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Code P05D5

Quick reference

P05D5 at a glance

Plain-language meaning
This code means that there's a problem with the car's system that lets you choose different driving modes, like sport or eco. It's not getting enough power to work right.
Urgency
Moderate – While it may not affect immediate drivability, it can impact vehicle performance and should be addressed soon.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
Multimeter, Screwdriver set, OBD-II scanner

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

Laymans terms

This code means that there's a problem with the car's system that lets you choose different driving modes, like sport or eco. It's not getting enough power to work right.

Explanation

The P05D5 code is triggered when the vehicle's computer detects a low voltage condition in the circuit for the driver mode select switch B. This switch is responsible for allowing the driver to select different driving modes.

Technical description

The driver mode select switch B circuit is responsible for sending signals to the vehicle's control module to change driving modes. A low circuit condition indicates insufficient voltage or an open circuit, which can affect the vehicle's ability to switch modes.

Symptoms

• Unable to change driving modes

• Check engine light illuminated

• Reduced vehicle performance

Common Causes

• Faulty driver mode select switch

• Damaged wiring or connectors

• Blown fuse

Glossary

OBD-II: On-Board Diagnostics, a standardized system for self-diagnostics and reporting in vehicles.

Circuit: A complete and closed path around which a circulating electric current can flow.

Diagnosis steps

• Check for any blown fuses related to the driver mode select switch.

• Inspect the wiring and connectors for damage or corrosion.

• Test the driver mode select switch for proper operation.

Repair procedures

• Replace the faulty driver mode select switch.

• Repair or replace damaged wiring or connectors.

• Replace any blown fuses.

Tools required

• Multimeter

• Screwdriver set

• OBD-II scanner

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Silverado

• GMC Sierra

• Cadillac Escalade

Preventive measures

• Regularly inspect electrical connections.

• Avoid exposure to moisture.

• Perform routine maintenance checks.

Error code type

Sensor Issue

User experience recommendations

• Avoid switching driving modes until the issue is resolved.

• Consult a professional mechanic for diagnosis and repair.

Warranty information

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

Historical data

This code has been reported in various models, often related to wiring issues or switch failures.

Urgency level

Moderate – While it may not affect immediate drivability, it can impact vehicle performance and should be addressed soon.

Testing conditions

• Vehicle ignition on

• Attempt to change driving modes

Component location

The driver mode select switch is typically located on the vehicle's dashboard or center console.

FAQs

Q: Can I drive my car with the P05D5 code?
A: Yes, but it's recommended to address the issue soon to ensure all driving modes are available and the vehicle operates optimally.

Q: How do I reset the P05D5 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, the code may reappear.

Optional diagnostic gear

Tools that may help diagnose P05D5

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.

View on Amazon
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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