P1905 Audi Code - Charge Air Coolant Pump Relay Short To Positive
Quick Answer
The P1905 diagnostic trouble code for Audi indicates that there is a short circuit to positive in the charge air coolant pump relay circuit. Common causes include Damaged wiring or connectors in the charge air coolant pump relay circuit, Faulty charge air coolant pump relay, Electrical short circuit in the circuit. 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 Audi indicates Charge Air Coolant Pump Relay Short To Positive.
- Common causes
- Common causes include Damaged wiring or connectors in the charge air coolant pump relay circuit, Faulty charge air coolant pump relay, Electrical short circuit in the circuit.
- 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 Audi Description
The P1905 diagnostic trouble code for Audi indicates that there is a short circuit to positive in the charge air coolant pump relay circuit. The charge air coolant pump is responsible for circulating coolant to cool the air entering the engine, which helps optimize combustion and overall engine performance. When the relay that controls the charge air coolant pump experiences a short circuit to positive, it can disrupt the proper functioning of the coolant pump, leading to potential overheating and decreased engine efficiency.
Common Causes of P1905 Audi
- Damaged wiring or connectors in the charge air coolant pump relay circuit
- Faulty charge air coolant pump relay
- Electrical short circuit in the circuit
- Malfunctioning engine control module (ECM)
- Corrosion or moisture in the relay circuit
Symptoms of P1905 Audi
- Engine overheating
- Reduced engine performance or power
- Illumination of the check engine light
- Increased fuel consumption
- Rough idling or stalling
How to Fix P1905 Audi
- Begin by conducting a thorough inspection of the charge air coolant pump relay circuit to identify any damaged wiring or connectors.
- Test the charge air coolant pump relay for proper functioning and replace it if necessary.
- Check for any electrical shorts in the circuit and repair or replace affected components.
- Clear the diagnostic trouble codes from the vehicle's ECM and perform a test drive to verify that the issue has been resolved.
- If the problem persists, consider consulting a professional mechanic or dealership for further diagnosis and repair.
Cost to Fix P1905 Audi
The cost of repairing a charge air coolant pump relay short to positive can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost for this issue may fall between $150 and $500. It is important to note that specific diagnosis time and labor rates at auto repair shops can vary, so it's advisable to obtain quotes from multiple sources before proceeding with the repair.
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Frequently Asked Questions about P1905 Audi Code
1. What does the OBDII code P1905 mean on an Audi?
P1905 indicates a problem with the charge air coolant pump relay, specifically a short to positive in the circuit.
2. What are the common symptoms of code P1905 in an Audi?
Symptoms include reduced engine performance, possible overheating of the charge air system, and the illumination of the check engine light.
3. What causes the P1905 code to appear?
This code is usually caused by a short circuit in the charge air coolant pump relay, damaged wiring, or a malfunctioning relay.
4. Can I drive my Audi with a P1905 code?
Driving with a P1905 code is not recommended, as it can lead to reduced performance and potential damage to the engine or turbocharger system.
5. How do I diagnose the P1905 code on my Audi?
Diagnose the issue by inspecting the charge air coolant pump relay, checking for damaged or shorted wiring, and testing the relay for proper operation.
6. How do I fix the P1905 code on my Audi?
Repair or replace any damaged wiring, replace the faulty relay, and clear the code with a diagnostic scanner to ensure the issue is resolved.
7. What tools are needed to troubleshoot the P1905 code?
You’ll need a multimeter to test the relay and wiring, a diagnostic scanner to read and clear codes, and basic tools for accessing the relay and wiring.
8. How much does it cost to fix the P1905 code?
Repairs can range from $50 to $200, depending on whether the issue is wiring-related or requires a new charge air coolant pump relay.
9. Can a faulty charge air coolant pump cause the P1905 code?
While the code specifically relates to the relay, a faulty charge air coolant pump could contribute to the issue and should be inspected.
10. Will replacing the relay always fix the P1905 code?
Not necessarily. If the wiring leading to the relay is damaged or shorted, replacing the relay alone won’t resolve the issue. Always inspect the entire circuit.
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