Engine Control System - Tests W/Codes - DTC P1537-U1193

Model Identification
DTC P1537
- DTC P1537: A/C Request Circuit Low Voltage (4.0L "G" Body)
DTC P1538
- DTC P1538: A/C Request Circuit High Voltage (4.0L "G" Body)
DTC P1539
- DTC P1539: A/C Clutch Status Circuit Voltage High (5.7L "F" & "Y" Bodies)
DTC P1540
- DTC P1540: A/C System-High Pressure (4.0L "G" Body)
DTC P1542
- DTC P1542: A/C System High Pressure/High Temperature (4.0L "G" Body)
DTC P1545
- DTC P1545: A/C Clutch Relay Control Circuit (3.0L "V" Body)
  - Notes
  - Circuit Description
DTC P1546
- DTC P1546: A/C Clutch Relay Circuit Fault (3.4L "U" Series)
- DTC P1546: A/C Clutch Relay Circuit Fault (3.8L "F"Body)
- DTC P1546: A/C Clutch Status Circuit Voltage Low (5.7L "F" & "Y" Bodies)
DTC P1554
- DTC P1554: Cruise Control Status Circuit (3.1L "N" & "W" Bodies & 3.4L "N" Body & "U" Series)
- DTC P1554: Cruise Engaged Circuit High Voltage (3.5L "W" Body)
- DTC P1554: Cruise Control Status Circuit (3.8L "C", "G", "H" & "W" Bodies)
- DTC P1554: Cruise Engaged Circuit High Voltage (4.0L "G" Body)
- DTC P1554: Cruise Engaged Circuit High Voltage (4.6L "E" & "K" Bodies - DEVILLE & ELDORADO)
- DTC P1554: Cruise Control Feedback Circuit (4.6L "K" Body - SEVILLE)
DTC P1555
- DTC P1555: EVO Circuit Fault (1.9L SATURN - DOHC)
DTC P1560
- DTC P1560: Cruise Control-Transaxle Not In Drive (4.0L "G" Body)
- DTC P1560: Transaxle Not In Drive-Cruise Control Disabled (4.6L "K" Body - SEVILLE)
DTC P1564
- DTC P1564: ECM Battery Voltage Loss (3.0L "V" Body)
- DTC P1564: Vehicle Acceleration Too High-Cruise Control Disabled (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1566
- DTC P1566: Engine Rpm Too High-Cruise Control Disabled (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1567
- DTC P1567: Cruise Control Disabled-ABCS Active (4.0L "G" Body & 4.6L "K" Body - SEVILLE)
DTC P1570
- DTC P1570: Traction Control Active-Cruise Control Disabled (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1571
- DTC P1571: TCS Desired Torque Circuit (3.4L "U" Series)
- DTC P1571: TCS Desired Torque Circuit (3.5L "W" Body)
- DTC P1571: TCS Desired Torque Circuit (3.8L "C", "G", "H" & "W" Bodies)
- DTC P1571: TCS Desired Torque Circuit (3.8L "F" Body)
- DTC P1571: TCS Pulse Width Modulated (PWM) Circuit No Frequency (4.0L "G" Body)
- DTC P1571: TCS Torque Request Circuit (4.6L "E" & "K" Bodies)
- DTC P1571: ASR Desired Torque Circuit (5.7L "Y" Body)
DTC P1573
- DTC P1573: EBTCM/Pcm Serial Data Circuit (3.4L "N" Body)
- DTC P1573: EBTCM/Pcm Serial Data Circuit (3.4L "U" Series)
- DTC P1573: EBTCM/Pcm Serial Data Circuit (3.8L "G" Body)
DTC P1574
- DTC P1574: Stoplight Switch Control Circuit (3.8L "F" Body)
- DTC P1574: Stoplight Switch Circuit (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1574: Stoplight Switch Control Circuit (5.7L "Y" Body)
DTC P1575
- DTC P1575: Extended Travel Brake Switch Circuit High (4.0L "G" Body)
