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P1473 Audi Code - EVAP Control System LDP Open Circuit

Quick Answer

The P1473 Audi code refers to a problem within the EVAP (Evaporative Emission Control System) Control System, specifically an open circuit in the LDP (Leak Detection Pump). Common causes include Faulty Wiring: The most common cause of an open circuit in the LDP is faulty wiring or a loose connection, Corrosion: Corrosion of the electrical connections can also lead to an open circuit in the LDP, Damaged LDP: A damaged or malfunctioning LDP can trigger this code. 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
P1473 Audi indicates EVAP Control System LDP Open Circuit.
Common causes
Common causes include Faulty Wiring: The most common cause of an open circuit in the LDP is faulty wiring or a loose connection, Corrosion: Corrosion of the electrical connections can also lead to an open circuit in the LDP, Damaged LDP: A damaged or malfunctioning LDP can trigger this code.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1473 Audi Description

The P1473 Audi code refers to a problem within the EVAP (Evaporative Emission Control System) Control System, specifically an open circuit in the LDP (Leak Detection Pump). The EVAP system is designed to prevent fuel vapors from escaping into the atmosphere, reducing pollution and improving fuel efficiency. The LDP is a key component of this system, responsible for checking for leaks in the fuel system.

OBDII Code P1473 Audi - EVAP Control System LDP Open Circuit
P1473 Audi Code - EVAP Control System LDP Open Circuit

Common Causes of P1473 Audi

  1. Faulty Wiring: The most common cause of an open circuit in the LDP is faulty wiring or a loose connection.
  2. Corrosion: Corrosion of the electrical connections can also lead to an open circuit in the LDP.
  3. Damaged LDP: A damaged or malfunctioning LDP can trigger this code.
  4. EVAP System Leak: A leak in the EVAP system can cause the LDP to detect an open circuit.

Symptoms of P1473 Audi

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Decreased Fuel Efficiency: An open circuit in the LDP can cause the EVAP system to malfunction, leading to decreased fuel efficiency.
  3. Strong Fuel Odor: A leak in the EVAP system can result in a strong fuel odor coming from the vehicle.
  4. Failed Emissions Test: If the issue is not addressed, the vehicle may fail emissions tests due to increased emissions.

How to Fix P1473 Audi

  1. Diagnose the Issue: The first step in resolving this problem is to perform a thorough diagnosis to pinpoint the exact cause of the open circuit in the LDP.
  2. Check Wiring: Inspect the wiring and electrical connections associated with the LDP to identify any issues such as loose connections or corrosion.
  3. Replace LDP: If the LDP is found to be faulty, it may need to be replaced with a new unit.
  4. Repair EVAP System: If a leak is detected in the EVAP system, it will need to be repaired to prevent future issues.
  5. Clear Codes: Once the repair is complete, the diagnostic trouble codes should be cleared from the vehicle's computer to reset the check engine light.

Cost to Fix P1473 Audi

The typical repair costs for addressing an EVAP Control System LDP Open Circuit issue can vary depending on the extent of the problem and the specific repairs needed. On average, the cost of replacing the LDP and addressing any associated wiring issues can range from $200 to $500, including parts and labor. However, it's important to note that labor rates at auto repair shops can vary, so it's recommended to check local rates for a more accurate estimate. Additionally, the cost may be higher if additional repairs are needed to fix underlying issues in the EVAP system.

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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 P1473 Audi Code

1. What does the OBDII code P1473 mean on an Audi?

P1473 indicates an issue with the EVAP Control System Leak Detection Pump (LDP), specifically an open circuit, meaning there is an electrical fault in the LDP circuit.

2. What are the symptoms of a P1473 code?

Common symptoms include an illuminated check engine light, possible fuel smell near the vehicle, and failed emissions tests. There may be no noticeable performance issues.

3. What causes the P1473 code in an Audi?

Typical causes include a damaged or disconnected wiring harness, a faulty Leak Detection Pump (LDP), corroded electrical connectors, or a blown fuse in the EVAP system circuit.

4. Can a P1473 code cause drivability issues?

No, this code usually does not directly affect drivability but can lead to increased emissions and may prevent the vehicle from passing emissions tests.

5. How can I diagnose the P1473 trouble code?

Start by inspecting the wiring and connectors for the LDP for damage or corrosion, testing the LDP for proper operation, and checking the corresponding fuse for the circuit.

6. How do I fix a P1473 EVAP Control System LDP Open Circuit code?

Repairs may include replacing damaged wiring, cleaning or replacing corroded connectors, replacing the Leak Detection Pump if faulty, or replacing a blown fuse.

7. How much does it cost to fix a P1473 code on an Audi?

Repair costs vary but typically range from $100 to $500 depending on whether the issue is with wiring, connectors, or the Leak Detection Pump itself.

8. Can I drive my Audi with a P1473 code?

While the car may still be drivable, it is recommended to address the issue promptly to avoid potential emissions problems and to ensure compliance with environmental regulations.

9. What tools are needed to diagnose and repair a P1473 code?

You’ll need an OBDII scanner, a multimeter to test electrical circuits, and possibly basic tools like a socket set for accessing the LDP and wiring.

10. Will clearing the P1473 code fix the problem?

Clearing the code will turn off the check engine light temporarily, but the underlying issue must be resolved to prevent the code from returning.

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