P1901 Volkswagen Code - Engine Coolant Blower Motor Run-On Relay Short To Positive
Quick Answer
The Engine Control Module (ECM) monitors the Engine Coolant Blower Motor. Common causes include Faulty Engine Coolant Blower Motor Run-On Relay, Engine Coolant Blower Motor Run-On Relay harness is open or shorted, Engine Coolant Blower Motor Run-On 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
- P1901 Volkswagen indicates Engine Coolant Blower Motor Run-On Relay Short To Positive.
- Common causes
- Common causes include Faulty Engine Coolant Blower Motor Run-On Relay, Engine Coolant Blower Motor Run-On Relay harness is open or shorted, Engine Coolant Blower Motor Run-On 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.
Code P1901 Volkswagen Description
What are the Possible Causes of the DTC P1901 Volkswagen?
- Faulty Engine Coolant Blower Motor Run-On Relay
- Engine Coolant Blower Motor Run-On Relay harness is open or shorted
- Engine Coolant Blower Motor Run-On Relay circuit poor electrical connection
How to Fix the DTC P1901 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 P1901 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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Frequently Asked Questions about P1901 Volkswagen Code
1. What does the OBDII code P1901 mean on a Volkswagen?
P1901 indicates an "Engine Coolant Blower Motor Run-On Relay Short To Positive," meaning there is an electrical issue in the blower motor's relay circuit.
2. What are the symptoms of code P1901 on a Volkswagen?
Symptoms may include the blower motor running continuously, the engine cooling fan staying on after the engine is off, or the Check Engine Light illuminating.
3. What causes the P1901 code to appear?
Common causes include a faulty blower motor run-on relay, damaged wiring, a short circuit to positive, or a malfunctioning control module.
4. Can I drive my Volkswagen with a P1901 code?
While the vehicle may still be drivable, ignoring the code can lead to overheating issues or battery drain due to the fan running excessively.
5. How can I diagnose a P1901 code in a Volkswagen?
Start by inspecting the blower motor relay, checking for damaged or shorted wiring, and testing the relay for proper function using a multimeter.
6. How do I fix the P1901 code on my Volkswagen?
Repairs may involve replacing the blower motor run-on relay, repairing damaged wiring, or addressing any short circuits in the circuit.
7. How much does it cost to repair a P1901 code?
Costs vary depending on the issue, but replacing the relay typically costs $50-$150, while wiring repair may add labor costs.
8. Can a weak battery cause the P1901 code?
While unlikely, a weak or failing battery can contribute to electrical issues. Ensure the battery is in good condition when diagnosing the problem.
9. What tools are needed to fix the P1901 code?
You’ll need a multimeter to test electrical continuity, a scan tool to clear the code, and basic tools for replacing the relay or repairing wiring.
10. Will clearing the P1901 code fix the problem?
Clearing the code won’t solve the underlying issue. You must repair the fault in the blower motor relay circuit to prevent the code from returning.
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