626 1999-2001

2.0L L4 VIN - Auto 5

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Trouble Code: P1621



Key Identification Number Not Registered In The PCM

Possible Causes:



Immobilizer problem during transformation of the "code word"
 
PCM problem during transformation of the "code word"
 
Immobilizer Unit has failed
 
PCM has failed
 

Trouble Code: P1622



Key Identification Number Does Not Match In The PCM

Possible Causes:



An "unregistered" key was used during Step 3 of the Immobilizer Unit replacement procedure
 
A problem occurred during transformation of the Key ID number stored in the PCM
 

Trouble Code: P1623



Code Word or Key ID Number Read/Write Error in the PCM

Possible Causes:



Perform a PCM "reset" procedure - if the same trouble code resets, the PCM has failed
 
Reprogram the Immobilizer Unit after the PCM is replaced
 

Trouble Code: P1624



Immobilizer Communication Error

Possible Causes:



Perform a PCM "reset" procedure
 
Attempt to start the engine three (3) times
 
If the code resets, check for other codes related to a No Start
 
Perform engine diagnostics to determine the cause of No Start
 

Trouble Code: P1633



Battery Overcharge

Possible Causes:



Generator is damaged or has failed (in overcharge condition)
 
PCM has failed
 

Trouble Code: P1650



Power Steering Pressure Switch Circuit Malfunction (Self-Test)

Possible Causes:



PSP signal circuit is open or shorted to ground
 
PSPS ground circuit is open (at the switch mounting point)
 
PSPS is damaged or has failed
 
PCM has failed
 

Trouble Code: P1652



Power Steering Pressure Switch Circuit Malfunction

Possible Causes:



PSP signal circuit is open or shorted to ground
 
PSPS ground circuit is open (at the switch mounting point)
 
PSPS is damaged or has failed
 
PCM has failed
 

Trouble Code: P1701



Transmission Range Sensor Circuit Malfunction

Possible Causes:



TR sensor signal circuit is open (an intermittent fault)
 
TR sensor signal circuit is shorted to ground (intermittent fault)
 
TR sensor signal circuit is shorted to VREF (intermittent fault)
 
TR sensor is damaged or has failed (an intermittent fault)
 
PCM has failed
 

Trouble Code: P1701



Turbine Shaft Sensor Circuit Malfunction

Possible Causes:



TSS signal circuit is open (an intermittent fault)
 
TSS signal circuit is shorted to ground (an intermittent fault)
 
TSS is damaged or has failed (an intermittent fault)
 
PCM has failed
 

Trouble Code: P1702



Transmission Range Circuit Malfunction

Possible Causes:



Damaged TR switch
 
Damaged harness
 
Damaged harness connector
 
Damaged PCM
 

Trouble Code: P1703



Brake Switch Circuit Malfunction (Self-Test)

Possible Causes:



Brake was not depressed at the proper time during KOEO test
 
Brake was depressed all of the time during the KOEO test
 
Brake switch signal circuit shorted to system power (B+)
 
Brake switch is damaged or has failed, or is out of adjustment
 
PCM has failed
 

Trouble Code: P1705



Transaxle Range Switch Circuit Malfunction (Self-Test)

Possible Causes:



The gear selector was not In Park during the Self-Test
 
TR switch is damaged, has failed or is out of adjustment
 
Starter or starter relay is damaged or has failed
 
Backup lamp circuit is open or shorted
 
PCM had failed
 

Trouble Code: P1707



Transaxle Range Switch Circuit Malfunction

Possible Causes:



TR signal circuit shorted between one or more positions
 
TR switch connector is damaged
 
TR switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1708



Transaxle Range Switch Circuit Malfunction

Possible Causes:



TR signal circuit is open between the switch and the PCM
 
TR switch circuit is shorted between the switch and the PCM
 
TR switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1711



Transaxle Fluid Temperature Sensor Circuit Malfunction (Self-Test)

Possible Causes:



ATF level is too low
 
ATF temperature not at operating temperature during the test
 
TFT sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1713



Transaxle Fluid Temperature (TFT) In-Range Low Malfunction

Possible Causes:



-Fluid level not as specified
 
-Damaged TFT sensor
 
-Short to TFT sensor ground circuit in TFT signal harness circuit
 
-Damaged PCM
 

Trouble Code: P1718



Transaxle Fluid Temperature Sensor Circuit Malfunction

Possible Causes:



ATF level is low
 
TFT sensor is damaged (it may be out-of-calibration)
 
TFT sensor signal circuit shorted to power (intermittent fault)
 
PCM has failed
 

Trouble Code: P1742



Torque Converter Clutch (TCC) Solenoid Failed On (MIL On)

Possible Causes:



-Engine: Performance, cooling
 
-Electrical: Battery, input sensors, wiring harnesses, brake switch
 
-Transaxle: Internal transaxle components, linkage, cooling
 

Trouble Code: P1743



Torque Converter Clutch (TCC) Solenoid Failed On (O/D OFF Flash)

Possible Causes:



-Engine: Performance, cooling
 
-Electrical: Battery, input sensors, wiring harnesses, brake switch
 
-Transaxle: Internal transaxle components, linkage, cooling
 

Trouble Code: P1744



Torque Converter Clutch Mechanical Malfunction

Possible Causes:



