Check Gauges and Check engine light

Martijn

Martijn

New Member
Original poster
Joined
Dec 28, 2023
Messages
5
Location
Netherlands
Hi,

Since a while i have some issue's, they came around the same time out of nothing.
I can't put my finger on it

- ABS light is on
- Gauge Check light is on
- Check engine Light is on
- Elektrical cooling fan is always running on High speed as soon as you start the motor

When i read the code it only says P0443, probably something with the canister purge valve.



I have already;
- Checked all fuses ( are OK )
- Check the cooling fan relays ( are OK )
- Checked the wiring ( looks fine )
- Replaced the canister purge valve
- Replaced the thermostat
- Replaced the cooling temperature sensor
- Checked and replaced abs sensors ( looks fine )
- Multiple reset off all codes but they come back as soon as you turn the ignition key.


All gauges look fine, they are all in range, normal voltage / normal oil pressure / normal motor temp.


Jeep Wrangler TJ
2004
2.4L

IMG_8907.jpg
 
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Check grounds?

Send your ECU to @Wranglerfix for a couple of test laps?

Check your 5v source at the ECU or one of the sensors?

Check your ECU wiring harness connectors... could be corroded...one person filled their ECU up with oil from a failed oil sensor.

Keep all your original sensors. Don't assume any of the new ones work. Mopar or Standard Motor Products, sometimes Echlin are the only ones that work consistently.

Inspect your wiring and hoses on top of your fuel pump. What's your fuel pressure at the rail?

-Mac
 
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I checked 5v source, / grounds / wiring and harnas, all according to the manuals, and it looks all fine to me, i think maybe it is the ECM.
I live in the Netherlands, is possible, to send you the ECM, or maybe buy a rebuild one, because i think sending the unit can take a lot of time , or maybe you know some people nearby the Netherlands who can do something like that to ?
 
Forgot to say the car is starting and driving whitout problems, exept, the cooling fan is always on, and the evap purge valve is not working.
 
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