Ram 1500, 2500, 3500, 2WD and 4WD, 2001-2005

4.7L V8 VIN N Std 9

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Trouble Code: P1798



A/T Transmission Fluid Is Burnt Or Contaminated

Possible Causes:



ATF is burnt, contaminated or very dirty
 
Extremely low battery (system) voltage
 
Transmission pan has debris
 
Transmission has internal damage causing the vehicle shudder
 

Trouble Code: P1799



A/T Calculated Oil Temperature In Use Malfunction

Possible Causes:



TFT Sensor signal circuit is open
 
TFT Sensor ground circuit is open
 
TFT Sensor signal circuit is shorted to ground
 
TFT Sensor signal circuit is shorted to VREF (5v)
 
TFT Sensor signal not correct for the ATF fluid temperature
 
Speed Sensor signal circuit is open or shorted to ground
 
Speed Sensor signal circuit is shorted to system power
 
TCM oil temperature Sensor high or low circuit has failed
 

Trouble Code: P1899



A/T Park Neutral Switch Stuck in Park Position or In Gear

Possible Causes:



P/N switch signal circuit is open between the switch and PCM
 
P/N switch signal circuit is shorted to Sensor or chassis ground
 
P/N switch ground circuit is open (at the switch mounting point)
 
P/N switch is stuck in P/N position, or stuck in Drive position
 
P/N switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P2072



Electronic Throttle Control System Malfunction

Possible Causes:



Throttle plate frozen
 

Trouble Code: P2074



Manifold Pressure/Throttle Position Correlation; High Flow/Vacuum Leak

Possible Causes:



Vacuum leak in hoses or component connections
 
High resistance or resistance to ground in MAP 5v supply or signal circuit
 
MAP Sensor has failed
 
High resistance in MAP ground circuit
 
TP Sensor has failed or is improperly adjusted
 
High resistance or resistance to ground in TP Sensor 5v supply or signal circuit
 
High resistance in TP Sensor ground circuit
 
PCM has failed
 

Trouble Code: P2096



Downstream Fuel System 1/2 Lean

Possible Causes:



Exhaust leak
 
Engine mechanical problem
 
O2 Sensor has failed
 
O2 Sensor signal circuit or return circuit problem
 
Fuel contamination
 

Trouble Code: P2097



Downstream Fuel System 1/2 Rich

Possible Causes:



Exhaust leak
 
Engine mechanical problem
 
O2 Sensor No. 1/2 has failed
 
O2 Sensor No. 1/2 signal circuit or return circuit problem
 
Fuel contamination
 

Trouble Code: P2098



Downstream Fuel System 2/2 Lean

Possible Causes:



Exhaust leak
 
Engine mechanical problem
 
O2 Sensor No. 2/2 has failed
 
O2 Sensor No. 2/2 signal circuit or return circuit problem
 
Fuel contamination
 

Trouble Code: P2099



Downstream Fuel System 2/2 Rich

Possible Causes:



Exhaust leak
 
Engine mechanical problem
 
O2 Sensor No. 2/2 has failed
 
O2 Sensor No. 2/2 signal circuit or return circuit problem
 
Fuel contamination
 

Trouble Code: P2100



Electronic Throttle Control Motor Circuit Malfunction

Possible Causes:



Intermittent condition
 
Throttle plate or bore may have foreign object blockage
 
ETC positive circuit is open or is shorted to battery voltage, to ground, or to ETC negative circuit
 
ETC negative circuit is open or is shorted to battery voltage or to ground
 
Low battery voltage
 
ETC Motor or Throttle Body has failed
 
PCM has failed
 

Trouble Code: P2101



Electronic Throttle Control Motor Malfunction

Possible Causes:



Throttle body assembly may have failed
 
Low battery voltage
 
PCM has failed
 

Trouble Code: P2107



Electronic Throttle Control Module Processor Malfunction

Possible Causes:



PCM requires reprogramming
 

Trouble Code: P2108



Electronic Throttle Control Module Processor Malfunction

Possible Causes:



PCM requires reprogramming
 

Trouble Code: P2110



Electronic Throttle Control Forced Limited RPM

Possible Causes:



Throttle plate stuck
 
ETC positive circuit is open or is shorted to ground
 
ETC negative circuit is open or is shorted to ground
 
ETC motor has failed
 
PCM has failed
 

Trouble Code: P2111



Electronic Throttle Control Forced Limited RPM

Possible Causes:



Throttle plate stuck above Limp Home position
 
TP Sensors 1 & 2 both read 2.5v
 
ETC positive circuit is open or is shorted to ground or to battery voltage
 
ETC negative circuit is open or is shorted to ground
 
PCM has failed
 

Trouble Code: P2112



Electronic Throttle Control Unable To Open

Possible Causes:



Throttle plate stuck at or below Limp Home position
 
ETC positive circuit is open or is shorted to ground
 
ETC negative circuit is open or is shorted to ground or to battery voltage
 
PCM has failed
 

Trouble Code: P2115



Accelerator Pedal Position Sensor No. 1 Minimum Stop Performance

Possible Causes:



APP Sensors must be reprogrammed to relearn
 

Trouble Code: P2116



Accelerator Pedal Position Sensor No. 2 Minimum Stop Performance

Possible Causes:



APP Sensors must be reprogrammed to relearn
 

Trouble Code: P2118



Electronic Throttle Control Motor Circuit Malfunction

Possible Causes:



Throttle plate or bore malfunctions
 
ETC positive circuit is open or is shorted to ground, battery voltage or ETC negative circuit
 
ETC negative circuit is open or is shorted to ground or to battery voltage
 
ETC motor has malfunctioned
 
PCM has failed
 

Trouble Code: P2122



Accelerator Pedal Position Sensor No. 1 Circuit Low

Possible Causes:



5v supply circuit is open or shorted to ground
 
APP Sensor No. 1 signal circuit is open, shorted to ground or to Sensor return circuit
 
APP Sensor No. 1 has failed
 
PCM has failed
 

Trouble Code: P2123



Accelerator Pedal Position Sensor No. 1 Circuit High

Possible Causes:



APP Sensor No. 1 return circuit is open
 
APP Sensor No. 1 signal circuit is shorted to either 5v supply circuit
 
APP Sensor No. 1 has failed
 
PCM has failed
 

Trouble Code: P2127



Accelerator Pedal Position Sensor No. 2 Circuit Low

Possible Causes:



5v supply circuit is open or shorted to ground
 
APP Sensor No. 2 signal circuit is open, shorted to ground or to Sensor return circuit
 
APP Sensor No. 2has failed
 
PCM has failed
 

Trouble Code: P2128



Accelerator Pedal Position Sensor No. 2 Circuit High

Possible Causes:



APP Sensor No. 2 return circuit is open
 
APP Sensor No. 2 signal circuit is shorted to either 5v supply circuit
 
APP Sensor No. 2 has failed
 
PCM has failed
 

Trouble Code: P2135



Throttle Position Sensors 1 & 2 Correlation

Possible Causes:



TP Sensor No. 1 or 2 signal circuit is shorted to ground or to battery voltage
 
TP Sensor No. 1 or 2 signal circuit has high resistance
 
5v supply circuit has high resistance
 
5v supply circuit shorted to ground
 
TP Sensor ground circuit has high resistance
 
TP Sensor No. 1 signal circuit is shorted to Sensor No. 2 signal circuit
 
TP Sensor has failed
 
PCM has failed
 

Trouble Code: P2138



Accelerator Pedal Position Sensors 1 & 2 Correlation

Possible Causes:



APP Sensor No. 1 or 2 signal circuit has high resistance
 
APP Sensor No. 1 or 2 return circuit has high resistance
 
5v supply circuit has high resistance
 
APP Sensor has failed
 
PCM has failed
 

Trouble Code: P2161



Vehicle Speed Sensor No. 2 Erratic

Possible Causes:



Active Bus or Communications DTCs
 
Incorrect tire circumference
 
PCM has failed
 

Trouble Code: P2166



Accelerator Pedal Position Sensor No. 1 Maximum Stop Performance

Possible Causes:



In-Plant test failure
 
APP Sensors must be reprogrammed to relearn
 

Trouble Code: P2167



Accelerator Pedal Position Sensor No. 2 Maximum Stop Performance

Possible Causes:



In-Plant test failure
 
APP Sensors must be reprogrammed to relearn
 

Trouble Code: P2172



High Airflow/Vacuum Leak Detected (Instantaneous Accumulation)

Possible Causes:



Vacuum leak
 
5v supply circuit has high resistance or is shorted to ground
 
MAP signal circuit has high resistance or is shorted to ground
 
TP Sensor ground circuit has high resistance
 
TP Sensor signal circuit is shorted to ground
 
TP Sensor return circuit has high resistance
 
MAP Sensor has failed
 
TP Sensor has failed
 
PCM has failed
 

Trouble Code: P2173



High Airflow/Vacuum Leak Detected (Slow Accumulation)

