Cherokee, Grand Cherokee, 1999-2005

4.7L V8 VIN J Auto 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: 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: 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: 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
 

Trouble Code: P2320



Ignition Coil No. 7 Secondary Circuit Insufficient Ionization

Possible Causes:



Cylinder No. 7 spark plug or wire is damaged or it has failed
 
Ignition Coil No. 7 is damaged or it has failed
 
Ignition coil control circuit is open or shorted to ground
 
PCM has failed
 

Trouble Code: P2323



Ignition Coil No. 8 Secondary Circuit Insufficient Ionization

Possible Causes:



Cylinder No. 8 spark plug or wire is damaged or it has failed
 
Ignition Coil No. 8 is damaged or it has failed
 
Ignition coil control circuit is open or shorted to ground
 
PCM has failed
 

Trouble Code: P2503



Charging System Voltage Low

Possible Causes:



Battery sense circuit has a high resistance condition
 
Generator ground circuit has a high resistance condition
 
Generator field ground circuit is open
 
Generator field control circuit is open or shorted to ground
 
Generator is damaged or it has failed
 

Trouble Code: P2700



A/T L/R Inadequate Element Volume Detected

Possible Causes:



L/R volume clutch index is too low
 
TCM L/R volume clutch circuit is damaged or has failed
 

Trouble Code: P2701



A/T 2C Inadequate Element Volume Detected

Possible Causes:



2C volume clutch index is too low
 
TCM 2C volume clutch circuit is damaged or has failed
 

Trouble Code: P2702



A/T O/D Inadequate Element Volume Detected

Possible Causes:



O/D volume clutch index is too low
 
TCM O/D volume clutch circuit is damaged or has failed
 

Trouble Code: P2704



A/T 4C Inadequate Element Volume Detected

Possible Causes:



4C volume clutch index is too low
 
TCM 4C volume clutch circuit is damaged or has failed
 

Trouble Code: P2706



A/T MS Solenoid Circuit Malfunction

Possible Causes:



Check for a loose connector to the MS solenoid (intermittent)
 
MS solenoid control circuit is open or shorted to ground
 
MS solenoid control circuit is shorted to system power (B+)
 
MS solenoid is damaged or it has failed
 
Transmission control relay output supply circuit is open
 
TCM MS solenoid circuit is damaged or it has failed
 

Trouble Code: U0101



No TCM Bus Message

Possible Causes:



PCI Bus unable to communicate with (DRBIII) scan tool
 
Fused ignition switch output incorrect (off-run-start)
 
Intermittent condition
 
PCM has failed
 

Trouble Code: U0155



No Cluster Bus Message

Possible Causes:



Communication link with instrument cluster has failed
 
Instrument cluster operation improper or has failed
 
PCM has failed
 

Trouble Code: U0168



No SKIM Bus Message

Possible Causes:



Intermittent operation
 
PCI Bus circuit open or shorted from PCM to SKIM
 
Loss of communication between PCM and SKIM
 
SKIM or PCM has failed
 

 
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