Possible causes
– OD Pressure Switch harness is open or shorted
– OD Pressure Switch circuit poor electrical connection
– Faulty OD Pressure Switch
– Internal transmission damage
– Faulty Engine Control Module (ECM)
– Faulty Transmission Control Module (TCM)
– OD Pressure Switch circuit poor electrical connection
– Faulty OD Pressure Switch
– Internal transmission damage
– Faulty Engine Control Module (ECM)
– Faulty Transmission Control Module (TCM)
Tech description
There is a factory service bulletin for the following Jeep models:
2003-2005 Jeep Wrangler
2003-2005 Jeep Liberty
2003-2005 Jeep Cherokee
Jeep Factory Service Bulletin OBDII Code P0871
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Transmission will not shift gears.
– Transmission will not shift gears.
P0871 JEEP OBD Code Description
The Transmission Control Module (TCM) has detected a fault in the pressure switch assembly
JEEP Related P0871 code
2003 JEEP LIBERTY Electrical System
2003 JEEP WRANGLER Electrical System
2004 JEEP LIBERTY Electrical System
2004 JEEP WRANGLER Electrical System
2005 JEEP LIBERTY Electrical System
2005 JEEP WRANGLER Electrical System
2003 JEEP CHEROKEE Electrical System
2005 JEEP GRAND CHEROKEE Electrical System