OBD-II · CODE FAMILY
Codes P16xx — what they mean
P16xx is a family of 99 manufacturer-specific OBD2 codes covering powertrain and electrical faults. Each P16xx code below links to its own page with causes, diagnosis and the parts to fix it.
99 codesPowertrain systems
FAMILY
RangeP1600–P1699
Codes99
TROUBLEATLAS APP
01All codes in this family
One rich, indexed page — not thousands of empty ones. Each code links to its own page.
| Code | Meaning — click to open the code page | System | Severity |
|---|---|---|---|
| P1600 | PCM Battery → /auto/codes/p1600/ PCM Battery | Powertrain | Medium |
| P1601 | Serial Communication Problem With Devise 1 → /auto/codes/p1601/ Serial Communication Problem With Devise 1 | Powertrain | Medium |
| P1602 | Control Module Self Test Control Module Defective → /auto/codes/p1602/ Control Module Self Test Control Module Defective | Powertrain | Medium |
| P1603 | Control Module Self Test Torque Monitoring → /auto/codes/p1603/ Control Module Self Test Torque Monitoring | Powertrain | Medium |
| P1604 | Control Module Self Test Speed Monitoring → /auto/codes/p1604/ Control Module Self Test Speed Monitoring | Powertrain | Medium |
| P1605 | Loss OF HVAX Serial Data → /auto/codes/p1605/ Loss OF HVAX Serial Data | Powertrain | Medium |
| P1606 | Serial Communication Problem With Device 6 → /auto/codes/p1606/ Serial Communication Problem With Device 6 | Powertrain | Medium |
| P1607 | ECM Internal Circuit Failure A → /auto/codes/p1607/ ECM Internal Circuit Failure A | Powertrain | Medium |
| P1608 | ECM Internal Circuit Failure B → /auto/codes/p1608/ ECM Internal Circuit Failure B | Powertrain | Medium |
| P1609 | Serial Communicating Link EML → /auto/codes/p1609/ Serial Communicating Link EML | Powertrain | Medium |
| P1610 | Loss Of PZM Serial Data → /auto/codes/p1610/ Loss Of PZM Serial Data | Powertrain | Medium |
| P1611 | Serial Communicating Link Transmission Control Module → /auto/codes/p1611/ Serial Communicating Link Transmission Control Module | Powertrain | Medium |
| P1612 | Loss OF IPM Serial Data → /auto/codes/p1612/ Loss OF IPM Serial Data | Powertrain | Medium |
| P1613 | Loss Of DIM Serial Data → /auto/codes/p1613/ Loss Of DIM Serial Data | Powertrain | Medium |
| P1614 | Loss Of RIM Serial Data → /auto/codes/p1614/ Loss Of RIM Serial Data | Powertrain | Medium |
| P1615 | Loss Of VTD Serial Data → /auto/codes/p1615/ Loss Of VTD Serial Data | Powertrain | Medium |
| P1616 | Chassis Accelerator Sensor Signal Low Voltage → /auto/codes/p1616/ Chassis Accelerator Sensor Signal Low Voltage | Powertrain | Medium |
| P1617 | Engine Oil Level Switch Circuit → /auto/codes/p1617/ Engine Oil Level Switch Circuit | Powertrain | Medium |
| P1618 | SBDS Interactive Codes → /auto/codes/p1618/ SBDS Interactive Codes | Powertrain | Medium |
| P1619 | MAP Cooling Control Circuit Signal Low → /auto/codes/p1619/ MAP Cooling Control Circuit Signal Low | Powertrain | Medium |
| P1620 | MAP Cooling Control Circuit Signal High → /auto/codes/p1620/ MAP Cooling Control Circuit Signal High | Powertrain | Medium |
| P1621 | PCM Memory Performance → /auto/codes/p1621/ PCM Memory Performance | Powertrain | Medium |
| P1622 | MAP Cooling Control Circuit Electrical → /auto/codes/p1622/ MAP Cooling Control Circuit Electrical | Powertrain | Medium |
| P1623 | Pedal Position Sensor Potentiometer Supply → /auto/codes/p1623/ Pedal Position Sensor Potentiometer Supply | Powertrain | Medium |
| P1624 | Pedal Position Sensor Potentiometer Supply Channel 1 Electri → /auto/codes/p1624/ Pedal Position Sensor Potentiometer Supply Channel 1 Electrical | Powertrain | Medium |
| P1625 | Pedal Position Sensor Potentiometer Supply Channel 2 Electri → /auto/codes/p1625/ Pedal Position Sensor Potentiometer Supply Channel 2 Electrical | Powertrain | Medium |
| P1626 | Theft Deterrent Fuel Enable Signal Lost → /auto/codes/p1626/ Theft Deterrent Fuel Enable Signal Lost | Powertrain | Medium |
| P1627 | A/D Performance → /auto/codes/p1627/ A/D Performance | Powertrain | Medium |
