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Keep getting code p0452 evap sensor was replaced, codes reset. then the code popped up again. what do i check next and how. please help

2004 chevy impala

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Thats for a air conditioning guy

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What does the diagostic code P0452 mean


code p 0452 refers to evaporative emission(EVAP) pressure sensor---low input===causes--wiring short to ground ---EVAP pressure sensor---ECM
check wiring then consider replacing the sensor
leave the ECM to absolute last as the replacement of that unit is expensive

May 06, 2016 | Cars & Trucks

1 Answer

04 escape PO452 code fault


You most likely have a problem with the emission control system on your car which a few components between the gas tank and exhaust manifold. The code you are getting is P0452 which is "Evap Emission Control System Pressure Sensor Low Input". Go to this link for a better description: https://edgeproducts.com/app/uploads/2014/08/customer_support_article-pdf-41.pdf

Nov 23, 2015 | Ford Cars & Trucks

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Received code p0452 from my code reader. No engine light came on.


code p0452 refers to evaporative emission ( EVAP) pressure sensor--low input ===causes wiring short to ground--EVAP pressure sensor---ECM
check for wiring problems from chewed wires form leaving it unattended
check replace the pressure sensor.

Apr 18, 2015 | 1999 Pontiac Montana

2 Answers

Code p0452 on 2001 grand am 3.4 lit


P0452 The definition is evap pressure system low. This mean it detected a no pressure but rather a leak, There is nothing wrong with the pressure sensor or wiring itself,Fist thing to check is the gas cap,make sure the seals is good shape, The hose connection are firm and clamped down,you basically have a evap leak

Nov 23, 2012 | 2001 Pontiac Grand Am SE

2 Answers

1st code p0440, then code p0453 then p0452 now p0446


This problem is out side the gas tank , has nothing to do with the fuel pump or fuel level sending unit inside the gas tank .DTC P0446 EVAP Vent Solenoid Valve Control System . Do you know anything about automotive evaporative emission system ?
Wells EVAP Training with Sgt Tech P0440 P0441 P0442 etc

This DTC tests the evaporative emission (EVAP) system for a restricted or blocked EVAP vent path. The control module commands the EVAP canister purge solenoid Open and the EVAP canister vent solenoid Closed. This allows vacuum to be applied to the EVAP system. Once a calibrated vacuum level has been reached, the control module commands the EVAP canister purge solenoid Closed and the EVAP canister vent solenoid Open. The control module monitors the fuel tank pressure (FTP) sensor for a decrease in vacuum. If the vacuum does not decrease to near 0 inches H2O in a calibrated time, this DTC sets.

Mar 13, 2017 | 2000 Cadillac DeVille

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Po452 and po446 on 04 chevy silverado have replaced fuel pressure sensor and reset but code po452 keep poping up


P0452 evap control pressure low, P0 446 evap vent contol circuit. Becuase you have P0452 you are dealing with a eletrical issue whether you have positive tank pressure or negative pressure, The tool for this is a volt meter.452 happens when you positive pressure and the FTP reads less than 0.1 volts.You need to jump the signal and the reference and monitor the take parameter on a scan data you should read reference voltage.Now if you dont have a scan data tool. inspect the wire for any breaks or shorting 2 thing of concern broken wire to the FTP or a ECM is needed.

Feb 24, 2012 | Chevrolet Silverado 1500 Cars & Trucks

2 Answers

Troubleshooting codes 1998 chevy truck S10 pick up were to find parts on truck ; codes p0171,p0401 ,p0452,p0131


p0171-System Adaptive Fuel Too Lean

p0401-EGR

p0452-EVAP Fuel Tank Pressure Sensor Low Input

p0131-Upstream Heated 02 Sensor Circuit

Hope That Helps.

Jan 15, 2010 | 1998 Chevrolet S-10 Pickup

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2002 Cavalier error code 440 and 452 What do they mean?


This indicates that a part of the Evap control system  is no longer functioning correctly. The Evap system consists of many parts, including (but not limited to) the Gas Cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a cars fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
A code P0440 could mean one or more of the following has happened:
The gas cap is not installed or working properly
The purge solenoid has failed
The canister is plugged and not working properly
TRY this first: Remove and reinstall the gas cap or replace, clear the code, and drive for a day and see if the codes come back.
Inspect the Evap system for cuts/holes in tubes/hoses
Inspect for damaged or disconnected hoses around the Evap purge solenoid
Check and/or replace the sensor
Check and/or replace the purge valve

P0452 Evaporative Emission Control System Pressure Sensor Low Input

Good luck and hope this helps. Recap star with the simple and replace the gas cap with a dealer OEM not a after market. If that does not fix it then change the sensor as indicated with the P0452 code. You can get the sensor from Auto Zone and they can give yo the step by step instruction to get the job done. Good luck and keep me posted. 

Jun 14, 2009 | 2002 Chevrolet Cavalier Coupe

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