- DTC P1575: Extended Travel Brake Switch Circuit (4.6L "E" & "K" Bodies)
- DTC P1575: Extended Travel Brake Switch Circuit High (5.7L "Y" Body)
DTC P1579
- DTC P1579: Park/Neutral-To-Drive/Reverse Throttle Angle-Power Reduction Mode Active (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1580
- DTC P1580: Cruise Control Move Circuit Voltage Low (1.9L SATURN)
DTC P1581
- DTC P1581: Cruise Control Move Circuit Voltage High (1.9L SATURN)
DTC P1582
- DTC P1582: Cruise Control Direction Circuit Low Voltage (1.9L SATURN)
DTC P1583
- DTC P1583: Cruise Control Direction Circuit High Voltage (1.9L SATURN)
DTC P1584
- DTC P1584: Cruise Disengage (1.9L SATURN)
DTC P1585
- DTC P1585: Cruise Inhibit Control Circuit (3.4L "U" Series)
- DTC P1585: Cruise Inhibit Control Circuit (3.5L "W" Body)
DTC P1599
- DTC P1599: Engine Stall Detected (1.9L SATURN)
- DTC P1599: Engine Stall Or Near Stall Detected (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1601
- DTC P1601: Pcm Serial Communication (1.9L SATURN)
  - Circuit Description
  - Diagnostic Procedures
- DTC P1601: ECM Over-Temperature (3.0L "V" Body)
  - Circuit Description
  - Diagnostic Procedures
DTC P1602
- DTC P1602: Abs Message Fault (1.9L SATURN)
- DTC P1602: Knock Sensor Module Circuit (3.0L "V" Body)
  - Circuit Description
  - Diagnostic Procedures
- DTC P1602: EBCM/EBTCM Serial Data Circuit (3.1L "N" & "W" Bodies)
- DTC P1602: EBCM/EBTCM Serial Data Circuit (3.4L "N" Body)
- DTC P1602: Loss Of EBTCM Serial Data (3.5L "W" Body)
- DTC P1602: EBCM/EBTCM Serial Data Circuit (3.8L "C" & "W" Bodies)
- DTC P1602: Loss Of EBTCM Serial Data (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1603
- DTC P1603: Loss Of SDM Serial Data (4.6L "E" & "K" Bodies)
DTC P1604
- DTC P1604: Loss Of Instrument Panel Cluster (IPC) Serial Data (3.8L "C" Body)
- DTC P1604: Loss Of Instrument Panel Cluster (IPC) Serial Data (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1605
- DTC P1605: HVAC Serial Data Circuit (3.1L "W" Body - Century Only)
- DTC P1605: Loss Of HVAC Serial Data (3.5L "W" Body)
- DTC P1605: HVAC Serial Data Circuit (3.8L "W" Body)
- DTC P1605: Loss Of HVAC Serial Data (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1610
- DTC P1610: Standard Body Module Serial Data Circuit (3.1L "N" & "W" Bodies)
- DTC P1610: Class II Failure With BFC (3.4L "N" Body)
- DTC P1610: Loss Of BCM Serial Data (3.5L "W" Body)
- DTC P1610: Standard Body Module Serial Data Circuit (3.8L "C" & "W" Bodies)
- DTC P1610: Loss Of PZM Serial Data (4.6L "E" & "K" Bodies)
DTC P1611
- DTC P1611: Loss Of CVRTD Serial Data (4.6L "E" & "K" Bodies)
DTC P1612
- DTC P1612: Loss Of IPM Serial Data (4.6L "K" Body - SEVILLE)
DTC P1613
- DTC P1613: Loss Of Dim Serial Data (4.6L "K" Body - SEVILLE)
DTC P1614
- DTC P1614: Loss Of Rim Serial Data (4.6L "K" Body - SEVILLE)
DTC P1615
- DTC P1615: Loss Of VTD Serial Data (4.6L "K" Body - SEVILLE)
