P0453 Evaporative Emissions Control System Pressure Sensor High Input
OBD-II Trouble Code Technical Description
Evaporative Emissions Control System Pressure Sensor High Input
What does that mean?
This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model.
The EVAP (Evaporative Emissions) System allows fuel tank vapors to be purged into the engine and burnt rather than expelled into the atmosphere as harmful emissions. The EVAP system contains a pressure sensor to check the integrity of the system.
Periodically, the EVAP system performs a pressure test to check that there are no leaks in the system. It uses this sensor, also known as a fuel tank pressure (FTP) sensor to check for leaks. Basically P0453 means the PCM (Powertrain Control Module) noticed the EVAP Pressure sensor or FTP is indicating a higher than normal pressure (above 4.5 Volts) in the EVAP system. NOTE: On some vehicles the FTP is a part of the fuel pump assembly in the tank.
There will likely be no noticeable symptoms along with this code other than the MIL (Malfunction Indicator Lamp), commonly known as Check Engine Light illumination. However, there may be noticeable fuel odors in some cases.
A P0453 DTC trouble code may be caused by one or more of the following:
- Open on FTP sensor signal wire
- Short to voltage on FTP sensor signal wire
- Bad FTP sensor
- Abnormally high pressure in fuel tank due to blockage in EVAP purge hoses or overfilled tank
- Loose/damaged FTP sensor connector
- Loss of ground to the sensor
Using an scan tool access FTP sensor value with Key on Engine off (KOEO). Normal value is usually somewhere near 2.5 Volts at atmospheric pressure (may fluctuate some due to altitude). It shouldn't ever be above 4.5 Volts.
1) If it is close to 2.7V with the gas cap off, the problem is likely intermittent. Using a Digital Volt Ohm Meter, measure the voltage on the signal wire while trying to induce the problem by wiggle testing all the wiring at the FTP sensor. If the voltage fluctuates when wiggle testing, check for connector problems; i.e. water in the connector, broken or chafed wiring.
2) If the value shown on the scan tool is above 4.5V, unplug the sensor (if possible) and check for voltage again. If the high voltage is still present when unplugged, inspect wiring harness for a short to voltage on the signal wire. If the high voltage disappears when unplugging the sensor, check for a good ground to the sensor and proper reference voltage. If you have a good ground and 5 Volts reference voltage, replace the FTP sensor since it's likely shorted out.
Related P0453 DTC Discussions
- Explorer P1400 went to P0113, P0118, P0123, P0453, P0708 ...
Hi everyone, I am new to this forum and hope to find some help. I have a Ford 2002 explorer with a 4.0L. I had a P1400 code, took the DPFE sensor out to change it. BUT while it was disconnected, started the truck... It ran about 10 sec. before I stopped it. Then I connected the sensor back, but...
- 2005 Crown Vic code P0453
good day to you, my mom's 2005 crown vice has a P0453 code that was read on a scanner from advance auto store, she doesn't have the funds to take it in, I was wondering what you thought about a new gas cap, she said a couple weeks ago her gas got very low and she noticed a strange sound when the ca...
- 1998 windstar 3.0 fuel problem p0453
We put a new fuel pump in our 1998 Ford Windstar van and now we are having a stalling problem. The showed p0453 for the problem, which is called the pressure sensor high input. Where is this located on the van??? We have been having problems with a strong smell of gas on occasion also. But can't ...
- P0453 Mercury 1999 Cougar
My 1999 Mercury Cougar is generating code P0453. I've replaced the Pressure Feedback Sensor and the Vacuum Regulator Sensor and still no luck. In an attempt to isolate the problem, I unplugged every sensor I could find, one at a time (except the fuel tank pressure sensor) and verified a second code ...
- 2000 S10 P0452 and P0453 Codes
I own a 2000 Chevy S10, 4.3L, 120000 miles. I had to replace the entire fuel pump assembly about 6 months ago (I was told the fuel pump itself could not be purchased separately). Truck has been running/starting with no issues. Check engine light would occasionally pop on and disappear. After a s...
- 1997 Ford F-250 P0453
About a year ago I replaced the fuel tank, and was able to get the truck inspected, and things worked ok till about a month ago. Got a check engine code p0455 serious leak detected. I pressurized the tank and went over all the hoses and fittings and sure enough the fuel tank pressure sensor was cra...
- P0453 mercury sable 2002
How to test fuel tank pressure sensor code P0453 what are the color wires to test...
- 2001 4.0 ford ranger w/ p0453 & p0446
So I have an 01 ford ranger and im coming up with codes p0453 (EVAP system pressure sensor high) and p0446 (EVAP system vent control fault). Im not to familiar with the evap system and need to have a BAR ref. approve the 04 4.0 motor swap so I can get it smogged. What parts should I be testing??...
- P0453 on Mazda Tribute 2001
Hi all I have a 2001 tribute and i see there seems to be a lot of Idle problem issues. Well mine is rough idling in the morning when the engine is cold then it is ok. It also brings out the check engine light, scanned the codes got P 0453 - Evaporative System pressure sensor/switch high input. Any ...
- 2005 Ford Ranger 3.0L P0453 code need help
I'm getting a P0453 on my 2005 Ford Ranger 3.0 and need some help tracking this code down. I just had the heads replaced and was wondering if something was left loose or off, it maybe just coincidence I don't drive it much anymore so its been sitting for awhile. Any help would be appreciated. Thanks...
Need more help with a p0453 code?
If you still need help regarding the P0453 trouble code, please post your question in our FREE car repair forums.
NOTE: This information is presented for information purposes only. It is not intended as repair advice and we are not responsible for any actions you take on any vehicle. All information on this site is copyright protected.