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Check engine light on code is p0452 what is this and how do you fix it

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This is the evporative emission system pressure sensor low input.

Big terminoloy, but easy fix, hopefully ! Check your fuel has a valve in it that maybe stuck open...allowing vapor from the fuel tank to release all the time.

You will need to erase the code to ensure that it does not return !!

Posted on May 27, 2011


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Code p0452 pressure sensor low input what's the fix?

The Evaporative Emission System (EVAP) control system pressure sensor detects pressure in the purge line. The sensor output voltage to the Engine Control Module (ECM) increases as pressure increases. The EVAP control system pressure sensor is not used to control the engine system. It is used only for on board diagnosis. If the sensor has the correct input voltage the sensor could be defective.
Read more:

Sep 04, 2015 | GMC Sonoma Cars & Trucks

1 Answer

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

1 Answer


P0452 Would indicate Evaporative emmision ( EVAP) pressure sensor low input , this could mean that there is a short in the sensor wiring leaning more towards a short to earth , the pressure sensor itself or as last resort the (ECM) as a rule the tubing leading from the gastank to the purge valve canister , the canister itself and the tube leading all the way to the intake manifold via the purge valve should not escape inspection. See if the gascap fits well and is properly in position .
Hope this helps a bit ,
Faldih Higgins

Jun 15, 2014 | 2006 Dodge Grand Caravan

1 Answer

My 2001 saturn is trying to turn over and start but wont check engine light code p0452

P0452 Saturn Fuel Tank Pressure Sensor Circuit Low Voltage
"P0452 - Evaporative Emission Control System Pressure Sensor Low Input. Evaporative Emission Control System Pressure Sensor Low Input indicates a low voltage problem in the Fuel Tankicon1.png Pressure Sensor (FTPS). What the fuel FTP sensor does is convert fuel tank absolute pressure into electrical signals and inputs the signal to the ECM/PCM, (Computer).
First thing to do is make sure the gas cap is good and tightened properly. Then check the vacuumicon1.png lines and wiring at the FTPS (Location-Fuel Tank) to be sure they are good, clean and tight.
Barring a wiringicon1.png problem it can be a bad FTPS or PCM.
I copied this blog on the code p0452. So, check gas cap, check vacuum lines from fuel tank and trace the lines making sure there is no break. check wire plug on the fuel tank pressure sensor.

May 16, 2014 | Cars & Trucks

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Code P0452 keeps coming up and the check engin light is on

P0452 is related to the Evaporative Emissions Control system and has nothing to do with the 4WD system.
The P0452 may be something as simple as a loose or bad gas cap.
The 4WD system is somewhat complicated and requires more diagnostics.

Mar 19, 2014 | 1998 GMC Envoy

1 Answer

P0452 code

tank pressure sensor

May 03, 2013 | 2005 Saab 9-5 Sedan

1 Answer

My 99 alero has emission code P0452 how. Can I fix it

P0452 - Evaporative Emission Control System Pressure Sensor Low Input.
An excessively low voltage from the sensor is sent to ECM.

The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the ECM increases as pressure increases. The EVAP control system pressure sensor is not used to control the engine system. It is used only for on board diagnosis.

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

Possible causes
- The EVAP control system pressure sensor circuit is open or shorted
- EVAP control system pressure sensor may be faulty

Possible solution
- Retight gas cap - Replaced EVAP Control System Pressure Sensor

Hope this helps.

Jun 02, 2011 | Oldsmobile Alero Cars & Trucks

2 Answers

2006 F150 Ford , engine light came on - gave code P0452 - what is this and how can I fix it?

There is a chance it went off because of the gas cap. Take it off and check the cap.

Feb 28, 2011 | 2006 Ford F-150

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