Liberty, Wrangler, 1997-2005

2.8L L4 VIN 5 Std 6

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Trouble Code: P0735



A/T Gear Ratio Error Fourth Prime

Possible Causes:



Related Gear Ratio trouble codes may be stored (note that some of these Gear Ratio trouble codes may be intermittent)
 
Transmission has internal problems or damage present
 

Trouble Code: P0736



A/T Additional Gear Ratio Error In Reverse Gear

Possible Causes:



Related DTCs will be present
 
Internal transmission mechanical problems may exist
 
Intermittent gear ratio errors are present
 

Trouble Code: P0740



A/T Torque Converter Clutch System Out of Range

Possible Causes:



Related DTCs will be present
 
Internal transmission mechanical problems may exist
 
Intermittent gear ratio errors are present
 

Trouble Code: P0750



A/T Low/Reverse Solenoid Circuit Failure

Possible Causes:



Related relay DTCs present
 
Transmission control relay output circuit open
 
L/R solenoid control circuit open or shorted to ground or to voltage
 
L/R solenoid/pressure switch assembly has malfunctioned or failed
 
Intermittent wiring and connectors
 
PCM has failed
 

Trouble Code: P0755



A/T 2/4 Solenoid Circuit Failure

Possible Causes:



Related DTCs present
 
Transmission control relay output circuit open
 
2/4 Solenoid control circuit is open or shorted to ground
 
2/4 Solenoid control circuit is shorted to system power
 
2/4 Solenoid is damaged or has failed
 
Intermittent wiring or connector problems
 
PCM has failed
 

Trouble Code: P0760



A/T Overdrive Solenoid Circuit Failure

Possible Causes:



Related DTCs present
 
Transmission control relay output circuit open
 
O/D Solenoid control circuit is open or shorted to ground
 
O/D Solenoid control circuit is shorted to system power
 
O/D Solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P0765



A/T Underdrive Solenoid Circuit Failure

Possible Causes:



Related DTCs present
 
Transmission control relay output circuit open
 
U/D Solenoid control circuit is open or shorted to ground
 
U/D Solenoid control circuit is shorted to system power
 
U/D Solenoid is damaged or has failed
 
Intermittent wiring or connector problems
 
PCM has failed
 

Trouble Code: P0770



A/T 4C Solenoid Circuit Malfunction

Possible Causes:



Related Relay DTCs are present
 
Transmission Control Relay output circuit is open
 
4C Solenoid control circuit is open or is shorted to ground or to voltage
 
Transmission Solenoid/TRS Assembly has failed
 
TCM has failed
 
Intermittent wiring and connector problems
 

Trouble Code: P0836



Transfer Case Position Sensor Plausibility Or Improper Voltage Signal

Possible Causes:



Transfer Case Position Sensor has failed
 
Intermittent wiring and/or connector problems
 
Transfer Case Position Sensor signal circuit is open, shorted to ground, shorted to voltage or shorted to Sensor ground circuit
 
ECM has failed
 

Trouble Code: P0841



Low/Reverse Pressure Switch Sense Circuit Malfunction

Possible Causes:



Related DTCs present
 
Loss of Prime P0944 DTC present
 
Transmission control relay output circuit open
 
L/R switch sense circuit is open or is shorted to ground or to voltage
 
L/R pressure switch is damaged or has failed
 
Intermittent wiring or connector problems
 
PCM has failed
 

Trouble Code: P0845



A/T 2/4 Hydraulic Pressure Test Malfunction

Possible Causes:



2/4 pressure is incorrect, or internal transmission faults exist
 
2/4 pressure switch circuit is open, shorted to ground or power
 
2/4 pressure switch is damaged or it has failed
 
Transmission solenoids/TRS assembly is damaged or have failed
 
TCM relay power circuit to 2/4 switch is open (loss of B+)
 
Intermittent wiring or connector problems exist
 
PCM or TCM has failed
 

Trouble Code: P0846



A/T 2/4 Pressure Switch Circuit Malfunction

Possible Causes:



2/4 pressure is incorrect, or internal transmission faults exist
 
2/4 pressure switch circuit is open, shorted to ground or power
 
2/4 pressure switch is damaged or it has failed
 
TCM relay power circuit to L/R switch is open (loss of B+)
 
PCM/TCM has failed
 

Trouble Code: P0850



A/T Park/Neutral Switch Performance

Possible Causes:



Check for any TCM related codes stored in the TCM controller
 
PCM has failed
 

Trouble Code: P0864



TCM Torque Reduction Signal Error

Possible Causes:



ECM has failed
 
Torque Management Request signal circuit is open, shorted to ground, shorted to voltage
 
