Liberty, Wrangler 2006-2007

4.0L L6 VIN S Auto 4

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Trouble Code: P0688



ASD RELAY SENSE CIRCUIT LOW

Possible Causes:



VERIFY ASD DTC
 
ASD RELAY
 
(A209) FUSED B+ CIRCUITS
 
(K334) ASD RELAY OUTPUT CIRCUIT OPEN (NO START)
 
(K334) ASD RELAY OUTPUT CIRCUIT SHORTED TO GROUND
 
(K334) ASD RELAY OUTPUT CIRCUIT OPEN (START)
 
PCM
 

Trouble Code: P0700



TRANSMISSION CONTROL SYSTEM (MIL REQUEST)

Trouble Code: P0706



CHECK SHIFTER SIGNAL

Possible Causes:



CONDITION P0706 PRESENT
 
TRS T1 SENSE CIRCUIT OPEN
 
TRS T3 SENSE CIRCUIT OPEN
 
TRS T41 SENSE CIRCUIT OPEN
 
TRS T42 SENSE CIRCUIT OPEN
 
TRS T1 SENSE CIRCUIT SHORT TO GROUND
 
TRS T3 SENSE CIRCUIT SHORT TO GROUND
 
TRS T41 SENSE CIRCUIT SHORT TO GROUND
 
TRS T42 SENSE CIRCUIT SHORT TO GROUND
 
TRS T1 SENSE CIRCUIT SHORT TO VOLTAGE
 
TRS T3 SENSE CIRCUIT SHORT TO VOLTAGE
 
TRS T41 SENSE CIRCUIT SHORT TO VOLTAGE
 
TRS T42 SENSE CIRCUIT SHORT TO VOLTAGE
 
TRANSMISSION RANGE SENSOR
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0711



TRANSMISSION TEMPERATURE SENSOR PERFORMANCE

Possible Causes:



RELATED DTC-S PRESENT
 
TRANSMISSION TEMPERATURE SENSOR
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0712



TRANSMISSION TEMPERATURE SENSOR LOW

Possible Causes:



RELATED DTC-S PRESENT
 
TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
 
TRANSMISSION TEMPERATURE SENSOR
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0713



TRANSMISSION TEMPERATURE SENSOR HIGH

Possible Causes:



TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
 
TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
 
TRANSMISSION TEMPERATURE SENSOR
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0714



TRANSMISSION TEMPERATURE SENSOR INTERMITTENT

Possible Causes:



RELATED DTC-S PRESENT
 
TRANSMISSION TEMPERATURE SENSOR
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0715



INPUT SPEED SENSOR ERROR

Possible Causes:



INPUT SPEED SENSOR SIGNAL CIRCUIT OPEN
 
SPEED SENSOR GROUND CIRCUIT OPEN
 
INPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO GROUND
 
INPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
 
SPEED SENSOR GROUND CIRCUIT SHORT TO VOLTAGE
 
INPUT SPEED SENSOR ERROR
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0720



OUTPUT SPEED SENSOR ERROR

Possible Causes:



INTERMITTENT WIRING AND CONNECTORS
 
OUTPUT SPEED SENSOR SIGNAL CIRCUIT OPEN
 
SPEED SENSOR GROUND CIRCUIT OPEN
 
OUTPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO GROUND
 
OUTPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
 
SPEED SENSOR GROUND CIRCUIT SHORT TO VOLTAGE
 
OUTPUT SPEED SENSOR ERROR
 
TRANSMISSION CONTROL MODULE
 

Trouble Code: P0725



ENGINE SPEED SENSOR CIRCUIT

Possible Causes:



INTERMITTENT WIRING & CONNECTORS CONDITIONS
 
EATX RPM SIGNAL CIRCUIT OPEN
 
EATX RPM SIGNAL CIRCUIT SHORTED TO GROUND
 
EATX RPM SIGNAL CIRCUIT SHORTED TO VOLTAGE
 
TRANSMISSION CONTROL MODULE
 
POWERTRAIN CONTROL MODULE
 

Trouble Code: P0731



GEAR RATIO ERROR IN 1ST

Possible Causes:



RELATED DTC-S PRESENT
 
INTERMITTENT GEAR RATIO ERRORS
 
INTERNAL TRANSMISSION
 

Trouble Code: P0732



GEAR RATIO ERROR IN 2ND

Possible Causes:



