P1400 – Audi DTC

Audi DTC P1400 – EGR Valve Circ Electrical Malfunction

DTC P1400 meaning on Audi

The Diagnostic Trouble Code (DTC) P1400 for Audi indicates an Electrical Malfunction in the Exhaust Gas Recirculation (EGR) Valve Circ Electrical System. The EGR system is responsible for recirculating a portion of the exhaust gases back into the engine intake to reduce emissions and control combustion temperatures.

Audi DTC P1400 symptoms

Symptoms of DTC P1400 on an Audi may include:

• Check Engine Light (MIL) illuminated on the dashboard
• Decreased engine performance or rough idling
• In some cases, there may be no noticeable symptoms

Audi DTC P1400 causes

Common causes of DTC P1400 on an Audi include:

• Defective EGR valve
• Wiring or connector issues in the EGR valve circuit
• Faulty EGR position sensor
• Problems with the EGR control module

Audi DTC P1400 seriousness

While DTC P1400 may not always lead to immediate drivability issues, it is important to address this code promptly to prevent potential long-term damage to the engine and ensure optimal emissions control.

How to diagnose DTC P1400 on Audi

To diagnose DTC P1400 on an Audi, you can follow these steps:

1. Use an OBD-II scanner to retrieve the specific fault code and freeze frame data
2. Inspect the EGR valve and associated wiring for any visible damage or corrosion
3. Test the EGR valve position sensor and the EGR control module for proper functionality
4. Perform a voltage and continuity test on the EGR valve circuit to identify any electrical issues

How to fix DTC P1400 on Audi

To fix DTC P1400 on an Audi, you can consider the following steps:

1. Replace the faulty EGR valve if it is determined to be the root cause of the issue
2. Repair or replace any damaged wiring or connectors in the EGR valve circuit
3. If the EGR position sensor or control module is faulty, replace them accordingly
4. Clear the DTC using an OBD-II scanner after completing the repairs

How to erase DTC P1400 on Audi

To erase DTC P1400 on an Audi, you can use an OBD-II scanner to clear the code from the vehicle’s computer. After addressing the underlying issue that caused the fault code, you can reset the Check Engine Light and ensure that the code does not reappear during subsequent driving cycles.

Recommended tools for Audi diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.