AutoCodes – Generic – P1905

P1905 Code - Charge Air Coolant Pump Relay Short To Positive

Quick Answer

P1905 indicates Charge Air Coolant Pump Relay Short To Positive. Common causes include Faulty Charge Air Coolant Pump Relay, Charge Air Coolant Pump Relay harness is open or shorted, Charge Air Coolant Pump Relay circuit poor electrical connection. 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: P1905 indicates Charge Air Coolant Pump Relay Short To Positive.
Common causes: Common causes include Faulty Charge Air Coolant Pump Relay, Charge Air Coolant Pump Relay harness is open or shorted, Charge Air Coolant Pump Relay circuit poor electrical connection.
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 8,614

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 Sep 27, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1905 Description

OBDII Code P1905 - Charge Air Coolant Pump Relay Short To Positive - AutoCodes.com — P1905 Code - Charge Air Coolant Pump Relay Short To Positive

What does this mean?

What are the Possible Causes of the DTC P1905?

Faulty Charge Air Coolant Pump Relay
Charge Air Coolant Pump Relay harness is open or shorted
Charge Air Coolant Pump Relay circuit poor electrical connection

How to Fix the DTC P1905?

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 P1905 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.

Need more information about the P1905 code?

Need more information on how to fix the P1905 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1905 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1905 Audi — Charge Air Coolant Pump Relay Short To Positive
P1905 Volkswagen — Charge Air Coolant Pump Relay Short To Positive

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.