TCM has failed
 
Intermittent condition
 

Trouble Code: P0868



A/T Line Pressure Low

Possible Causes:



Related Relay DTCs may be present
 
5v supply circuit is open or is shorted to ground or to voltage
 
Poor Line Pressure Sensor connection
 
Pressure Control Solenoid control circuit is shorted to voltage
 
Internal transmission problems
 
Line Pressure Sensor has failed
 
Plugged filter
 
TCM has failed
 
Intermittent wiring and connector problems
 

Trouble Code: P0869



A/T Line Pressure High

Possible Causes:



Related Relay DTCs may be present
 
5v supply circuit is open or is shorted to ground
 
Poor Line Pressure Sensor connection
 
Pressure Control Solenoid control circuit is open or is shorted to ground
 
Internal transmission problems (line pressure high)
 
Line Pressure Sensor has failed
 
TCM has failed
 
Intermittent wiring and connector problems
 

Trouble Code: P0870



A/T Hydraulic Pressure Line Malfunction

Possible Causes:



Check for related line pressure trouble codes
 
Check for related speed ratio and pressure switch codes
 
5v supply circuit is open or is shorted to ground
 
Transmission Control Relay output circuit is open
 
OD Pressure Switch sense circuit is shorted to ground or to voltage
 
Excessive debris in the oil pan
 
Line pressure Sensor connector is loose or damaged
 
Oil pressure switch is damaged or has failed
 
Intermittent wiring or connector problems exist
 
PCM or TCM has failed
 

Trouble Code: P0871



A/T O/D Pressure Switch Circuit Malfunction

Possible Causes:



Related DTCs may be present
 
O/D pressure is incorrect, or internal transmission faults exist
 
O/D pressure switch circuit is open, shorted to ground or power
 
O/D pressure switch is damaged or it has failed
 
TCM relay power circuit to O/D switch is open (loss of B+)
 
Intermittent wiring or connector problems exist
 
PCM or TCM has failed
 

Trouble Code: P0875



A/T U/D Hydraulic Pressure Test Malfunction

Possible Causes:



Check for related line pressure trouble codes
 
Check for related speed ratio and pressure switch codes
 
5v supply circuit is open or shorted to ground
 
U/D Pressure switch sense circuit is open or shorted to ground or to voltage
 
Excessive debris in the oil pan
 
Line pressure Sensor connector is loose or damaged
 
U/D Oil Pressure Switch is damaged or it has failed
 
TCM has failed
 
Intermittent wiring and connector problems
 

Trouble Code: P0876



A/T U/D Pressure Switch Sense Malfunction

Possible Causes:



U/D pressure is incorrect, or internal transmission faults exist
 
U/D pressure switch circuit is open, shorted to ground or power
 
U/D pressure switch is damaged or it has failed
 
TCM relay power circuit to L/R switch is open (loss of B+)
 
TCM has failed
 

Trouble Code: P0884



Power-Up Automatic Transmission Speed Malfunction

Possible Causes:



TCM power supply circuit to direct battery is open
 
TCM power supply circuit to the ignition switch is open
 
TCM power ground circuit is open or the connector is loose
 
TCM has failed
 

Trouble Code: P0888



A/T Relay Output Malfunction

Possible Causes:



Fused B+ circuit is open
 
TC relay output circuit is open or is shorted to ground
 
TC relay control circuit is open or is shorted to ground
 
TC relay ground circuit is open
 
TC relay has failed
 
Intermittent wiring or connector problems exist
 
Transmission solenoid/pressure switch assembly has malfunctioned or failed
 
PCM/TCM has failed
 

Trouble Code: P0890



A/T TCM Switched Battery Circuit Malfunction

Possible Causes:



2/4 switch circuit is shorted to system power (B+)
 
L/R switch circuit is shorted to system power (B+)
 
O/D switch circuit is shorted to system power (B+)
 
TCM switched battery circuit is damaged
 
Intermittent wiring or connector problems exist
 
PCM/TCM has failed
 

Trouble Code: P0891



A/T TCM Relay Always On

Possible Causes:



TCM relay output circuit is shorted to system power (B+)
 
TCM relay control circuit is shorted to system power (B+)
 
TCM relay is damaged or it has failed (it may be stuck closed)
 
Intermittent wiring or connector problems exist
 
PCM/TCM has failed
 

Trouble Code: P0897



A/T Transmission Fluid Burnt Or Worn Out

Possible Causes:



Automatic transmission fluid is burnt or contaminated
 
Automatic transmission fluid is worn out
 

Trouble Code: P0932



A/T Line Pressure Sensor Malfunction

Possible Causes:



