Mass or Volume Air Flow ‘A’ Circuit Range/Performance – Air Flow Too High
Table of contents
P00BD VOLVO Possible Causes
- Faulty Mass or Volume Air Flow ‘A’ Sensor
- Mass or Volume Air Flow ‘A’ Sensor harness is open or shorted
- Mass or Volume Air Flow ‘A’ Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How do I fix code P00BD VOLVO?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P00BD VOLVO code
The cost of diagnosing the P00BD VOLVO code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P00BD VOLVO Description
This fault code is stored in the engine control module when the output from the mass airflow sensor is not as expected. The mass airflow sensor is used to measure the volume of airflow entering the engine and is located downstream of the air filter. The density of the incoming air can also be measured. Cold air is denser than warm air and has more oxygen present so the engine fueling can be adjusted accordingly. The exhaust gas recirculation system can be monitored using the mass airflow sensor output. If a large volume of exhaust gases is re-circulated, then a reduction in incoming air will take place. When the engine control module activates the exhaust gas recirculation valve a reduction in mass airflow sensor voltage is expected. If this voltage reduction does not occur, then a fault code for exhaust gas recirculation – insufficient flow detected is stored in the engine control module. When the engine control module deactivates the exhaust gas recirculation valve an increase in mass airflow sensor voltage is expected. If this voltage increase does not occur, then a fault code for exhaust gas recirculation – excessive flow detected is stored in the engine control module. Currently, modern vehicles can have an analog output or a digital output from the mass airflow sensor. An oscilloscope can be used to test the signal. A sensor with an analog output will have a voltage that increases with airflow volume. A sensor with a digital output will have a frequency which varies with airflow volume.