DTC P1617
- DTC P1617: Engine Oil Level Switch Circuit (4.0L "G" Body & 4.6L "E" & "K" Bodies)
  - Circuit Description
  - Diagnostic Procedures
DTC P1619
- DTC P1619: Engine Oil Life Monitor Reset Circuit (3.8L "H" Body)
DTC P1620
- DTC P1620: Low Coolant Level Circuit (1.9L SATURN)
DTC P1621
- DTC P1621: Pcm Memory Error (1.9L SATURN)
  - Circuit Description
  - Diagnostic Procedures
- DTC P1621: Pcm Memory Performance (2.2L "J" Body, 2.2L "S" Series & 2.4L "J" & "N" Bodies)
  - Circuit Description
  - Diagnostic Procedures
- DTC P1621: Control Module Long Term Memory Performance (4.0L "G" Body & 4.6L "E" & "K" Bodies)
  - Circuit Description
  - Diagnostic Procedures
- DTC P1621: VCM EEPROM Performance (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1621: VCM EEPROM Performance (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
DTC P1623
- DTC P1623: Transaxle Temperature Pull-Up Resistor Malfunction (1.9L SATURN)
  - Circuit Description
  - Diagnostic Procedures
DTC P1624
- DTC P1624: Customer Snap Shot Function (1.9L SATURN)
  - Circuit Description
DTC P1625
- DTC P1625: Pcm Checksum/Flash Fault (1.9L SATURN)
  - Circuit Description
  - Diagnostic Procedures
DTC P1626
- DTC P1626: Loss Of Serial Communication With Vehicle Theft Deterrent Or Theft Deterrent System Fuel Enable Circuit (2.2L "S" Series & 2.4L "J" & "N" Bodies)
- DTC P1626: Theft Deterrent System Fuel Enable Circuit (3.1L "N" Body)
- DTC P1626: Theft Deterrent System Fuel Enable Circuit (3.1L "W" Body)
- DTC P1626: Theft Deterrent System Fuel Enable Circuit (3.4L "N" Body)
- DTC P1626: Theft Deterrent System Fuel Enable Circuit (3.4L "U" Series)
- DTC P1626: Loss Of Serial Communication With Vehicle Theft Deterrent System (3.5L "W" Body)
- DTC P1626: Theft Deterrent System Fuel Enable Circuit (3.8L "C", "F", "G", "H" & "W" Bodies)
- DTC P1626: Theft Deterrent System Fuel Enable Circuit (4.0L "G" Body)
- DTC P1626: Loss Of Serial Communication With VTD (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1626: Theft Deterrent System Fuel Signal Lost (4.6L "E" & "K" Bodies)
- DTC P1626: Theft Deterrent System Fuel Enable Circuit (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1626: Theft Deterrent Fuel Enable Signal Not Received (5.0L & 5.7L "C" & "K" Series)
- DTC P1626: Theft Deterrent System Fuel Enable Circuit (5.7L "F" Body)
- DTC P1626: Theft Deterrent System Fuel Enable Circuit (5.7L "Y" Body)
DTC P1627
- DTC P1627: A/D Malfunction (1.9L SATURN)
  - Circuit Description
  - Diagnostic Procedures
DTC P1628
- DTC P1628: ECT Pull-Up Resistor (1.9L SATURN)
  - Circuit Description
  - Diagnostic Procedures
DTC P1629
- DTC P1629: Theft Deterrent Crank Signal Malfunction (2.2L & 2.4L "J" Body)
- DTC P1629: Theft Deterrent System Cranking Signal Malfunction (3.4L "U" Series)
- DTC P1629: Theft Deterrent Crank Signal Malfunction (3.8L "F", "G" & "H" Bodies)
