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P145F Acura Code - Evaporative Emission Leak Check Module Pressure Sensor Range/Performance Problem

Quick Answer

The P145F code indicates a problem with the Evaporative Emission (EVAP) system, specifically related to the pressure sensor range or performance. Common causes include Faulty Vacuum PumpFaulty Vacuum Pump MotorFaulty Control ValveReference orifice flow quantity is excessiveReference orifice flow quantity is too lowDamaged or disconnected EVAP hoses. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P145F Acura indicates Evaporative Emission Leak Check Module Pressure Sensor Range/Performance Problem.
Common causes
Common causes include Faulty Vacuum PumpFaulty Vacuum Pump MotorFaulty Control ValveReference orifice flow quantity is excessiveReference orifice flow quantity is too lowDamaged or disconnected EVAP hoses.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 02, 2025
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Code P145F Acura Description

The P145F code indicates a problem with the Evaporative Emission (EVAP) system, specifically related to the pressure sensor range or performance. The EVAP system plays a crucial role in controlling fuel vapors and preventing them from escaping into the atmosphere, thereby reducing emissions and improving air quality. When the vehicle is turned off and meets specific conditions, the Powertrain Control Module (PCM) initiates a diagnostic test of the EVAP system. This test involves creating a pressure differential between the EVAP canister and the atmosphere. If the PCM detects that the pressure readings do not fall within the specified range during this test, it triggers the P145F code.

OBDII Code P145F Acura - Evaporative Emission Leak Check Module Pressure Sensor Range/Performance Problem
P145F Acura Code - Evaporative Emission Leak Check Module Pressure Sensor Range/Performance Problem

Common Causes of P145F Acura

  1. Faulty Vacuum Pump
  2. Faulty Vacuum Pump Motor
  3. Faulty Control Valve
  4. Reference orifice flow quantity is excessive
  5. Reference orifice flow quantity is too low
  6. Damaged or disconnected EVAP hoses

Symptoms of P145F Acura

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Decreased fuel efficiency
  3. Rough idling or stalling
  4. Difficulty starting the engine
  5. Unusual fuel odor near the vehicle
  6. Failed emissions test

How to Fix P145F Acura

  1. Perform a visual inspection of the EVAP system components, including hoses and connections, for any signs of damage or disconnection.
  2. Test the vacuum pump and its motor for proper operation; replace if faulty.
  3. Check the control valve for functionality and replace if it is not operating correctly.
  4. Measure the reference orifice flow quantity to ensure it is within the specified range; adjust or replace as necessary.
  5. Clear the diagnostic trouble code and perform a follow-up test to confirm that the issue has been resolved.
  6. If problems persist, consider further diagnostics to identify any underlying issues within the EVAP system.

Cost to Fix P145F Acura

The cost to diagnose and repair the P145F code typically ranges from $150 to $600, depending on the specific components that need attention. Labor costs can vary significantly, with most shops charging between $80 and $150 per hour. Dealerships may charge higher rates, while independent shops may offer more competitive pricing. The total cost will also depend on the make and model of the vehicle, as well as the location of the repair shop.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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