Need car parts? Select your vehicle
Reading Time: 4 minutes
  • The PCM will log the P010B trouble code when it detects a problem with the mass air flow (MAF) sensor or its circuit.
  • A contaminated or defective MAF sensor, air intake leaks, and wiring issues are some of the problems that could trigger the code.
  • If left unaddressed, a P010B code can result in poor engine output, black smoke emissions, and poor fuel economy.

An on-board diagnostic or OBD-II code alerts you to the potential issues your vehicle may have. But to solve the code, you must first know what issue has caused it to be logged in the system. If you’re finding it difficult to figure out what code P010B means, you’ve come to the right place. Read on to learn about its possible triggers and common symptoms.

What Does the P010B Code Mean?

Diagnostic trouble code (DTC) P010B stands for “Mass or Volume Air Flow “B” Circuit Range/Performance.” This error code is set when the powertrain control module (PCM) perceives a potential problem with the mass air flow (MAF) sensor or its circuit. It is specifically logged when the PCM detects that the signal from the MAF sensor exceeds factory specifications.

See also  P0102 Code: Mass Air Flow (MAF) Circuit Low

The “B” circuit specified in this code varies depending on the make and model of the car. Refer to a repair manual specific to your vehicle to determine the affected circuit.

DriveWire Mass Air Flow Sensor Isolated
The MAF sensor is used to measure the volume and density of air entering the engine.

The MAF sensor is used to measure the volume and density of air entering the engine. It is located on the engine’s air intake tract opposite the air filter. The PCM uses the data provided by the MAF sensor, along with the input from the other sensors, to determine the amount of fuel needed to run the engine properly.

However, if the signal the PCM received from the MAF sensor is determined to go over the expected range, the PCM will log error code P010B. Depending on the severity of the problem, other DTCs may also get stored, such as codes P010A, P010C, P010D, and P010E.

Make sure you fully understand mass air flow before you attempt any DIY troubleshooting of code P010B.

Note: The definition of code P010B may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Possible Causes of the P010B Code?

P010B is a generic code, so it can have several causes. Here are the most common:

What are the Common Symptoms of the P010B Code?

You may notice the following symptoms if you own a vehicle with a stored P010B trouble code:

See also  P0174 Code: System Too Lean (Cylinder Bank 2)

How to Diagnose the P010B Code

Further complications can be prevented by troubleshooting the P010B error code immediately. However, diagnosing this code can be difficult as it shares numerous triggers and symptoms with other DTCs. All cars are built differently, so the diagnostic steps will vary depending on the vehicle’s make and model.

old Asian mechanic diagnose P010B Code
Further complications can be prevented by troubleshooting the P010B error code immediately.

The procedure for diagnosing a P010B on a Nissan may prove different from testing for the same code on a Land Rover. To ensure you’re doing the right steps, always refer to a repair manual specific to your vehicle. However, if you feel that your automotive know-how is still lacking, it would be best to leave the diagnosis to the experts.

How to Fix the P010B Code

Code P010B may be set in vehicles of varying makes and models. It may even share similar causes and symptoms with other DTCs. However, this code can’t be resolved with a blanket solution. Each automaker builds their vehicles differently, so a single solution for different models that have logged the same codes may not work.

See also  P0068 Code: MAP/MAF - Throttle Position Correlation

Always refer to your vehicle’s factory repair information before DIY-ing any repairs. Alternatively, you may opt to bring your vehicle to an auto repair shop for proper diagnosis and repair.

Products Mentioned in this Guide

About The Authors
Richard McCuistian, ASE Certified Master Automobile Technician
Reviewed By Richard McCuistian, ASE Certified Master Automobile Technician

Technical Reviewer at

Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.

CarParts Research Team
Written By Research Team

Automotive and Tech Writers

The Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

Notify of
1 Comment
Inline Feedbacks
View all comments
Philip Garcia

I need to return a part for a different one.

View all Questions & Answers Answers BE PART OF OUR COMMUNITY: Share your knowledge & help fellow drivers Join Now
Copyright ©2023, Inc. All Rights Reserved.