Possible Causes:



Vacuum leak
 
5v supply circuit has high resistance or is shorted to ground
 
MAP signal circuit has high resistance or is shorted to ground
 
TP Sensor ground circuit has high resistance
 
TP Sensor signal circuit is shorted to ground
 
TP Sensor return circuit has high resistance
 
MAP Sensor has failed
 
TP Sensor has failed
 
PCM has failed
 

Trouble Code: P2174



Low Airflow/Vacuum Leak Detected (Instantaneous Accumulation)

Possible Causes:



Restricted air inlet system
 
5v supply circuit has high resistance or is shorted to ground
 
MAP signal circuit has high resistance or is shorted to ground
 
TP Sensor ground circuit has high resistance
 
TP Sensor signal circuit is shorted to ground
 
TP Sensor return circuit has high resistance
 
MAP Sensor has failed
 
TP Sensor has failed
 
PCM has failed
 

Trouble Code: P2175



Low Airflow/Vacuum Leak Detected (Slow Accumulation)

Possible Causes:



Restricted air inlet system
 
5v supply circuit has high resistance or is shorted to ground
 
MAP signal circuit has high resistance or is shorted to ground
 
TP Sensor ground circuit has high resistance
 
TP Sensor signal circuit is shorted to ground
 
TP Sensor return circuit has high resistance
 
MAP Sensor has failed
 
TP Sensor has failed
 
PCM has failed
 

Trouble Code: P2181



Cooling System Performance

Possible Causes:



Low coolant level
 
ECT signal circuit is open or shorted to ground, Sensor ground, or battery voltage
 
ECT Sensor ground circuit is open
 
Thermostat has failed
 
ECT Sensor has failed
 
PCM has failed
 

Trouble Code: P2299



Brake Pedal Position/Accelerator Pedal Position Incompatible

Possible Causes:



Customer pressing accelerator pedal, then pressing brake pedal and holds both down at the same time
 
Stop lamp switch has failed
 
APP Sensor has failed
 

Trouble Code: P2302



Ignition Coil No. 1 Secondary Circuit Insufficient Ionization

Possible Causes:



Intermittent condition
 
Cylinder No. 1 spark plug or wire is damaged or it has failed
 
Ignition Coil No. 1 is damaged or it has failed
 
Ignition coil control circuit is open or shorted to ground
 
ASD relay output circuit problems
 
PCM has failed
 

Trouble Code: P2305



Ignition Coil No. 2 Secondary Circuit Insufficient Ionization

Possible Causes:



Intermittent condition
 
Cylinder No. 2 spark plug or wire is damaged or it has failed
 
Ignition Coil No. 2 is damaged or it has failed
 
Ignition coil control circuit is open or shorted to ground
 
ASD relay output circuit problems
 
PCM has failed
 

Trouble Code: P2308



Ignition Coil No. 3 Secondary Circuit Insufficient Ionization

Possible Causes:



Intermittent condition
 
Cylinder No. 3 spark plug or wire is damaged or it has failed
 
Ignition Coil No. 3 is damaged or it has failed
 
Ignition coil control circuit is open or shorted to ground
 
ASD relay output circuit problems
 
PCM has failed
 

Trouble Code: P2311



Ignition Coil No. 4 Secondary Circuit Insufficient Ionization

Possible Causes:



Intermittent condition
 
Cylinder No. 4 spark plug or wire is damaged or it has failed
 
Ignition Coil No. 4 is damaged or it has failed
 
Ignition coil control circuit is open or shorted to ground
 
ASD relay output circuit problems
 
PCM has failed
 

Trouble Code: P2314



Ignition Coil No. 5 Secondary Circuit Insufficient Ionization

Possible Causes:



Intermittent condition
 
Cylinder No. 5 spark plug or wire is damaged or it has failed
 
Ignition Coil No. 5 is damaged or it has failed
 
Ignition coil control circuit is open or shorted to ground
 
ASD relay output circuit problems
 
PCM has failed
 

Trouble Code: P2317



Ignition Coil No. 6 Secondary Circuit Insufficient Ionization

Possible Causes:



Intermittent condition
 
Cylinder No. 6 spark plug or wire is damaged or it has failed
 
Ignition Coil No. 6 is damaged or it has failed
 
Ignition coil control circuit is open or shorted to ground
 
ASD relay output circuit problems
 
PCM has failed
 

 
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