Any ideas what this is. I did have the fuel pump replaced a couple months ago.
98 Jimmy I got a service code of PO452. It said something about emission code.
code PO452
Mar 17, 2008
7 Replies
Evaporative Emission Control System Pressure Sensor Low Input
The sensor on the tank is reading low or the wiring is shorted. Wire might have been pinched when the pump was replaced and took a while for the insulation to wear through. Drop the tank and check the harness off the sensor and test the sensor while you have it apart.
Did you check your gas cap?
Dropping tank sounds like more then I can do.
Bad cap wouldn't set this code. It is set because the ECM expects the sensor to be within a set range when it isn't testing the evap system. If it is high or low it sets a code.
If that pressure sensor was shorted and shared circuitry with another critical sensor, yes.
Will this cause the car to stop running or not start?
If it is ONLY the sensor going bad it shouldn't. It will just trigger the SEL. However if the wiring harness is shorting it could be shutting of power to the fuel pump as well.
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required