AutoCodes – Generic – P1073

P1073 Code - Mass Air Flow Sensor 2 Signal Too Small

Quick Answer

P1073 indicates Mass Air Flow Sensor 2 Signal Too Small. Common causes include Faulty Mass Air Flow Sensor, Mass Air Flow Sensor harness is open or shorted, Mass Air 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: P1073 indicates Mass Air Flow Sensor 2 Signal Too Small.
Common causes: Common causes include Faulty Mass Air Flow Sensor, Mass Air Flow Sensor harness is open or shorted, Mass Air 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 12,744

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 07, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1073 Description

OBDII Code P1073 - Mass Air Flow Sensor 2 Signal Too Small - AutoCodes.com — P1073 Code - Mass Air Flow Sensor 2 Signal Too Small

What does this mean?

What are the Possible Causes of the DTC P1073?

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

How to Fix the DTC P1073?

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 P1073 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 P1073 code?

Need more information on how to fix the P1073 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1073 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1073 Audi — Mass Air Flow Sensor 2 Signal Too Small
P1073 Volkswagen — Mass Air Flow Sensor 2 Signal Too Small

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 P1073 Code

1. What are the common symptoms of OBDII code P1073 (Mass Air Flow Sensor 2 Signal Too Small)?

The common symptoms include rough idling, engine stalling, poor acceleration, and reduced fuel efficiency.

2. What are the possible causes of OBDII code P1073?

Possible causes of this code include a faulty mass air flow sensor, a vacuum leak, a clogged air filter, or issues with the air intake system.

3. How can I diagnose the cause of OBDII code P1073?

Diagnosing the cause typically involves inspecting the mass air flow sensor, checking for vacuum leaks, testing the air filter, and ensuring the air intake system is functioning properly.

4. Can a dirty air filter trigger OBDII code P1073?

Yes, a dirty or clogged air filter can disrupt the airflow to the engine, causing incorrect readings by the mass air flow sensor and triggering the P1073 code.

5. What are the repair options for OBDII code P1073?

Repair options may include cleaning or replacing the mass air flow sensor, fixing any vacuum leaks, replacing the air filter, and addressing any issues in the air intake system.

6. Is it safe to drive with OBDII code P1073 active?

It is not recommended to drive with this code active, as it can lead to poor engine performance and potential damage if left unresolved.

7. Can a DIY enthusiast address OBDII code P1073 at home?

Depending on the underlying cause, some DIY enthusiasts may be able to address this code at home by following repair guides specific to their vehicle's make and model.

8. How important is the mass air flow sensor in vehicle performance?

The mass air flow sensor plays a crucial role in measuring the amount of air entering the engine, which is essential for proper fuel delivery and overall engine performance.

9. Will resetting the OBDII system clear the P1073 code?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not fixed, the code is likely to reappear after driving the vehicle for some time.

10. Can extreme weather conditions impact the mass air flow sensor and trigger OBDII code P1073?

Extreme weather conditions, such as extreme heat or cold, can potentially affect the performance of the mass air flow sensor and contribute to triggering the P1073 code.