AutoCodes – Volkswagen – P1900 Volkswagen

P1900 Volkswagen Code - Engine Coolant Blower Motor Speed 2 Open Circuit/Short To Ground

Quick Answer

The Engine Control Module (ECM) monitors the Engine Coolant Blower Motor. Common causes include Faulty Engine Coolant Blower Motor, Engine Coolant Blower Motor harness is open or shorted, Engine Coolant Blower Motor 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: P1900 Volkswagen indicates Engine Coolant Blower Motor Speed 2 Open Circuit/Short To Ground.
Common causes: Common causes include Faulty Engine Coolant Blower Motor, Engine Coolant Blower Motor harness is open or shorted, Engine Coolant Blower Motor 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 8,553

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 May 13, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1900 Volkswagen Description

The Engine Control Module (ECM) monitors the Engine Coolant Blower Motor. The ECM sets the OBDII code when the Engine Coolant Blower Motor is not to factory specifications.

OBDII Code P1900 Volkswagen - Engine Coolant Blower Motor Speed 2 Open Circuit/Short To Ground - AutoCodes.com — P1900 Volkswagen Code - Engine Coolant Blower Motor Speed 2 Open Circuit/Short To Ground

What does this mean?

What are the Possible Causes of the DTC P1900 Volkswagen?

Faulty Engine Coolant Blower Motor
Engine Coolant Blower Motor harness is open or shorted
Engine Coolant Blower Motor circuit poor electrical connection

How to Fix the DTC P1900 Volkswagen?

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 P1900 Volkswagen 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.

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Need more information on how to fix the P1900 Volkswagen code? Get Access to Factory Service Manuals

Need Help with the Code?

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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.

Frequently Asked Questions about P1900 Volkswagen Code

1. What does OBDII code P1900 mean on a Volkswagen?

Code P1900 indicates an "Engine Coolant Blower Motor Speed 2 Open Circuit/Short to Ground," meaning there is a problem with the blower motor circuit responsible for cooling the engine.

2. What are the symptoms of P1900 in a Volkswagen?

Common symptoms include the engine overheating, reduced cooling efficiency, the blower motor not functioning at higher speeds, and possibly a lit check engine light.

3. What causes the P1900 code in a Volkswagen?

The main causes include a faulty blower motor, damaged wiring or connectors, a blown fuse, or a malfunctioning blower motor resistor.

4. Can I drive my Volkswagen with a P1900 code?

It’s not recommended, as an inoperative blower motor can lead to engine overheating, which can cause severe damage if not addressed promptly.

5. How do I diagnose a P1900 code on a Volkswagen?

Start by inspecting the blower motor wiring and connectors for damage, test the blower motor itself, check the fuses, and verify the functionality of the blower motor resistor.

6. How do I fix the P1900 code in my Volkswagen?

Repairs may include replacing the blower motor, repairing damaged wiring or connectors, replacing a blown fuse, or replacing the blower motor resistor.

7. Is a faulty blower motor resistor a common cause of P1900?

Yes, a failed blower motor resistor is a common cause, as it regulates the motor's speed and can fail due to wear or overheating.

8. How much does it cost to fix a P1900 code on a Volkswagen?

Costs vary, but replacing a blower motor can range from $150 to $400, while a resistor replacement may cost $50 to $150, excluding labor.

9. Can a short to ground cause the P1900 code?

Yes, a short to ground in the blower motor circuit can trigger this code by disrupting the electrical flow.

10. How can I prevent the P1900 code from reoccurring?

Regular maintenance, including checking electrical connections and ensuring the cooling system components are in good condition, can help prevent this issue.