P0453 OBD-II Trouble Code: Evaporative Emission Control Pressure Sensor High Input

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0453 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0453 code

P0453 is a diagnostic trouble code (DTC) for "Evaporative Emission Control Pressure Sensor High Input". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0453 DIAGNOSTIC Get a fair and transparent estimate upfront

What the P0452 code means

A P0452 code means that a reading from the engine’s evaporative pressure sensor is higher than normal, indicating changes in pressure that are out of factory specification.

What causes the P0452 code?

Modern emissions systems include an EVAP canister which allows fuel tank vapors to be collected and purged back into the engine, where they can be burnt rather than expelled into the atmosphere. EVAP systems feature a pressure sensor that monitors the system’s integrity, and at regular intervals the EVAP system performs a pressure test on itself, checking that there are no leaks in the system. In a P4052 code instance, the EVAP sensor or fuel tank pressure (FTP) sensor is sending information to the PCM that indicates a higher than normal pressure in the EVAP system. Please note that on some vehicles, the FTP is incorporated into the electric fuel pump assembly in the tank.

What are the symptoms of the P0452 code?

Other than a hard code and illuminated malfunction indicator light (MIL), the only other symptom might be a noticeable smell of raw fuel.

How does a mechanic diagnose the P045 code?

With key on/engine off, use a scan tool to retrieve the code from the engine’s diagnostic connector. Pay close attention to fuel tank pressure readings, using a scan tool.

  • Normal voltages should be around 2.5 volts, and should never exceed 4.5 volts. A reading of around 2.7V with the gas cap off might indicate an intermittent problem.

  • Use a digital volt/ohmmeter to measure voltage at the signal wire while wiggle-testing wiring at the FTP sensor. A fluctuation in voltage during the wiggle-test could point to connector problems such as broken wiring, corrosion or dampness.

  • If the scan tool shows voltages above 4.5V, unplug the sensor (if possible) and recheck the voltage. If voltage is still high with the sensor unplugged, inspect the wiring harness for a short on the signal wire. If high voltage disappears when the sensor is unplugged, check for the sensor’s ground and for proper reference voltage supplying the sensor.

  • If the sensor has a good ground and 5V reference voltage, it’s likely that the sensor itself has failed and needs to be replaced.

  • The pressure sensor can also be tested with a vacuum gauge while connected to the wiring harness, as you observe the data stream’s change on a scan tool.

  • If after replacing the sensor and all test results are within spec, the problem might be with the PCM itself. Remember that failed PCMs are rare and replacing the PCM will require complete reprogramming.

Common mistakes when diagnosing the P0452 code

Technicians often misinterpret the P0452 code to mean problems with the fuel cap, evaporative purge valve or evaporative vent valve.

How serious is the P0452 code?

A P0452 code may not cause any problems in drivability or fuel economy, but is likely to cause your vehicle to fail a state-mandated emissions test.

What repairs can fix the P0452 code?

Additional comments for consideration regarding the P0452 code

For a hard code to register, the EVAP monitor test must present a fault on two consecutive cold starts and drives.

Need help with a P0452 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220.

trouble codes
P0453
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0453 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

4,810

Rating Summary
4,424
187
47
28
124
4,424
187
47
28
124

Joel

19 years of experience
741 reviews
Joel
19 years of experience
Acura RL - Check Engine Light is on - Jacksonville, Florida
very knowledgeable and precise. able to fix electrical issues in my car. Right on time for the appointment.

Christopher

15 years of experience
41 reviews
Christopher
15 years of experience
Honda Accord - Check Engine Light is on - Fairburn, Georgia
Christopher was excellent! He explained everything in detail to make sure I understood. He was professional and provided me with the next course of actions to resolve my care issues. I'm glad he was sent to service my car.

Alexander

18 years of experience
58 reviews
Alexander
18 years of experience
Saab 9-7x - Check Engine Light is on - Kissimmee, Florida
He was very friendly and very helpful . I felt like it was being around a close friend , also gave me so very good advice on my car & future advice about it . Highly recommend mechanic, would use his services again .

Matthew

31 years of experience
639 reviews
Matthew
31 years of experience
Jeep Patriot - Check Engine Light is on - Norfolk, Virginia
Matthew was on time which was a relief, he is very knowledgeable and was easy to understand what was wrong and what was being done. I am recommending to friends and family due to the great experience Matthew gave me. Extremely professional 10/10

More related articles

P0019 OBD-II Trouble Codes: Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B)
P0019 P0019 code definition Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B) What the P0019 code means P0019 is the OBD-II generic code indicating that the crankshaft and Variable Valve Timing (VVT) position sensor B for bank 2...
P2274 OBD-II Trouble Code: O2 (Oxygen) Sensor Signal Stuck Lean Bank 1 Sensor 3
P2274 P2274 code definition O2 (Oxygen) Sensor Signal Stuck Lean Bank 1 Sensor 3 What the P2274 code means This code definition indicates that either the oxygen sensor has failed, there is an exhaust leak before the sensor, or the...
P0515 OBD-II Trouble Code: Battery Temperature Sensor Circuit
P0515 trouble code means there is an issue with the battery temperature sensor circuit often caused by battery corrosion or engine overheating.

Related questions

P0420 code comes back repeatedly, emissions readiness issue. Takes about a week for Check Engine Light to come back on.

If this is the only code that keeps coming up, and the data stream on the oxygen sensors are reacting correctly, the only real other thing left would be the convertor. If there was a wiring issue, or a sensor...

check engine light

When the radiator broke, the engine coolant sensor or other sensors may have set a code in the computer. These codes and the Check Engine Light will not go away until the vehicle is scanned and codes cleared if repairs...

Check Engine light

The Check Engine Light will come on for a number of reasons. Since the light is on, I would start by scanning the computer for codes. The codes will help to isolate the problem. If the light is flashing, then...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com