Brake switch is damaged, out of adjustment or has failed
 
Engine or transmission temperature is too high
 
TCC control valve is stuck in the "off" position
 
An internal transaxle component is damaged or has failed
 
PCM has failed
 

Trouble Code: P1744



Torque Converter Clutch Solenoid Circuit Malfunction

Possible Causes:



-Engine: Performance, cooling
 
-Electrical: Battery, input sensors, wiring harnesses, brake switch
 
-Transaxle: Internal transaxle components, linkage, cooling
 

Trouble Code: P1746



Electronic Pressure Control Solenoid Circuit Malfunction

Possible Causes:



EPC solenoid control circuit is open
 
EPC solenoid control circuit is shorted to system power (B+)
 
EPC solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1747



Electronic Pressure Control Solenoid Circuit Malfunction

Possible Causes:



EPC solenoid control circuit is shorted to ground
 
EPC solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1751



Transmission Shift Solenoid 'A' Circuit Malfunction

Possible Causes:



SSA control circuit is open or shorted to ground
 
SSA control circuit is shorted to system power (B+)
 
SSA is damaged or has failed
 
PCM has failed
 

Trouble Code: P1765



Transmission 3-2 Timing Solenoid Circuit Malfunction

Possible Causes:



3-2/TCCS control circuit to TCM is open or shorted to ground
 
3-2/TCCS control circuit to TCM is shorted to system power
 
3-2/TCCS is damaged or has failed
 
PCM has failed
 

Trouble Code: P1767



Torque Converter Clutch Solenoid Circuit Malfunction (Self-Test)

Possible Causes:



TCC solenoid control circuit is open or shorted to ground
 
TCC solenoid control circuit is shorted to power
 
TCC solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1780



Overdrive Off Switch Circuit Malfunction (Self-Test

Possible Causes:



O/D switch not cycled at the proper time in the KOER Self-Test
 
O/D switch signal circuit is open or shorted to ground
 
O/D switch signal circuit is shorted to VREF or system power
 
O/D switch is damaged, out-of-adjustment or has failed
 
PCM has failed
 

Trouble Code: P1783



Transmission Fluid Temperature Sensor Circuit High Input

Possible Causes:



ATF level is low, or the fluid is contaminated or burnt
 
Vehicle driven with excessive loads, or trailer towing conditions
 
TCC clutch is damaged or has failed (it may be slipping)
 
TFT sensor signal circuit is open (an intermittent fault)
 
Transaxle cooling system is damaged or has failed
 
PCM has failed
 
 

Trouble Code: P1788



A/T 3-2T/CCS Circuit Malfunction

Possible Causes:



3-2/TCCS control circuit is open
 
3-2/TCCS control circuit is shorted to system power (B+)
 
3-2/TCCS is damaged or has failed
 
PCM has failed (the solenoid driver circuit may be open)
 

Trouble Code: P1789



A/T 3-2T/CCS Circuit Malfunction

Possible Causes:



3-2/TCCS control circuit is shorted to ground
 
3-2/TCCS is damaged or has failed
 
PCM has failed
 

Trouble Code: P1901



Turbine Speed Sensor Circuit Malfunction

Possible Causes:



TSS signal circuit is open (an intermittent fault)
 
TSS signal circuit is shorted to ground (an intermittent fault)
 
TSS signal circuit is shorted to system power (intermittent fault)
 
TSS is damaged or has failed
 
PCM has failed
 

Trouble Code: PATS-01



ID Number Unregistered in Immobilizer Unit is Input After Engine Cranking

Possible Causes:



ID number is unregistered in immobilizer unit
 

Trouble Code: PATS-02



ID Number Format Error (voltage range, frequency)

Possible Causes:



Defective transponder in the key
 

Trouble Code: PATS-03



ID Number is Not Input Into Immobilizer Unit After Cranking Engine

Possible Causes:



No transponder in the key
 
Defective transponder in the key (ID number is not output.)
 
Defective coil at steering lock
 
Defective wiring harness between coil and immobilizer unit
 

Trouble Code: PATS-11



Open Circuit in Coil or Wiring Harness Between Immobilizer Unit and Coil

Possible Causes:



Open circuit in coil
 
Poor connection of coil connector
 
Poor connection of immobilizer unit
 
Defective wiring harness between immobilizer unit and coil
 

Trouble Code: PATS-21



Code Word/ID Number Memorized in Immobilizer Unit EEPROM Cannot Be Read

Possible Causes:



Defective immobilizer unit
 

Trouble Code: PATS-24



Open or Short Circuit In Wiring Harness Between Immobilizer Unit and PCM

Possible Causes:



Defective immobilizer unit
 
Defective PCM
 
Poor connection of connector
 
Defective wiring harness
 

Trouble Code: PATS-30



Immobilizer Unit-PCM Communication Error

Possible Causes:



Defective immobilizer unit
 
Defective PCM
 

Trouble Code: SRS-01



SAS Control Module Connector Poor Connection

Possible Causes:



Poor connection of any SAS CM connector
 
Malfunction of SAS CM connector
 

Trouble Code: SRS-02



SAS Control Module

Possible Causes:



SAS CM malfunction
 

 
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