Poor line pressure connection
 
Poor wiring connection
 
Internal transmission problems
 
TCM has failed
 
Intermittent wiring and connector problems
 

Trouble Code: P0934



A/T Line Pressure Sensor Low

Possible Causes:



5v supply circuit is open or is shorted to ground
 
Line Pressure Sensor signal circuit is shorted to ground
 
Line Pressure Sensor has failed
 
TCM has failed
 
Intermittent wiring and connector problems
 

Trouble Code: P0935



A/T Line Pressure Sensor High

Possible Causes:



Line Pressure Sensor ground circuit is open
 
Line Pressure Sensor signal circuit is open or is shorted to voltage
 
Line Pressure Sensor has failed
 
TCM has failed
 
Intermittent wiring and connector problems
 

Trouble Code: P0944



A/T Loss Of Prime Pressure

Possible Causes:



A/T pressure switch connector is damaged, loose or shorted
 
Invalid PRNDL code (shift lever position error)
 
Automatic transmission fluid level is too low
 
Transmission oil filter is clogged or severely restricted
 
Transmission oil pump is damaged or weak
 
Intermittent wiring or connector problems exist
 

Trouble Code: P0952



A/T AutoStick Sensor Circuit Malfunction

Possible Causes:



AutoStick assembly is damaged or has failed
 
Intermittent wiring or connector problems exist
 
Downshift sense or Upshift sense circuit is shorted to ground
 
PCM/TCM has failed
 

Trouble Code: P0953



A/T AutoStick Sensor Circuit High

Possible Causes:



AutoStick assembly is damaged or has failed
 
Intermittent wiring or connector problems exist
 
Downshift sense or Upshift sense circuit is shorted to ground
 
PCM/TCM has failed
 

Trouble Code: P0987



A/T 4C Hydraulic Pressure Test Malfunction

Possible Causes:



Check for related speed ratio and pressure switch codes
 
Excessive debris in the oil pan
 
5v supply circuit is open or is shorted to ground
 
Transmission Control Relay output circuit is open
 
4C Pressure Switch sense circuit is shorted to ground or to voltage
 
Line Pressure Sensor connector is loose or damaged
 
4C Line Pressure Sensor has failed
 
Transmission Solenoid/TRS Assembly has failed
 
Internal transmission problems
 
TCM has failed
 
Intermittent wiring and connector problems
 

Trouble Code: P0988



A/T 4C Pressure Switch Sense Circuit Malfunction

Possible Causes:



4C pressure is incorrect, or internal transmission faults exist
 
4C Pressure Switch sense circuit is open, shorted to ground or power
 
4C Pressure Switch is damaged or it has failed
 
TCM Relay power circuit to L/R switch is open (loss of B+)
 
PCM/TCM has failed
 
Intermittent wiring and connector problems
 

Trouble Code: P0992



A/T 2/4 & O/D Hydraulic Pressure Test Malfunction

Possible Causes:



2/4 pressure switch circuit is open, shorted to ground or power
 
2/4 pressure switch is damaged or it has failed
 
O/D pressure switch circuit is open, shorted to ground or power
 
O/D pressure switch is damaged or it has failed
 
Internal transmission faults exist
 
TCM relay power circuit to 2/4 or O/D switch open (loss of B+)
 
PCM/TCM has failed
 

Trouble Code: P1101



ACM Crash Signal Received

Possible Causes:



Clear DTC
 
Examine airbag system integrity
 
Check connections and grounds
 

Trouble Code: P1102



Viscous/Cabin Heater Relay Error

Possible Causes:



ASD Relay output circuit is open
 
Cabin Heater Relay has failed
 
Cabin Heater Relay control circuit is open, shorted to voltage, or to ground
 
ECM has failed
 

Trouble Code: P1115



General Temperature Sensor Performance

Possible Causes:



Sensor signal circuit is open or shorted to ground
 
Sensor ground circuit is open or shorted to VREF (5v)
 
One or more of the identified Sensors is out-of-calibration
 
Ambient air temperature Sensor is damaged or it has failed
 
PCM High or Low circuit is damaged or it has failed
 

Trouble Code: P1131



Glow Plug Module Voltage Supply

Possible Causes:



Battery supply circuit is open
 
Ground circuit is open
 
Intermittent condition
 
Glow Plug Control Module has failed
 

Trouble Code: P1132



Glow Plug Module Internal Fault

Possible Causes:



Battery supply circuit is open
 
Ground circuit is open
 
Intermittent condition
 
Glow Plug Control Module has failed
 

Trouble Code: P1135



Glow Plug Module Control Circuit Fault

Possible Causes:



ECM has failed
 
Glow Plug Module has failed
 
Glow Plug Module control circuit is open or is shorted to voltage or to ground
 
Intermittent condition
 

 
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