Engine-Codes - Toyota - P0452 Toyota

P0452 Toyota Code - Evaporative Emission Control System Pressure Sensor / Switch Low Input

- Code Popularity: 25,031 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC P0452 Toyota?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Canister Pump Module
  • Canister Pump Module harness is open or shorted
  • Canister Pump Module circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

Code Tech Notes

There is a factory service bulletin for the following Toyota models:

2003-2004 Toyota 4Runner
2003-2004 Toyota Tundra
2004 Toyota Camry
2004 Sienna
2004 Highlander
2004 Solara
Toyota Factory Service Bulletin OBDII Code P0452

⚠ Does your Toyota have Safety Recalls? → Check here

How to Fix the DTC P0452 Toyota?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Search for P0452 Toyota Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P0452 Toyota code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P0452 Toyota Code Mean?

5 hours after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the Evaporative Emission (EVAP) system. The Engine Control Module (ECM) monitors for leaks and actuator malfunctions based on the EVAP pressure. The leak detection pump creates negative pressure through the reference orifice. When the system is normal, the EVAP pressure is between 97 to 100 kPa(abs) [726 to 750 mmHg(abs) (Typical value)] and saturated within a minute. If the canister pressure sensor voltage output (pressure) is less than 0.45 V: 42.11 kPa(abs) [315.867 mmHg(abs)], the ECM interprets this as an open or short circuit in the canister pressure sensor or its circuit, and stops the EVAP system monitor. The ECM then illuminates the MIL and stores the Diagnostic Trouble Code (DTC).
The Canister Pump Module is attached to the EVAP Canister and contains the Canister Pressure Sensor, the Leak Detection Pump, and the Vent Valve.
P0452 Toyota Code - Evaporative Emission Control System Pressure Sensor / Switch Low Input

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