Purge Flow Sensor Circuit Low Input
The P0467 code indicates that the Engine Control Module (ECM) has detected a low voltage signal from the purge flow sensor circuit. This sensor monitors the flow of fuel vapors from the charcoal canister to the engine intake during the evaporative emission system purge cycle. A low input suggests a short to ground, open circuit, or a faulty sensor, which can prevent proper purging and may cause the Check Engine Light to illuminate.
01. Most Common Causes
- Faulty purge flow sensor
- Short to ground in the sensor circuit
- Open circuit in the sensor wiring or connector
- Damaged or corroded sensor connector
- Failed ECM (rare)
02. Symptoms You Will Notice
- Check Engine Light on
- Possible rough idle or hesitation
- Failed emissions test
- Fuel odor from engine bay
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the purge flow sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's voltage and ground circuits with a multimeter; compare to manufacturer specifications.
Step 4: If circuits are okay, replace the purge flow sensor and clear the code.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but the vehicle may fail an emissions test and fuel economy could be affected. It's best to diagnose and repair promptly.
How much does it cost to fix?▼
The typical repair cost ranges from $50 to $150, including parts (sensor) and labor. DIY replacement can be cheaper if you have the tools.