P1140 – Hyundai DTC

Hyundai DTC P1140 – Engine load monitoring (MAFfrP) -signals not plausible

DTC P1140 meaning on Hyundai

DTC P1140 on a Hyundai refers to Engine load monitoring (MAFfrP) – signals not plausible. This diagnostic trouble code indicates that the signals received from the Mass Air Flow (MAF) sensor are not within the expected range for the engine load conditions.

Hyundai DTC P1140 symptoms

Symptoms of DTC P1140 on a Hyundai may include:

• Check Engine Light illuminated
• Reduced engine performance
• Poor fuel efficiency
• Engine stalling or hesitation

Hyundai DTC P1140 causes

Common causes of DTC P1140 on a Hyundai include:

• Faulty Mass Air Flow (MAF) sensor
• Dirty or contaminated MAF sensor
• Vacuum leaks in the intake system
• Issues with the air intake system

Hyundai DTC P1140 seriousness

DTC P1140 should not be ignored as it can lead to poor engine performance and reduced fuel efficiency. Continuing to drive with this fault may cause further damage to engine components.

How to diagnose DTC P1140 on Hyundai

To diagnose DTC P1140 on a Hyundai, follow these steps:

1. Use a diagnostic scanner to retrieve the trouble codes
2. Inspect the MAF sensor for any visible damage or contamination
3. Check for vacuum leaks in the intake system
4. Perform a visual inspection of the air intake system components

How to fix DTC P1140 on Hyundai

To fix DTC P1140 on a Hyundai, you can:

1. Clean or replace the MAF sensor if faulty
2. Repair any vacuum leaks in the intake system
3. Ensure proper installation of the air intake system components
4. Clear the trouble codes and reset the Check Engine Light

How to erase DTC P1140 on Hyundai

To erase DTC P1140 on a Hyundai:

1. Use a diagnostic scanner to clear the trouble codes
2. Ensure the underlying issue has been addressed and fixed
3. Perform a test drive to verify that the code does not return

Recommended tools for Hyundai 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.