What are the most common causes of MAF/VANE AIRFLOW sensor problems?Ī malfunctioning MAF/VANE AIRFLOW sensor can cause any one or more of the following symptoms: hesitation, stalling, poor fuel economy or poor engine performance. These conditions require unit replacement. The most common causes are: worn vane assembly, cracked housing, or cracked printed circuit board. The most common causes are: cracked circuit boards, burnt sensing elements, poor solder joints, deteriorated conformal coating, or loose printed circuit board components. How can I determine if the MAF/VANE AIRFLOW sensor is bad? What goes bad in VANE AIRFLOW type units? Be sure to check these to prevent damage to the replacement unit. Check for loose or faulty connectors, broken or faulty wiring. Check air filter and air ways for dirt or debris. Over-voltage sources from relays, shorted wiring, cracked printed circuit boards, moisture entering the unit through split air ducts, electrical connections and wiring, air intake obstructions or gas/oil fumes from the engine can cause failure.
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