Neon, 2000-2005

2.4L L4 VIN S Std 5

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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: 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: P1105



Throttle Inlet Pressure Sensor Solenoid Circuit Malfunction

Possible Causes:



ASD output circuit to the TIP solenoid is open
 
Throttle inlet pressure Sensor solenoid is damaged or has failed
 
TIP solenoid control circuit is open, shorted to ground or power
 
PCM has failed
 

Trouble Code: P1106



Throttle Inlet Pressure Sensor Solenoid Circuit Malfunction

Possible Causes:



Check the vacuum supply to the turbo surge solenoid unit
 
Inspect the hoses and tubing to the turbo charger assembly
 
Review results of Solenoid Tests (Test 1, 2, 3 and 4 results)
 
Turbocharger assembly is damaged or it has failed
 
Wastegate actuator has failed (due to a mechanical failure)
 

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: P1187



Throttle Inlet Pressure/MAP Correlation

Possible Causes:



Hoses and tubing may be cracked, disconnected or misrouted
 
TIP signal circuit is open
 
Solenoid(s) failed tests
 
TIP Sensor has failed
 
Vacuum passage may be blocked
 
5v supply circuit problem
 
MAP Sensor has failed (internal open)
 
MAP signal circuit is open or is shorted to ground
 
PCM has failed
 

Trouble Code: P1188



Throttle Inlet Pressure Sensor Signal Range/Performance

Possible Causes:



ASD output circuit to the TIP solenoid is open
 
Throttle inlet pressure Sensor solenoid is damaged or has failed
 
TIP solenoid control circuit is open, shorted to ground or power
 
PCM has failed
 

Trouble Code: P1189



Throttle Inlet Pressure Sensor Circuit Low Input

Possible Causes:



TIP Sensor VREF circuit is open
 
TIP Sensor signal circuit is open
 
TIP Sensor signal circuit is shorted to chassis or Sensor ground
 
TIP Sensor is damaged or it has failed
 
PCM has failed
 

Trouble Code: P1190



Throttle Inlet Pressure Sensor Circuit High Input

Possible Causes:



TIP Sensor VREF circuit is open
 
TIP Sensor signal circuit is open
 
TIP Sensor signal circuit is shorted to chassis or Sensor ground
 
TIP Sensor is damaged or it has failed
 
PCM has failed
 

Trouble Code: P1195



O2 (B1 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
 
PCM has failed
 

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
 

Trouble Code: P1282



Fuel Pump Relay Control Circuit Malfunction

Possible Causes:



Fuel pump relay control circuit is open or shorted to ground
 
Fuel pump relay power circuit is open (test power from Ignition)
 
Fuel pump relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P1294



Target Idle Speed Not Reached

Possible Causes:



Engine vacuum leak in a hose, brake booster or in the engine
 
IAC motor control circuits open or grounded in the wire harness
 
Throttle body dirty or restricted (trying cleaning it and retesting)
 
Throttle linkage or throttle plate not in the correct position
 
PCM has failed
 

Trouble Code: P1296



5-Volt VREF Supply Not Present

Possible Causes:



MAP Sensor VREF circuit open between the Sensor and PCM
 
MAP Sensor ground circuit open between the Sensor and PCM
 
MAP Sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1297



No Change In MAP Signal From Start To Run Transition

Possible Causes:



Engine vacuum port to MAP Sensor clogged, dirty or restricted
 
MAP Sensor signal is skewed or the Sensor is out-of-calibration
 
MAP Sensor VREF circuit open or grounded (intermittent fault)
 
PCM has failed
 

Trouble Code: P1388



Auto Shutdown Relay Control Circuit Malfunction

Possible Causes:



ASD relay control circuit is open between the relay and PCM
 
ASD relay control circuit is shorted to ground
 
ASD relay power circuit is open (test power from Fused B+)
 
ASD relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P1389



No Auto Shutdown Relay Output Voltage To PCM

Possible Causes:



ASD relay connector is damaged, loose or shorted
 
ASD relay output circuit is open between the relay and PCM
 
ASD relay power circuit is open (test power from Fused B+)
 
ASD relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P1391



CKP Or CMP Sensor Signal Intermittent

Possible Causes:



Camshaft Sensor is not installed properly
 
Engine valve timing is not within specifications
 
Perform a CKP and CMP Sensor relearn with the scan tool
 
Tone wheel or pulse ring is damaged
 

Trouble Code: P1398



Misfire Adaptive Numerator At Limit

Possible Causes:



Base engine problem (i.e., low cylinder compression)
 
