is an important tool to decipher error codes. Error code P0192 on the Volvo S40i means "Fuel Rail Pressure Sensor Circuit Low Input". A common problem is a defective
Fuel Rail Pressure Sensor
. The first thing to do before replacing the sensor is to depressurise the Fuel System. Make sure you are wearing proper clothing and eye protection when working with fuel systems. Inside the fuse box next to the car battery you can find a fuse clamp.
Use the clamp to remove fuse #74 for the fuel pump relay in the fuse box under the passenger glove compartment.
Start the engine and wait until it stops. I had to wait for more than 2 minutes for the engine to die.
Remove the 2 retaining screws of the air intake that covers the pressure sensor. Disconnect the wiring connector to the sensor. Make sure you place some old rags under the pressure sensor to catch any fuel spillage. Remove the retaining screw of the pressure sensor and slowly remove the pressure sensor. You might hear a pop sound. Replace it with a new one and assemble everything back together.
Total repair time is about 30 minutes.
Hi there,
ReplyDeleteFrom time to time, my Volvo S40 (1.6D) limit's it's performance to 3000RMP. if I Turn Off the vehicle and start it again, the performances comes back! Volvo told me that it could be the pressure sensor, that some times was giving erroneous readings. Did it happen to you the same way?
Not sure. Mine is the 2.4i. I kept getting the P0190 and P0192 codes. From the Hayne's manual, the fuel pressure sensor of diesel engines cannot be replaced sepately from the fuel rail.
ReplyDeletewhat happens if fuse 74 isn't removed and the system isn't depressurized prior to changing the sensor? will any damage to the engine occur?
ReplyDelete