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Code P185C

Quick reference

P185C at a glance

Plain-language meaning
This code means that the car's computer thinks the 'Park' gear was engaged when the car was moving, which shouldn't happen.
Urgency
High – This issue can lead to transmission damage or unsafe driving conditions.
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 the 'Park' gear was engaged when the car was moving, which shouldn't happen.

Explanation

The vehicle's transmission control system detected an attempt to engage the 'Park' position while the vehicle was moving at a speed that makes this action implausible.

Technical description

The P185C code is triggered when the transmission control module (TCM) detects an attempt to engage the 'Park' gear while the vehicle is in motion. This could be due to a malfunction in the pressure control solenoid, which is responsible for regulating hydraulic pressure in the transmission.

Symptoms

• Check Engine Light is on

• Unusual transmission behavior

• Inability to shift into 'Park' or other gears

Common Causes

• Faulty pressure control solenoid

• Wiring issues or poor connections

• Defective transmission control module (TCM)

Glossary

Transmission Control Module (TCM): An electronic device that controls the transmission's operation.

Pressure Control Solenoid: A component that regulates hydraulic pressure within the transmission.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the wiring and connections to the pressure control 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 transmission control module (TCM) if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Volkswagen Passat

• Audi A4

• Skoda Superb

Preventive measures

• Regularly maintain the transmission system.

• Ensure proper electrical connections.

• Avoid abrupt gear shifts while driving.

Error code type

Transmission Control Issue

User experience recommendations

• Avoid driving the vehicle until the issue is resolved.

• Consult a professional mechanic for a thorough diagnosis.

Warranty information

Check with the vehicle manufacturer for warranty coverage on transmission components.

Historical data

This code is relatively rare and typically associated with specific vehicle models using certain types of automatic transmissions.

Urgency level

High – This issue can lead to transmission damage or unsafe driving conditions.

Testing conditions

• Vehicle should be stationary.

• Transmission should be in 'Park' or 'Neutral'.

Component location

The pressure control solenoid is located within the transmission assembly.

FAQs

Q: Can I drive with the P185C code?
A: It's not recommended to drive with this code active as it can lead to unsafe conditions or damage the transmission.

Q: How do I clear the P185C code?
A: The code can be cleared using an OBD-II scanner, but it's important to fix the underlying issue first.

Optional diagnostic gear

Tools that may help diagnose P185C

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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