AutoCodes – Generic – P116D

P116D Code - Air Mass Flow Sensor Signal Gradient Error

Quick Answer

The Engine Control Module (ECM) monitors the Air Mass Flow Sensor. Common causes include Faulty Air Mass Flow Sensor, Air Mass Flow Sensor harness is open or shorted, Air Mass Flow Sensor circuit poor electrical connection. 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: P116D indicates Air Mass Flow Sensor Signal Gradient Error.
Common causes: Common causes include Faulty Air Mass Flow Sensor, Air Mass Flow Sensor harness is open or shorted, Air Mass Flow Sensor circuit poor electrical connection.
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.

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Code Popularity 3,112

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 26, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P116D Description

The Engine Control Module (ECM) monitors the Air Mass Flow Sensor. The ECM sets the OBDII code when the Air Mass Flow Sensor is no factory specifications.

OBDII Code P116D - Air Mass Flow Sensor Signal Gradient Error - AutoCodes.com — P116D Code - Air Mass Flow Sensor Signal Gradient Error

What does this mean?

What are the Possible Causes of the DTC P116D?

Faulty Air Mass Flow Sensor
Air Mass Flow Sensor harness is open or shorted
Air Mass Flow Sensor circuit poor electrical connection

How to Fix the DTC P116D?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P116D code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P116D code?

Need more information on how to fix the P116D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P116D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P116D BMW — Air Mass Flow Sensor Signal Gradient Error
P116D Buick — O2 Pump Current Control Circuit (NOx Sensor 1)
P116D Cadillac — O2 Pump Current Control Circuit (NOx Sensor 1)
P116D Chevrolet — O2 Pump Current Control Circuit (NOx Sensor 1)
P116D GMC — O2 Pump Current Control Circuit (NOx Sensor 1)
P116D MINI — Air Mass Flow Sensor Signal Gradient Error

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 P116D Code

1. What are the common symptoms of OBDII code P116D (Air Mass Flow Sensor Signal Gradient Error)?

- Common symptoms include poor engine performance, rough idling, stalling, decreased fuel efficiency, and potential stalling during acceleration.

2. What are the possible causes of OBDII code P116D?

- The code P116D can be triggered by issues such as a faulty air mass flow sensor, vacuum leaks, wiring problems, or a dirty air filter.

3. How can I diagnose the cause of OBDII code P116D?

- Diagnosing the code typically involves checking the air mass flow sensor for proper operation, inspecting for any vacuum leaks, testing the wiring connections, and ensuring the air filter is clean.

4. Can I drive my vehicle with OBDII code P116D?

- It is not recommended to drive your vehicle with code P116D as it can lead to further damage and potentially unsafe driving conditions. It's best to address the issue promptly.

5. How do I repair OBDII code P116D?

- Repairing the code may involve cleaning or replacing the air mass flow sensor, repairing any vacuum leaks, checking and repairing wiring connections, and replacing the air filter if necessary.

6. Will resetting the OBDII code P116D make it go away permanently?

- Simply resetting the code may temporarily clear the error, but if the underlying issue is not fixed, the code is likely to reappear. It's essential to address the root cause of the problem.

7. Can a DIY enthusiast fix OBDII code P116D at home?

- Depending on your level of automotive expertise, you may be able to address some aspects of the issue at home, such as cleaning the air filter or checking for obvious vacuum leaks. However, more complex repairs may require professional assistance.

8. How much does it cost to repair OBDII code P116D at a mechanic?

- The cost of repairing OBDII code P116D can vary depending on the specific issue causing the code and the labor rates of the mechanic. It's advisable to get a diagnostic assessment to determine the exact cost.

9. Is it necessary to replace the air mass flow sensor for OBDII code P116D?

- In many cases, a faulty air mass flow sensor is the primary cause of code P116D, and replacing it may be necessary to resolve the issue. However, proper diagnosis is crucial before replacing any components.

10. How often should I check the air mass flow sensor to prevent OBDII code P116D?

- It's recommended to include the air mass flow sensor in your regular vehicle maintenance schedule, such as during tune-ups or when experiencing symptoms like poor engine performance. Regular checks can help prevent issues that trigger code P116D.