DTC P1630
- DTC P1630: Theft Deterrent System Pcm In Learn Mode (2.4L "N" Body)
- DTC P1630: Theft Deterrent System Pcm In Learn Mode (3.1L "N" Body)
- DTC P1630: Theft Deterrent System Pcm In Learn Mode (3.1L "W" Body)
- DTC P1630: Theft Deterrent Pcm In Learn Mode (3.4L "N" Body)
- DTC P1630: Theft Deterrent System Pcm In Learn Mode (3.5L "W" Body)
- DTC P1630: Theft Deterrent System Pcm In Learn Mode (3.8L "C" & "W" Bodies)
- DTC P1630: Theft Deterrent Learn Mode Active (4.6L "E" & "K" Bodies)
- DTC P1630: Theft Deterrent System VCM In Learn Mode (5.0L & 5.7L "C" & "K" Series)
- DTC P1630: Theft Deterrent System Pcm In Learn Mode (5.7L "Y" Body)
DTC P1631
- DTC P1631: Theft Deterrent System Password Incorrect (2.2L "S" Series & 2.4L "N" Body)
- DTC P1631: Theft Deterrent System Password Incorrect (3.1L "N" Body)
- DTC P1631: Theft Deterrent System Password Incorrect (3.1L "W" Body)
- DTC P1631: Theft Deterrent System Password Incorrect (3.4L "N" Body)
- DTC P1631: Theft Deterrent System Password Incorrect (3.5L "W" Body)
- DTC P1631: Theft Deterrent System Password Incorrect (3.8L "C" & "W" Bodies)
- DTC P1631: Theft Deterrent System Password Incorrect (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1631: Theft Deterrent Start Enable Signal Not Correct (4.6L "E" & "K" Bodies)
- DTC P1631: Theft Deterrent System Password Incorrect (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1631: Theft Deterrent System Password Incorrect (5.0L & 5.7L "C" & "K" Series)
- DTC P1631: Theft Deterrent System Password Incorrect (5.7L "Y" Body)
DTC P1632
- DTC P1632: Theft Deterrent System Fuel Disabled (2.2L "S" Series & 2.4L "N" Body)
- DTC P1632: Theft Deterrent Fuel Disable Signal Received (4.6L "E" & "K" Bodies)
DTC P1633
- DTC P1633: Ignition 0 Switch Circuit (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1634
- DTC P1634: Ignition 1 Switch Circuit (4.0L "G" Body)
- DTC P1634: Ignition 1 Switch Circuit (4.6L "E" & "K" Bodies)
DTC P1635
- DTC P1635: 5-Volt Reference Error (1.9L SATURN)
- DTC P1635: 5-Volt Reference "A" Circuit (3.1L "N" & "W" Bodies & 3.4L "N" Body & "U" Series)
- DTC P1635: 5-Volt Reference "A" Circuit (3.5L "W" Body)
- DTC P1635: 5-Volt Reference "A" Circuit (3.8L "C", "F", "G", "H" & "W" Bodies)
- DTC P1635: 5-Volt Reference No. 1 Circuit (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1635: 5-Volt Reference No. 1 Circuit (5.7L "F" Body)
- DTC P1635: 5-Volt Reference No. 1 Circuit (5.7L "Y" Body)
DTC P1637
- DTC P1637: Generator Light Circuit Fault (3.4L "U" Series)
- DTC P1637: Generator "L" Terminal Circuit (4.0L "G" Body & 4.6L "K" Body - SEVILLE)
- DTC P1637: Generator "L" Terminal Circuit (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1637: Generator "L" Terminal Circuit (5.7L "F" Body)
- DTC P1637: Generator "L" Terminal Circuit (5.7L "Y" Body)
DTC P1638
- DTC P1638: Generator "F" Terminal Circuit (4.0L "G" Body & 4.6L "K" Body - SEVILLE)
