I have a 2009 Mitsubishi Outlander and I have been getting the engine code P050B this last winter. I bought the SUV new and sense then the Mitsubishi deal closed. The closes one is almost two hours away.

The code has gone away by itself and came back. I have had the code reset and it has come back. It has been on for two weeks now and not gone off, even with the weather warming up.

I have tried to researched this code, but have not had very much luck. The discussions I have found either discuss other vehicle makers or individuals modifying their ECM's.

I tried looking through this forum, but did not find any thread that pertain to the engine code P050B. I apologize if there is one, please direct me to it. If not, does anyone have any knowledge of this code and what would cause it?

I have cleaned my air box and changed the filter. I have read it it may be a thermostat sensor, but that is uncertain.

I would like to find out a little more information before throwing parts at it.

I appreciate any help, thank you.

 

Are you sure the last digit is a B I think you have a P0508.

Check here
P0508 Mitsubishi Idle Air Control Valve Sense Circuit Low OBDII Engine Light Trouble Code | Engine-Codes.com

 

I agree, most likely your B is an 8. Engine codes start with a P followed by four numbers...never three numbers and a letter.

Funny thing was, the service manual does not mention the IAC valve. The IAC is always on the throttle body. Looking at the diagram of the throttle body, it only mentions the throttle position sensor.

 

The print out looks like a "B". It is on the print out twice, but that might be why I can't find anything. It could have been the code readers interpenetration because it has "OEM Brand: Toyota" out beside it, unsure.

I will try your suggestions on the link.

Thanks for the help.

 

I checked the P050B for Toyota and it's the same as P0508 for Mitsu

http://www.micro-tronik.com/faultcod...ode_p050b.html

 

Found this on this forum

Ignition timing retard control (cold start strategy) monitor
P050B Pattern 19

PATTERN 19
Inspection conditions
•Engine coolant temperature: More than 7°C (45°F), less than 41°C (106°F)
•Intake air temperature: More than −10°C (14°F)
•Barometric pressure: More than 76 kPa (22.4 in.Hg)
Test procedure
1.Start the engine with all the accessories switched OFF.
2.Let the engine idle for 1 minute. (During the monitor)
3.Turn the ignition switch to "LOCK" (OFF) position.
4.Start the engine and do Steps 1 to 3 again.
5.Confirm that the diagnostic trouble code (DTC) is not output.

http://www.mediafire.com/download/e2...8ul/ma+out.rar