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Possible Causes

Possible Causes
(G139) SUN SENSOR SIGNAL 2 CIRCUIT OPEN OR HIGH RESISTANCE
(G139) SUN SENSOR SIGNAL 2 CIRCUIT SHORTED TO ANOTHER CIRCUIT
(G939) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE
SUN SENSOR
HVAC MODULE

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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