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

Our certified mechanics come to you · 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 P0453 code means

A P0453 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 P0453 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 P4053 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 P0453 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 P0453 code

Technicians often misinterpret the P0453 code to mean problems with the fuel cap, evaporative purge valve or evaporative vent valve.

How serious is the P0453 code?

A P0453 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 P0453 code?

Additional comments for consideration regarding the P0453 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 P0453 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 1-800-701-6230.

trouble codes
P0453
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0453 code.

SCHEDULE P0453 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(6,114)

Rating Summary
5,655
221
51
35
152
5,655
221
51
35
152

Kevin

24 years of experience
388 reviews
Kevin
24 years of experience
Chevrolet Tracker - Check Engine Light is on - Stone Mountain, Georgia
Kevin was pretty cool! He explained things to me in a way I could understand and was able to offer me some good options to fix my car problems! Very professional and knew his stuff! Excellent experience

JOHNNY

33 years of experience
63 reviews
JOHNNY
33 years of experience
Toyota Camry - Check Engine Light is on - Carmichael, California
Johnny was early, friendly, and thorough! He explained things to me about my car that I had no idea about before! I booked him for a diagnostic appointment and I’m definitely requesting him for a follow-up!

Benji

22 years of experience
184 reviews
Benji
22 years of experience
Jaguar XK - Check Engine Light is on - Phoenix, Arizona
Will absolutely recommend Benjie to all my friends, thorough and knowledgeable. Will have him back fit all future car repairs!

Marco

29 years of experience
124 reviews
Marco
29 years of experience
Kia Soul - Check Engine Light is on - Riverside, California
Marco was great. Cam on time, and explained everything he did. Also gave good recommendation for fixing as the problem has a Kia recall.


Related questions

Check Engine Light is on with code P0453 - 2002 Chevrolet Silverado 1500

Hello. Most of the time, when this code comes up, it is either caused by a leak in the EVAP system or a failure of the sensor. Typically, the issue is the sensor itself not reading correctly. I will usually...

2 major issues

The code P0453 is for the purge control valve; it's most likely bad and needs to be replaced. The ticking noise is possibly the oil pressure dropping too low at idle and the camshaft followers are getting noisy. Have the...

More related articles

P0014 OBD-II Trouble Code: Camshaft Position B - Timing Over-Advanced or System Performance (Bank 1)
P0014 code definition Camshaft Position “B” - Timing Over-Advanced or System Performance (Bank 1) What the P0014 code means P0014 is the...
P0117 OBD-II Trouble Code: Engine Coolant Temperature (ECT) Sensor Circuit Low Output Problem
P0117 P0117 code definition Engine Coolant Temperature (ECT) sensor circuit low output problem What the P0117 code means P0117 is the OBD-II generic code that indicates the engine control module (ECM) has seen the ECT sensor output go less...
P0025 OBD-II Trouble Code: Camshaft Position B - Timing Over-Retarded (Bank 2)
P0025 P0025 code definition Camshaft Position B - Timing Over-Retarded (Bank 2) What the P0025 code means P0025 is the OBD-II generic code indicating the Engine Control Module (ECM) has determined that the exhaust variable camshaft timing for bank 2...

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 (855) 347-2779 · hi@yourmechanic.com