RELATED DTC-S PRESENT
 
RELATED PRESSURE SWITCH DTC-S PRESENT
 
INTERMITTENT GEAR RATIO ERRORS
 
TRANSMISSION - INTERNAL
 

Trouble Code: P0733



GEAR RATIO ERROR IN 3RD

Possible Causes:



RELATED DTC-S PRESENT
 
TRANSMISSION SOLENOID PRESSURE SWITCH ASSEMBLY
 
INTERNAL TRANSMISSION
 
INTERMITTENT GEAR RATIO ERRORS
 

Trouble Code: P0734



GEAR RATIO ERROR IN 4TH

Possible Causes:



RELATED DTC-S PRESENT
 
RELATED PRESSURE SWITCH DTC-S PRESENT
 
INTERMITTENT GEAR RATIO ERRORS
 
TRANSMISSION - INTERNAL
 

Trouble Code: P0736



GEAR RATIO ERROR IN REVERSE

Possible Causes:



RELATED DTC-S PRESENT
 
INTERMITTENT GEAR RATIO ERRORS
 
TRANSMISSION - INTERNAL
 

Trouble Code: P0740



TCC OUT OF RANGE

Possible Causes:



RELATED DTC-S PRESENT
 
INTERNAL TRANSMISSION
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0750



LR SOLENOID CIRCUIT

Possible Causes:



RELATED RELAY DTC-S PRESENT
 
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
 
L/R SOLENOID CONTROL CIRCUIT OPEN
 
L/R SOLENOID CONTROL CIRCUIT SHORT TO GROUND
 
L/R SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE
 
L/R SOLENOID
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0755



2/4 SOLENOID CIRCUIT

Possible Causes:



RELATED RELAY DTC-S PRESENT
 
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
 
2/4 SOLENOID CONTROL CIRCUIT OPEN
 
2/4 SOLENOID CONTROL CIRCUIT SHORT TO GROUND
 
2/4 SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE
 
2/4 SOLENOID
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0760



OD SOLENOID CIRCUIT

Possible Causes:



RELATED RELAY DTC-S PRESENT
 
INTERMITTENT WIRING AND CONNECTORS
 
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
 
OD SOLENOID CONTROL CIRCUIT OPEN
 
OD SOLENOID CONTROL CIRCUIT SHORT TO GROUND
 
OD SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE
 
OD SOLENOID
 
TRANSMISSION CONTROL MODULE
 

Trouble Code: P0765



UD SOLENOID CIRCUIT

Possible Causes:



RELATED RELAY DTC-S PRESENT
 
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
 
UD SOLENOID CONTROL CIRCUIT OPEN
 
UD SOLENOID CONTROL CIRCUIT SHORT TO GROUND
 
UD SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE
 
UD SOLENOID
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0841



LR PRESSURE SWITCH SENSE CIRCUIT

Possible Causes:



LOSS OF PRIME DTC P0944 PRESENT
 
TRANSMISSION CONTROL RELAY DTCS PRESENT
 
TCM AND WIRING
 
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
 
L/R PRESSURE SWITCH SENSE CIRCUIT OPEN
 
L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
 
L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0845



2/4 HYDRAULIC PRESSURE TEST FAILURE

Possible Causes:



LOSS OF PRIME P0944 PRESENT
 
RELATED DTC-S PRESENT
 
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
 
2/4 PRESSURE SWITCH SENSE CIRCUIT OPEN
 
2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
 
2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
 
INTERNAL TRANSMISSION
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0846



2/4 PRESSURE SWITCH SENSE CIRCUIT

Possible Causes:



TRANSMISSION RELAY DTC-S PRESENT
 
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
 
2/4 PRESSURE SWITCH SENSE CIRCUIT OPEN
 
2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
 
2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
 
2/4 PRESSURE SWITCH
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0850



PARK/NEUTRAL SWITCH PERFORMANCE

Possible Causes:



DRB DISPLAYS P/N & D/R NOT IN CORRECT POSITION
 
TRS T41 SENSE (P/N SENSE) CIRCUIT OPEN
 
TRS T41 SENSE (P/N SENSE) CIRCUIT SHORTED TO GROUND
 
TRANSMISSION RANGE SENSOR
 
PCM
 

Trouble Code: P0870



OD HYDRAULIC PRESSURE TEST FAILURE

Possible Causes:



