P1411 – OBD-II DTC

OBD-II DTC P1411 – DPFE Sensor Upstream Hose Off Or Plugged

DTC P1411 meaning

DTC P1411 refers to a diagnostic trouble code indicating that the Differential Pressure Feedback EGR (DPFE) sensor’s upstream hose is either disconnected or blocked. The DPFE sensor is responsible for monitoring the pressure difference across the EGR valve, which is crucial for controlling exhaust gas recirculation. When the sensor detects an issue with the upstream hose, it triggers this code to alert the driver or technician of a potential problem in the EGR system.

DTC P1411 symptoms

Common symptoms associated with DTC P1411 may include:

• Check Engine Light illuminated
• Decreased engine performance
• Rough idling or stalling
• Increased emissions
• Poor fuel economy

DTC P1411 causes

Several factors can lead to the triggering of DTC P1411, including:

• Disconnected or damaged upstream hose of the DPFE sensor
• Clogged or blocked hose
• Faulty DPFE sensor
• Issues with the EGR valve
• Vacuum leaks in the EGR system

DTC P1411 seriousness

The seriousness of DTC P1411 can vary. While it may not cause immediate catastrophic failure, it can lead to:

• Increased emissions, which may cause the vehicle to fail emissions testing
• Reduced engine efficiency and performance
• Potential long-term damage to the engine if left unaddressed

It is advisable to diagnose and repair the issue promptly to maintain optimal vehicle performance and compliance with emissions regulations.

How to diagnose DTC P1411

To diagnose DTC P1411, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1411 code.
2. Inspect the DPFE sensor and its hoses for any visible damage or disconnections.
3. Check for blockages in the upstream hose.
4. Test the DPFE sensor using a multimeter to ensure it is functioning correctly.
5. Inspect the EGR valve for proper operation.
6. Look for any vacuum leaks in the EGR system.

How to fix DTC P1411 step-by-step instructions

To fix DTC P1411, follow these step-by-step instructions:

1. Disconnect the battery to ensure safety while working on the vehicle.
2. Inspect the DPFE sensor and its hoses for any signs of damage or disconnection.
3. If the upstream hose is damaged, replace it with a new one.
4. Clear any blockages in the hose if applicable.
5. Test the DPFE sensor for proper voltage and resistance according to manufacturer specifications.
6. If the sensor is faulty, replace it with a new one.
7. Check the EGR valve for proper operation and clean or replace it if necessary.
8. Reconnect the battery and clear the DTC using an OBD-II scanner.
9. Take the vehicle for a test drive to ensure the code does not return.

How to erase DTC P1411

To erase DTC P1411, 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 clear the trouble codes.
5. Disconnect the scanner and start the engine to verify that the code does not reappear.

Recommended tools for OBD-II 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.