P2401 – Audi DTC

Audi DTC P2401 – Evap leak detection pump failure, Powertrain Control Module (PCM) failure, Wiring issue

DTC P2401 meaning on Audi

DTC P2401 refers to a diagnostic trouble code that indicates a failure in the Evaporative Emission Control System (EVAP) leak detection pump. This system is responsible for detecting leaks in the fuel vapor system, which is crucial for reducing emissions. When the Powertrain Control Module (PCM) detects an issue with the leak detection pump, it triggers this code, signaling that the pump is not functioning as intended.

Audi DTC P2401 symptoms

Common symptoms associated with DTC P2401 may include:

• Check Engine Light illuminated
• Failed emissions test
• Decreased fuel efficiency
• Unusual fuel odor
• Rough engine idle

Audi DTC P2401 causes

The causes of DTC P2401 can include:

• Evap leak detection pump failure
• Powertrain Control Module (PCM) failure
• Wiring issues, such as damaged or corroded connectors
• Faulty vacuum lines or seals
• Clogged or damaged EVAP canister

Audi DTC P2401 seriousness

DTC P2401 is considered a moderate to serious issue. While it may not cause immediate drivability problems, it can lead to increased emissions and potential failure of emissions tests. Ignoring this code can result in further damage to the EVAP system and may lead to more costly repairs in the future.

How to diagnose DTC P2401 on Audi

To diagnose DTC P2401, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC P2401.
2. Inspect the EVAP leak detection pump for physical damage or signs of wear.
3. Check the wiring and connectors for any signs of corrosion or damage.
4. Test the Powertrain Control Module (PCM) for proper functionality.
5. Perform a smoke test to identify any leaks in the EVAP system.

How to fix DTC P2401 on Audi step-by-step instructions

To fix DTC P2401, follow these steps:

1. Inspect and replace the EVAP leak detection pump if it is found to be faulty.
2. Repair or replace any damaged wiring or connectors associated with the pump.
3. Check and replace any faulty vacuum lines or seals.
4. Clean or replace the EVAP canister if it is clogged or damaged.
5. Clear the DTC using an OBD-II scanner and perform a test drive to ensure the issue is resolved.

How to erase DTC P2401 on Audi

To erase DTC P2401, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to erase the trouble codes.
5. Disconnect the scanner and start the engine to verify that the code does not reappear.

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