- DTC P1638: Generator "F" Terminal Circuit (5.7L "Y" Body)
DTC P1639
- DTC P1639: TCM A/D Failure (1.9L SATURN)
  - Circuit Description
  - Diagnostic Procedures
- DTC P1639: 5-Volt Reference "B" Circuit (3.1L "N" & "W" Bodies & 3.4L "N" Body & "U" Series)
- DTC P1639: 5-Volt Reference "B" Circuit (3.5L "W" Body)
- DTC P1639: 5-Volt Reference "B" Circuit (3.8L "C", "G", "H" & "W" Bodies)
- DTC P1639: 5-Volt Reference "B" Circuit (3.8L "F" Body)
- DTC P1639: 5-Volt Reference No. 2 Circuit (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1639: 5-Volt Reference No. 2 Circuit (5.7L "F" Body)
- DTC P1639: 5-Volt Reference No. 2 Circuit (5.7L "Y" Body)
DTC P1640
- DTC P1640 &/Or P1641: Pcm Output Controls Fault-QDM "A" Output Faults (1.9L SATURN)
- DTC P1640: Driver 1-Input Voltage High (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1641
- DTC P1641: A/C Relay Control Circuit (3.1L "N" Body & 3.4L "U" Series)
- DTC P1641: A/C Relay Control Circuit (3.1L "W" Body)
- DTC P1641: A/C Relay Control Circuit (3.4L "N" Body)
- DTC P1641: A/C Relay Control Circuit (3.8L "C", "G", "H" & "W" Bodies)
- DTC P1641: Malfunction Indicator Light (Mil) Control Circuit (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1642
- DTC P1642: Vehicle Speed Output Circuit (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1644
- DTC P1644: Delivered Torque Output Circuit (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1645
- DTC P1645: EVAP Purge Solenoid Output Circuit (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1646
- DTC P1646: Boost Control Solenoid Control Circuit (3.8L "C", "G", "H" & "W" Bodies)
- DTC P1646: EVAP Vent Valve Output Circuit (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1650/1651
- DTC P1650 &/Or P1651: Pcm Output Controls Fault - QDM "B" Output Faults (1.9L SATURN)
- DTC P1650: Control Module Output "B" Circuit (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1651
- DTC P1651: Fan 1 Relay Control Circuit (3.1L "N" & "W" Bodies & 3.4L "N" Body)
- DTC P1651: Fan 1 Relay Control Circuit (3.8L "C", "G", "H" & "W" Bodies)
DTC P1652
- DTC P1652: Fan 2 Relay Control Circuit (3.1L "N" & "W" Bodies)
- DTC P1652: Fan 2 Relay Control Circuit (3.4L "N" Body)
- DTC P1652: Fan 2 Relay Control Circuit (3.8L "C", "G", "H" & "W" Bodies)
- DTC P1652: Powertrain Induced Chassis Pitch Output Circuit (4.6L "E" & "K" Bodies)
- DTC P1652: Pcm Chassis Pitch Output Circuit (5.7L "Y" Body)
DTC P1653
- DTC P1653: Low Oil Light Circuit Fault (3.1L "W" Body - Lumina & Monte CARLO & 3.4L "U" Series)
DTC P1654
- DTC P1654: Cruise Disable Output Circuit (4.0L "G" Body & 4.6L "E" & "K" Bodies)
DTC P1660
- DTC P1660: TCM GFD Malfunction (1.9L SATURN)
  - Circuit Description
  - Diagnostic Procedures
- DTC P1660: Cooling Fan Control Circuits (4.0L "G" Body)
- DTC P1660: Cooling Fan Control Circuits (4.6L "E" & "K" Bodies - Except SEVILLE)
