P0452 Code - Evaporative Emission Control System Pressure Sensor Low Input

What Does P0452 Mean?

The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will not throw a code. Again, the ELD code likely represents a separate wiring issue. When you see P0452 engine fault code on your engine code reader this description will help you.

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What are the common causes of P0452 ?

In short, the following are common causes of the code P0452:

• Faulty EVAP control system pressure sensor
• Open in the EVAP pressure sensor signal wire
• Short to voltage in the EVAP pressure sensor signal wire
• Bad ground at the EVAP pressure sensor
• Water or corrosion in the EVAP pressure sensor connector
• Unusually high pressure in the fuel tank due to a blocked EVAP hose

How do you troubleshoot P0452 ?

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground.

Process Tips

Diagnostic trouble code P0452 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.
Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before P0452.
Fortunately, P0452 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.



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