OBD-II Code P0104 is associated with the Mass or Volume Air Flow “A” Circuit Intermittent. This code indicates that your vehicle’s Engine Control Module (ECM) has detected an issue with the airflow sensor circuit.
What Does the P0104 Code Mean?
The P0104 code is triggered when the ECM identifies an inconsistent voltage output from the Mass Airflow Sensor (MAF). The MAF measures the amount of air entering the engine and helps the ECM determine the correct fuel quantity and ignition timing for optimal engine performance.
What Causes the P0104 Code?
Several factors can lead to the P0104 code being triggered, including:
- Damaged MAF Sensor wiring
- Loose or corroded electrical terminals in the MAF Sensor circuit
- A faulty MAF Sensor
- A torn or split rubber Mass Air Flow Sensor Intake Boot
What Are the Symptoms of the P0104 Code?
Common symptoms associated with the P0104 code may include:
- Illumination of the Check Engine Light
- Vehicle hesitation or stalling
- Poor fuel mileage
How Serious Is the P0104 Code?
The P0104 code is considered urgent as it can lead to significant issues, including engine damage or safety hazards while driving. Immediate attention is recommended to avoid further complications.
How to Diagnose the P0104 Code
To effectively diagnose the P0104 code, follow these steps:
- Record freeze frame information when the code is triggered.
- Replicate the conditions under which the code was set during a test drive.
- Monitor engine load, throttle position, RPM, and road speed.
- Compare these values to the Mass Air Flow grams per second PID. Significant variations may confirm the issue.
- Perform a “truth test” by checking the Barometric Pressure reading on the scan tool while the engine is idling.
Common Repairs for the P0104 Code
Common repairs for the P0104 code may include:
- Repairing or replacing damaged MAF Sensor wiring
- Tightening or replacing corroded electrical terminals
- Replacing a faulty MAF Sensor
- Replacing a torn or split Mass Air Flow Sensor Intake Boot
How Much Does It Cost to Fix the P0104 Code?
The cost to fix the P0104 code can vary significantly based on the specific repairs needed. On average, expect to spend between $100 to $500, depending on whether you need to replace the MAF Sensor or perform additional electrical repairs.
Can I Fix the P0104 Code Myself?
While some DIY enthusiasts may be able to address wiring issues or replace the MAF Sensor themselves, it’s crucial to have a proper understanding of the vehicle’s electrical systems. In many cases, professional diagnosis may save time and money by preventing unnecessary repairs.