- DTC P1660: Cooling Fan Control Circuits (4.6L "K" Body - SEVILLE)
DTC P1662
- DTC P1662: Cruise Control Light Control Circuit (3.0L "V" Body)
- DTC P1662: Cruise Control Inhibit Circuit (3.1L "N" & "W" Bodies & 3.4L "N" Body)
- DTC P1662: Cruise Control Inhibit Circuit (3.8L "C", "G", "H" & "W" Bodies)
DTC P1663
- DTC P1663: Change Oil Light Control Circuit (3.1L "W" Body - Lumina & Monte CARLO)
- DTC P1663: Generator Light Control Circuit (3.8L "G" Body)
DTC P1665
- DTC P1665: EVAP Vent Solenoid Control Circuit (3.1L "N" & "W" Bodies & 3.4L "N" Body)
- DTC P1665: EVAP Vent Solenoid Control Circuit (3.8L "C", "G", "H" & "W" Bodies)
DTC P1667
- DTC P1667: Fuel Pump PWM Control Circuit (3.8L "C", "G", "H" & "W" Bodies)
DTC P1671
- DTC P1671: Mil Control Circuit (3.1L "N" & "W" Bodies & 3.4L "N" Body)
- DTC P1671: Mil Control Circuit (3.8L "C", "G", "H" & "W" Bodies)
DTC P1672
- DTC P1672: Low Oil Level Light Control Circuit (3.8L "G" Body)
DTC P1673
- DTC P1673: Engine Hot Light Control Circuit (3.4L "U" Series)
- DTC P1673: Engine Hot Light Control Circuit (3.8L "G" Body)
DTC P1676
- DTC P1676: EVAP Purge Valve Control Circuit (3.1L "N" & "W" Bodies & 3.4L "N" Body)
DTC P1689
- DTC P1689: Traction Control Delivered Torque Control Circuit (3.8L "F" Body)
- DTC P1689: Delivered Torque Circuit Fault (5.7L "Y" Body)
DTC P1845
- DTC P1845: Torque Limit Management (3.0L "V" Body)
  - Circuit Description
  - Diagnostic Procedures
DTC U1000
- DTC U1000: No Class II Communication-Id Not Learned (2.2L "S" Series & 2.4L "N" Body)
DTC U1016
- DTC U1016: Serial Communications Malfunction (2.2L & 2.4L "J" & "N" Bodies)
DTC U1026
- DTC U1026: Loss Of ATCM Communication (4.3L "S" & "T" Series)
- DTC U1026: Loss Of ATCM Communication (4.3L, 5.0L & 5.7L "C" & "K" Series)
- DTC U1026: Loss Of ATC Class II Communication (6.5L "C" & "K" Series)
DTC U1040
- DTC U1040: Loss Of EBCM/EBTCM Communication (2.4L "N" Body - MALIBU)
DTC U1041
- DTC U1041: Loss Of EBCM Communication (2.2L "S" Series)
- DTC U1041: Loss Of EBCM Communication (4.3L "L", "M", "S" & "T" Series)
- DTC U1041: Loss Of EBCM Communication (4.3L, 5.0L & 5.7L "C", "G", "K" & "P" Series)
DTC U1064
- DTC U1064: Loss Of BCM/TBC/VTD Communication (2.2L "S" Series & 2.4L "N" Body - MALIBU)
- DTC U1064: Loss Of BCM/VTD Communication (4.3L "S" & "T" Series)
- DTC U1064: Loss Of BCM/VTD Communication (4.8L "C" & "K" Series)
DTC U1192
- DTC U1192: Loss Of EVO/VTD PASSLOCK® Communication (4.3L "L" & "M" Series)
- DTC U1192: Loss Of EVO/VTD PASSLOCK® Communication (4.3L, 5.0L & 5.7L "C", "G" & "K" Series)
- DTC U1192: Loss Of EVO/VTD PASSLOCK® Communication (6.5L "C" & "K" Series)
- DTC U1192: Loss Of EVO/PASSLOCK® Communication (6.5L "G" Series)
DTC U1193
- DTC U1193: Loss Of Vim Communication (4.3L, 5.0L & 5.7L "C", "G" & "K" Series)
DTC U1301
- DTC U1301: Class 2 Communication Circuit - High Voltage (4.8L "C" & "K" Series)