P1905 Code - Charge Air Coolant Pump Relay Short To Positive
Quick Answer
The diagnostic trouble code P1905 indicates that there is a short circuit between the charge air coolant pump relay and the positive side of the vehicle's electrical system. Common causes include Faulty charge air coolant pump relay, Short circuit in the wiring harness connected to the relay, Corrosion or damage to the relay or its connectors. 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, Short circuit in the wiring harness connected to the relay, Corrosion or damage to the relay or its connectors.
- 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 P1905 Description
The diagnostic trouble code P1905 indicates that there is a short circuit between the charge air coolant pump relay and the positive side of the vehicle's electrical system. The charge air coolant pump is responsible for cooling the air that has been compressed by the turbocharger before it enters the engine. When the relay for this pump is shorted to positive, it can lead to a variety of issues that can affect the vehicle's performance.
Common Causes of P1905
- Faulty charge air coolant pump relay
- Short circuit in the wiring harness connected to the relay
- Corrosion or damage to the relay or its connectors
- Electrical issues in the vehicle's electrical system
- Incorrect installation or aftermarket modifications affecting the relay
Symptoms of P1905
- Check Engine Light illuminated on the dashboard
- Reduced engine performance or power
- Decreased fuel efficiency
- Engine overheating
- Unusual noises coming from the engine compartment
How to Fix P1905
- Begin by diagnosing the exact cause of the short circuit using a multimeter to test the relay, wiring, and connectors.
- Replace the faulty charge air coolant pump relay with a new, OEM part.
- Inspect the wiring harness for any damage or corrosion, repairing or replacing any affected sections.
- Clear the diagnostic trouble codes from the vehicle's computer using an OBD-II scanner.
- Test the vehicle to ensure that the issue has been resolved and that the charge air coolant pump is functioning properly.
Cost to Fix P1905
The cost of repairing a charge air coolant pump relay short to positive can vary depending on the make and model of the vehicle, the location of the repair, and the specific parts needed. In general, the cost of a new charge air coolant pump relay can range from $50 to $150, with additional costs for labor and diagnostic time. Overall, the total repair cost for this issue could range from $150 to $400 or more. It is recommended to consult with a professional mechanic or auto repair shop to get an accurate estimate based on your specific vehicle and location. Labor rates at auto repair shops typically range from $80 to $150 per hour, but can vary based on various factors.
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Code P1905 Information for Specific Makes
- P1905 Audi — Charge Air Coolant Pump Relay Short To Positive
- P1905 Volkswagen — Charge Air Coolant Pump Relay Short To Positive
Frequently Asked Questions about P1905 Code
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