P0839...

[MMeier]

... WTh does this one mean?? Buddy looked it up on his Snap On scanner and said something about aftermarket scan tool errors and dealer only tool needed?? Any ideas? I 'm thinking it is tied into my brake and ABS lights coming on at will.

 

[Bob Wagner]

thank you marco

code reader says





4WD switch circuit high

 

[artie]

Here is what 04 Power Train Diag manual says



Symptom:

P0839-4WD MODE SENSOR HIGH



When Monitored and Set Condition:

P0839-4WD MODE SENSOR HIGH



When Monitored: Continuously with the ignition key on.



Set Condition: When the 4WD Mode Sensor input circuit voltage raises above 4. 78 volts

for 5. 72 seconds.



POSSIBLE CAUSES

TRANSFER CASE POSITION SENSOR INPUT CIRCUIT OPEN

TRANSFER CASE POSITION SENSOR INPUT CIRCUIT SHORT TO VOLTAGE

TRANSFER CASE POSITION SENSOR

POWERTRAIN/ENGINE CONTROL MODULE

INTERMITTENT OPERATION

 

[MMeier]

Any idea if this could be tied into my ABS and brake lights lighting up at will? Thats when I was able to pull this one, right after they came on. Thanks again!!