P1447 on Honda
EVAP System Purge Flow Monitoring
P1447 on Honda vehicles indicates evap system purge flow monitoring. Au7o has documented this code across 1 Honda model — most commonly on CR-Z. This is a manufacturer-specific code (common on Nissan, Infiniti, and Honda) meaning the EVAP system's purge flow monitor did not detect the expected flow of fuel vapor during its self-test. The evaporative emissions system captures gasoline vapors and routes them into the engine to be burned, and this monitor checks that vapor is actually flowing when commanded. When too little or no purge flow is detected, the code sets. It points to a restriction, leak, or stuck component in the EVAP/purge path rather than an engine performance fault. Typical repair costs on Honda range from $1,000 to $3,000, depending on the specific model and root cause.
Common Causes of P1447
- •Faulty or stuck EVAP purge volume control valve/solenoid
- •Clogged or restricted EVAP/purge hoses or lines
- •Cracked, disconnected, or leaking vapor hoses
- •Faulty fuel tank pressure or vapor pressure sensor
- •Saturated or restricted charcoal canister
- •Loose or faulty gas cap / sealing fault
- •Damaged wiring or connector to the purge valve
P1447 on Honda by Model
Honda CR-Z(1 issue)
- IMA Hybrid Battery Pack Degradation and Recalibration Issues2011-2016
The CR-Z uses Honda Integrated Motor Assist (IMA) system with a nickel-metal hydride (NiMH) battery pack located behind the rear seats. The battery pack degrades over time, losing capacity and causing the IMA system to become less effective at assisting acceleration and regenerating energy. The battery management system can also lose its calibration, causing incorrect state-of-charge readings and frequent IMA warning lights. In severe degradation, the IMA system shuts down entirely, leaving the car running on the 1.5L engine alone.
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View P1447 across all makes →Frequently Asked Questions
What does P1447 mean on Honda?▼
P1447 stands for "EVAP System Purge Flow Monitoring." This is a manufacturer-specific code (common on Nissan, Infiniti, and Honda) meaning the EVAP system's purge flow monitor did not detect the expected flow of fuel vapor during its self-test. The evaporative emissions system captures gasoline vapors and routes them into the engine to be burned, and this monitor checks that vapor is actually flowing when commanded. When too little or no purge flow is detected, the code sets. It points to a restriction, leak, or stuck component in the EVAP/purge path rather than an engine performance fault. On Honda specifically, this code is documented across 1 model.
What causes P1447 on Honda vehicles?▼
Common causes on Honda: Faulty or stuck EVAP purge volume control valve/solenoid, Clogged or restricted EVAP/purge hoses or lines, Cracked, disconnected, or leaking vapor hoses, Faulty fuel tank pressure or vapor pressure sensor, Saturated or restricted charcoal canister. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1447 on a Honda?▼
Repair costs on Honda range from $1,000 to $3,000, depending on the specific model and root cause.
Which Honda models have P1447 documented?▼
Au7o has documented P1447 on 1 Honda model: CR-Z.