P1445 Code: Meaning, Symptoms, Causes & Fix

Overview

P1445 is triggered when monitoring logic identifies an issue with Purge Flow Sensor Circuit High Input affecting powertrain controls.

Symptoms

rough operation in certain conditions
check engine light
increased fuel use

Common causes

Broken terminal inside harness affecting purge flow sensor circuit high input
Disconnected or loose connector
Connector pin damage/corrosion or harness stress near related components

How to diagnose P1445

Confirm P1445 and capture freeze-frame data with a professional scan tool.
Inspect wiring, connectors, and grounds related to purge flow sensor circuit high input for obvious defects.
Use a continuity test from module pin to component to identify opens/high resistance.
Check for related DTCs to identify the root-cause chain before replacing parts.
After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code P1445

Moderate: This code is moderate severity: the vehicle may still operate, but fault progression can increase repair cost over time.

Can you drive with P1445?

Most vehicles can be driven short-term with P1445, but postpone heavy load/highway driving until repaired.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

Repair obvious wiring/connector faults first to prevent repeat parts replacement.
Address the root fault mode (open) in the purge flow sensor circuit high input circuit/system.
Apply the required relearn/adaptation procedure if specified by service information.
Road-test and verify P1445 remains cleared under the conditions that originally set the code.

Fix options

Clear corrosion and protect terminals.
Restore continuity and verify pin tension.
Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$200-$900

Common mistakes when diagnosing P1445

Replacing parts without verifying voltage, ground, and signal integrity first.
Ignoring related stored/pending codes that indicate upstream faults.
Skipping post-repair verification drive cycle and readiness checks.

P1445 in common vehicles

P1445 appears across makes such as Mazda, Subaru, Lexus, Jeep. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes P1445?

P1445 is commonly set by open faults affecting purge flow sensor circuit high input.

How much does it cost to fix P1445?

For P1445, repair costs are typically $200-$900 depending on exact root cause, labor rates, and part quality.

Can I clear P1445 without repair?

You can clear P1445 temporarily, but the code usually returns until the underlying fault is corrected.