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Code P185A

Quick reference

P185A at a glance

Plain-language meaning
This code means that the car's computer is confused about the position of a part that helps control the gears. It's like when you think you're in drive or reverse, but the car isn't sure.
Urgency
Moderate – It is important to address this issue to prevent further transmission damage.
Difficulty
Moderate
System
Transmission Issue
Tools mentioned
OBD-II scanner, Multimeter, Socket set

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

Laymans terms

This code means that the car's computer is confused about the position of a part that helps control the gears. It's like when you think you're in drive or reverse, but the car isn't sure.

Explanation

The code indicates an issue with the pressure control solenoid, which is not matching the expected gear position (Drive or Reverse).

Technical description

P185A is triggered when the transmission control module (TCM) detects an implausible signal from the pressure control solenoid. This solenoid is responsible for regulating hydraulic pressure to engage the correct gear. The mismatch between the actual and desired gear position causes this error.

Symptoms

• Transmission slipping

• Harsh gear shifts

• Check Engine Light is on

Common Causes

• Faulty pressure control solenoid

• Wiring issues or poor connections

• Transmission fluid problems

Glossary

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

TCM: Transmission Control Module, which manages the operation of the transmission.

Diagnosis steps

• Check for other related codes

• Inspect the wiring and connections to the solenoid

• Test the solenoid for proper operation

Repair procedures

• Replace the faulty solenoid

• Repair or replace damaged wiring

• Flush and replace transmission fluid

Tools required

• OBD-II scanner

• Multimeter

• Socket set

Estimated repair cost

$200 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regular transmission fluid checks

• Routine transmission maintenance

• Avoiding harsh driving conditions

Error code type

Transmission Issue

User experience recommendations

• Avoid driving the vehicle if it shifts harshly

• Consult a professional mechanic for diagnosis

Warranty information

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

Historical data

This code has been associated with vehicles that have a history of transmission issues, particularly in models with high mileage.

Urgency level

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

Testing conditions

• Vehicle in Drive or Reverse

• Engine running

Component location

The pressure control solenoid is located within the transmission assembly.

FAQs

Q: Can I drive with a P185A code?
A: It's not recommended to drive with this code as it can lead to further transmission damage.

Q: How do I reset the P185A code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, further diagnosis is needed.

Optional diagnostic gear

Tools that may help diagnose P185A

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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