LOSS OF PRIME DTC P0944 PRESENT
 
RELATED DTC-S PRESENT
 
INTERMITTENT WIRING AND CONNECTORS
 
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
 
OD PRESSURE SWITCH SENSE CIRCUIT OPEN
 
OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
 
OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
 
INTERNAL TRANSMISSION
 
TRANSMISSION CONTROL MODULE
 

Trouble Code: P0871



OD PRESSURE SWITCH SENSE CIRCUIT

Possible Causes:



TRANSMISSION CONTROL RELAY DTCS PRESENT
 
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
 
O/D PRESSURE SWITCH SENSE CIRCUIT OPEN
 
O/D PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
 
O/D PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
 
O/D PRESSURE SWITCH
 
TRANSMISSION CONTROL MODULE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0882



TCM POWER INPUT LOW

Possible Causes:



FUSED B+ CIRCUIT OPEN
 
TRANSMISSION CONTROL RELAY GROUND CIRCUIT OPEN
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0883



TCM POWER INPUT HIGH

Possible Causes:



INTERMITTENT WIRING AND CONNECTORS
 
TRANSMISSION CONTROL RELAY STUCK CLOSED
 
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT SHORT TO VOLTAGE
 
TRANSMISSION RELAY CONTROL CIRCUIT SHORT TO VOLTAGE
 
TRANSMISSION CONTROL MODULE
 

Trouble Code: P0884



POWER UP AT SPEED

Possible Causes:



POWER UP AT SPEED
 

Trouble Code: P0888



RELAY OUTPUT ALWAYS OFF

Possible Causes:



FUSED B+ CIRCUIT OPEN
 
TRANSMISSION CONTROL RELAY GROUND CIRCUIT OPEN
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0890



SWITCHED BATTERY

Possible Causes:



2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
 
L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0891



TRANSMISSION RELAY ALWAYS ON

Possible Causes:



INTERMITTENT WIRING AND CONNECTORS
 
TRANSMISSION CONTROL RELAY STUCK CLOSED
 
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT SHORT TO VOLTAGE
 
TRANSMISSION RELAY CONTROL CIRCUIT SHORT TO VOLTAGE
 
TRANSMISSION CONTROL MODULE
 

Trouble Code: P0897



WORN OUT/BURNT TRANSAXLE FLUID

Possible Causes:



WORN OUT/ BURNT TRANSMISSION FLUID
 

Trouble Code: P0944



LOSS OF PRIME

Possible Causes:



SHIFT LEVER POSITION
 
PLUGGED TRANSMISSION OIL FILTER
 
TRANSMISSION OIL PUMP
 
INTERMITTENT WIRING AND CONNECTORS
 

Trouble Code: P0992



2-4/OD HYDRAULIC PRESSURE TEST FAILURE

Possible Causes:



CONDITION P0992 PRESENT
 

Trouble Code: P1115



GENERAL TEMPERATURE SENSOR PERFORMANCE

Possible Causes:



GOOD TRIP EQUAL TO ZERO
 
TEMPERATURE SENSOR CIRCUT
 
FAULTY SENSOR
 
EXCESSIVE RESISTANCE IN THE SENSOR SIGNAL CIRCUIT
 
EXCESSIVE RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT
 
PCM
 

Trouble Code: P1593



SPEED CONTROL SWITCH NO.1 STUCK

Possible Causes:



SPEED CONTROL SWITCH STATUS
 
SPEED CONTROL SWITCHES
 
(V37) S/C SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT
 
(V37) S/C SIGNAL CIRCUIT SHORTED TO GROUND
 
(V37) S/C SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
 
(V37) S/C SIGNAL CIRCUIT OPEN
 
(K900) SENSOR GROUND CIRCUIT OPEN
 
PCM
 

Trouble Code: P1603



PCM INTERNAL DUAL-PORT RAM COMMUNICATION

Possible Causes:



PCM FUSED IGNITION SWITCH OUTPUT CIRCUIT
 
PCM
 

Trouble Code: P1604



PCM INTERNAL DUAL-PORT RAM READ/WRITE INTEGRITY FAILURE

Possible Causes:



PCM FUSED IGNITION SWITCH OUTPUT CIRCUIT
 
PCM
 

Trouble Code: P1607



PCM INTERNAL SHUTDOWN TIMER RATIONALITY

Possible Causes:



PCM FUSED IGNITION SWITCH OUTPUT CIRCUIT
 
PCM
 

 
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