CKP Sensor crankshaft target variation too large
 
CKP Sensor improperly installed or the CKP Sensor has failed
 
CKP Sensor signal circuit open or shorted (intermittent fault)
 
Tone wheel or pulse ring is damaged
 

Trouble Code: P1486



EVAP Leak Detection Monitor Pinched Hose Detected

Possible Causes:



EVAP vapor hose blocked between the fuel tank and the LDP (i.e., in the OLFV, rollover or vapor hose)
 
EVAP canister is clogged or full of dirt or moisture
 
EVAP ventilation solenoid is damaged or has failed
 
Purge line is loose, damaged or incorrectly routed
 
PCM has failed
 

Trouble Code: P1492



Battery Temperature Sensor Circuit High Input

Possible Causes:



BTS signal circuit is open between the Sensor and the PCM
 
BTS ground circuit is open between the Sensor and the PCM
 
BTS (Sensor) is damaged or the PCM has failed
 

Trouble Code: P1493



Battery Temperature Sensor Circuit Low Input

Possible Causes:



BTS circuit is shorted to ground between Sensor and the PCM
 
BTS (Sensor) is damaged or has failed
 
PCM has failed
 

Trouble Code: P1494



EVAP Leak Detection Pump Switch Or Mechanical Fault

Possible Causes:



LDP switch signal circuit is open or shorted to ground
 
LDP switch power circuit is open (test power to Fused Ignition)
 
LDP vacuum hose is clogged, loose or restricted
 
LDP assembly is damaged or has failed (the switch has failed)
 

Trouble Code: P1495



Leak Detection Pump Solenoid Circuit Malfunction

Possible Causes:



LDP power supply circuit from the ignition switch is open
 
LDP solenoid control circuit is open or shorted to ground
 
LDP assembly is damaged or it has failed
 
PCM has failed
 

Trouble Code: P1593



Speed Control Switch Stuck Operation

Possible Causes:



Intermittent speed control switch 1/2 stuck DTC
 
S/C switches or Steering Column Control Module malfunctioning
 
S/C signal circuit open or shorted ground or to battery voltage
 
S/C switch signal circuit shorted to switch return circuit
 
S/C Sensor ground open
 
PCM has failed
 

Trouble Code: P1598



A/C Pressure Sensor Circuit High Input

Possible Causes:



A/C pressure Sensor circuit is open or shorted to VREF (5v)
 
A/C pressure Sensor ground circuit is open
 
A/C pressure Sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1599



A/C Pressure Sensor Circuit Low Input

Possible Causes:



A/C pressure Sensor circuit is shorted to ground
 
A/C pressure Sensor power circuit is open
 
A/C pressure Sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1602



PCM Not Programmed

Possible Causes:



Program the PCM and then retest for this same trouble code
 
PCM has failed
 

Trouble Code: P1603



Powertrain Control Module Internal Dual-Port Ram Communication

Possible Causes:



Fused ignition switch output is missing (off-start-run circuit)
 
PCM is damaged or it has an internal failure
 

Trouble Code: P1604



PCM Internal Dual-Port Ram Read/Write Integrity Failure

Possible Causes:



Fused ignition switch output is missing (off-start-run circuit)
 
PCM is damaged or it has an internal failure
 

Trouble Code: P1607



Powertrain Control Module Internal Shutdown Timer Rationality

Possible Causes:



Fused ignition switch output is missing (off-start-run circuit)
 
PCM is damaged or it has an internal failure
 

Trouble Code: P1652



Serial Communication Link Malfunction

Possible Causes:



TCM cannot communicate with the Instrument Cluster (MIC)
 
TCM cannot communicate with the Powertrain Control Module
 
PCM/TCM is damaged or it has an internal failure
 

Trouble Code: P1682



Charging System Voltage Too Low

Possible Causes:



Battery positive or Fused Ignition circuit has high resistance
 
Generator drive belt out-of-adjustment or worn out
 
Generator field circuit has a high resistance condition
 
PCM has failed
 

Trouble Code: P1684



Battery Has Been Disconnected

Possible Causes:



Quick Learn procedure was performed with scan tool
 
TCM battery direct (B+) circuit is open or disconnected
 
TCM power ground circuit is open
 
PCM/TCM was disconnected or it has been replaced
 

Trouble Code: P1687



No Cluster Bus Messages

Possible Causes:



Data Bus circuit from SKIM to PCM is damaged or it is open
 
PCM unable to communicate with the Body Control Module
 
PCM has failed, or the SKIM is damaged or has failed
 

 
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