issue soon to prevent further transmission damage.

Testing conditions

• Vehicle in Park position

• Engine running

Component location

The pressure control solenoid is located inside the transmission, typically accessible by removing the transmission pan.

FAQs

Q: What happens if I ignore this code?
A: Ignoring this code can lead to more severe transmission issues and potentially costly repairs.

Q: Can I drive my car with this code?
A: It's best to avoid driving the car until the issue is diagnosed and repaired, especially if you notice shifting problems.

Optional diagnostic gear

Tools that may help diagnose P185D

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

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Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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