Code p1143 I need to know what that code means

u1100 is can comms system timeout. You can easily find out the rest yourself.

All On Board Diagnostic (OBD2) error codes are standard across all cars and you can google the code online to find the meaning.


Alternatively look online for a full list of OBD2 error codes and keep it in your garage.

genden .com/code reader can tell you

Hello there!

P1143 Pressure Sensor Circuit Low Input Possible Causes

* Pressure sensor vacuum line damaged, loose or disconnected * Pressure sensor signal circuit is open or shorted to ground * Pressure sensor reference (5v) circuit is open or shorted to ground * Pressure sensor has failed

Tests/Procedures:

Check for a 5 volt reference on the reference wire Check the voltage on the signal signal wire. 4.0-4.2V KOEO (key on engine off), 2.0-2.3V with manifold vacuum applied. And be sure it has a good ground key on engine off and running.

Source: Subaru master mechanic (Brian)

The P1143 means Air Assist Control Valve Range/Performance.
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We are assumin gthat you are talking about DTC P1443 - Evaporative Emission Control System - Vacuum System - Purge Control Solenoid or Purge Control Valve fault.

Best guess without pinpoint testing would be the purge flow sensor. This is the most common failure for this code but can be caused by anything that would limit flow across the sensor when flow is commanded by the PCM restricted cannister,stuck or plugged cannister vent solenoid,etc....

On the base model it is located in the purge line between the carbon cannister and the purge solenoid. See pic below for base model diagram(click HERE for zoom)...





Click HERE for zoom...



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Hope thie helps.

P1143 Air assist control valve range/performance

Could Be your mass air flow sensor. Start there.

Transmission Mechanical Failure - First and Reverse

Cannovices,
You may want to take a look at these threads...

http://forums.nasioc.com/forums/showthread.php?t=907787&highlight=p1143+code

http://forums.nasioc.com/forums/showthread.php?t=89878&highlight=p1143+code

http://forums.nasioc.com/forums/showthread.php?t=90071&highlight=p1143+code

15 -vehicle speed sensor 52 oxygen sensor- rich mixture.