Ram Truck 1500, 2500 & 3500 (2006-2008)

4.7L V8 VIN N Auto 6

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Trouble Code: P0715



TCM Input Speed Sensor Circuit Malfunction

Possible Causes:



ISS ground circuit is open or is shorted to voltage
 
ISS signal circuit is open, shorted to ground or to power
 
ISS Sensor is damaged or it has failed
 
Intermittent wiring or connector problems
 
PCM has failed
 

Trouble Code: P0720



TCM Output Speed Sensor Circuit Malfunction

Possible Causes:



OSS ground circuit is open or is shorted to voltage or to ground
 
Speed Sensor ground circuit is open, shorted to ground or to voltage
 
OSS Sensor is damaged or it has failed
 
Intermittent wiring or connector problems
 
PCM or TCM has failed
 

Trouble Code: P0725



A/T Engine Speed Sensor Circuit Malfunction

Possible Causes:



Check for trouble codes related to the CKP Sensor
 
CKP Sensor signal circuit open, shorted to ground or to power
 
CKP Sensor is damaged or has failed (open or shorted)
 
Intermittent wiring or connector problems
 
PCM has failed
 

Trouble Code: P0731



A/T Additional Gear Ratio Error In First Gear

Possible Causes:



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

Trouble Code: P0732



A/T Additional Gear Ratio Error In Second Gear

Possible Causes:



Related DTCs will be present
 
Transmission solenoid/pressure switch assembly has malfunctioned or failed
 
Internal transmission mechanical problems may exist
 
Intermittent gear ratio errors are present
 

Trouble Code: P0733



A/T Additional Gear Ratio Error In Third Gear

Possible Causes:



Related DTCs will be present
 
Transmission solenoid/pressure switch assembly has malfunctioned or failed
 
Internal transmission mechanical problems may exist
 
Intermittent gear ratio errors are present
 

Trouble Code: P0734



A/T Additional Gear Ratio Error In Fourth Gear

Possible Causes:



Related DTCs will be present
 
Transmission solenoid/pressure switch assembly has malfunctioned or failed
 
Internal transmission mechanical problems may exist
 
Intermittent gear ratio errors are present
 

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: 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: 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: 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: P1004



Short Runner Valve Control Performance

Possible Causes:



ASD relay output circuit open or high resistance
 
5 volt supply circuit open or high resistance
 
SRV signal circuit open or high resistance
 
SRV control circuit shorted to ground
 
SRV control circuit open or high resistance
 
Sensor ground circuit open or high resistance
 
Short Runner Valve (SRV) assembly
 
Powertrain Control Module (PCM)
 

Trouble Code: P1005



Manifold Tuning Valve Control Performance

Possible Causes:



MTV control circuit shorted to voltage
 
MTV control circuit shorted to ground
 
MTV control circuit open or high resistance
 
Ground circuit open or high resistance
 
manifold tune valve assembly
 
Powertrain Control Module (PCM)
 

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: P1128



Closed Loop Fueling Not Achieved - Bank 1

Possible Causes:



Fuel delivery system
 
ECT sensor, wiring or connectors
 
MAP sensor, wiring or connectors
 
O2 sensor, wiring or connectors
 
Engine mechanical
 
PCM
 

Trouble Code: P1129



Closed Loop Fueling Not Achieved - Bank 2

Possible Causes:



Fuel delivery system
 
ECT sensor, wiring or connectors
 
MAP sensor, wiring or connectors
 
O2 sensor, wiring or connectors
 
Engine mechanical
 
PCM
 

Trouble Code: P1196



O2 (B2 S1) Circuit Insufficient Activity

Possible Causes:



Base engine mechanical fault affecting more than one cylinder
 
Exhaust leak present in exhaust manifold or exhaust pipes
 
O2 element fuel contamination or has deteriorated
 
O2 signal circuit or ground circuit has high resistance
 

Trouble Code: P1281



Engine Is Cold Too Long

Possible Causes:



Check the operation of the thermostat (it may be stuck open)
 
ECT Sensor signal circuit has high resistance
 
ECT Sensor is damaged or it has failed
 
Inspect for low coolant level or an incorrect coolant mixture
 

 
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