Wednesday, January 1, 2014

P0190, P0192 and P0193 on you Jaguar X-type

These three codes mean that there is something wrong with the fuel pressure sensor circuit. The pressure sensor is located in the fuel rail, and these codes are set when the voltage is out of range, either short to power, short to ground or out of the expected range. The fuel pump is run by the computer which is closely monitoring this sensor. With these codes the computer would start using a default value and the car would run rough, but it would run nonetheless. The way to check this is to disconnect the fuel pressure sensor, and plug your voltmeter to make sure you see a reference voltage, usually around 5 volts. If you see 5 volts, then you most likely need a sensor. If not, then there is either a problem with a wire between the computer and the sensor, which is not likely, or a new computer.

Here are some links to a multi-meter and some needle like leads:
The second probe leads are great for back probing without messing up the connector

1 comment:

  1. hello, good to know about this pressure sensor circuit. Though with these codes the computer would start using a default value and the car would run rough, but it would run nonetheless. Helpful for the users indeed. Thanks.

    ReplyDelete