| P1628 | ECT Pull-Up Resistor → /auto/codes/p1628/ ECT Pull-Up Resistor | Powertrain | Medium |
| P1629 | Theft Deterrent System Cranking Signal → /auto/codes/p1629/ Theft Deterrent System Cranking Signal | Powertrain | Medium |
| P1630 | Theft Deterrent Learn Mode Active → /auto/codes/p1630/ Theft Deterrent Learn Mode Active | Powertrain | Medium |
| P1631 | Theft Deterrent Start Enable Signal Not Correct → /auto/codes/p1631/ Theft Deterrent Start Enable Signal Not Correct | Powertrain | Medium |
| P1632 | Throttle Valve Adaptation Adaptation Condition Not Met → /auto/codes/p1632/ Throttle Valve Adaptation Adaptation Condition Not Met | Powertrain | Medium |
| P1633 | Throttle Valve Adaptation Limp Home Position → /auto/codes/p1633/ Throttle Valve Adaptation Limp Home Position | Powertrain | Medium |
| P1634 | Throttle Valve Adaptation Spring Test Failed → /auto/codes/p1634/ Throttle Valve Adaptation Spring Test Failed | Powertrain | Medium |
| P1635 | Throttle Valve Adaptation Lower Mechanical Stop Not Adapted → /auto/codes/p1635/ Throttle Valve Adaptation Lower Mechanical Stop Not Adapted | Powertrain | Medium |
| P1636 | Throttle Valve Control Circuit → /auto/codes/p1636/ Throttle Valve Control Circuit | Powertrain | Medium |
| P1637 | Throttle Valve Position Control Control Deviation → /auto/codes/p1637/ Throttle Valve Position Control Control Deviation | Powertrain | Medium |
| P1638 | Throttle Valve Position Control Throttle Stuck Temporarily → /auto/codes/p1638/ Throttle Valve Position Control Throttle Stuck Temporarily | Powertrain | Medium |
| P1639 | Throttle Valve Position Control Throttle Stuck Permanently → /auto/codes/p1639/ Throttle Valve Position Control Throttle Stuck Permanently | Powertrain | Medium |
| P1640 | Internal Control Module ROM RAM Error → /auto/codes/p1640/ Internal Control Module ROM RAM Error | Powertrain | Medium |
| P1641 | FC Relay 1 Control Circuit → /auto/codes/p1641/ FC Relay 1 Control Circuit | Powertrain | Medium |
| P1642 | FC Relay 2 And 3 Control Circuit → /auto/codes/p1642/ FC Relay 2 And 3 Control Circuit | Powertrain | Medium |
| P1643 | Engine Speed Output Circuit → /auto/codes/p1643/ Engine Speed Output Circuit | Powertrain | Medium |
| P1644 | TP Output Circuit → /auto/codes/p1644/ TP Output Circuit | Powertrain | Medium |
| P1645 | EVAP Solenoid Output Circuit → /auto/codes/p1645/ EVAP Solenoid Output Circuit | Powertrain | Medium |
| P1646 | Driver 1 Line 6 → /auto/codes/p1646/ Driver 1 Line 6 | Powertrain | Medium |
| P1647 | Driver 1 Line 7 → /auto/codes/p1647/ Driver 1 Line 7 | Powertrain | Medium |
| P1648 | Knock Sensor Input Chip → /auto/codes/p1648/ Knock Sensor Input Chip | Powertrain | Medium |
| P1649 | Fuel Injection Pump Module → /auto/codes/p1649/ Fuel Injection Pump Module | Powertrain | Medium |
| P1650 | Driver 2 Input High Voltage → /auto/codes/p1650/ Driver 2 Input High Voltage | Powertrain | Medium |
| P1651 | Fan 1 Relay Control Circuit → /auto/codes/p1651/ Fan 1 Relay Control Circuit | Powertrain | Medium |
| P1652 | Powertrain Induced Chassis Pitch Output Circuit → /auto/codes/p1652/ Powertrain Induced Chassis Pitch Output Circuit | Powertrain | Medium |
| P1653 | Oil Level Lamp Control Circuit → /auto/codes/p1653/ Oil Level Lamp Control Circuit | Powertrain | Medium |
| P1654 | Service Throttle Soon Lamp Control Circuit → /auto/codes/p1654/ Service Throttle Soon Lamp Control Circuit | Powertrain | Medium |
| P1655 | TMA Or TMB Signal Line Fault → /auto/codes/p1655/ TMA Or TMB Signal Line Fault | Powertrain | Medium |
| P1656 | Automatic Transmission System Malfunction → /auto/codes/p1656/ Automatic Transmission System Malfunction | Powertrain | Medium |
| P1657 | 1-4 Upshift Solenoid Control Circuit → /auto/codes/p1657/ 1-4 Upshift Solenoid Control Circuit | Powertrain | Medium |
| P1658 | Starter Enable Relay Control Circuit → /auto/codes/p1658/ Starter Enable Relay Control Circuit | Powertrain | Medium |
| P1660 | A/T FI Data Line Failure → /auto/codes/p1660/ A/T FI Data Line Failure | Powertrain | Medium |
| P1661 | MIL Control Circuit → /auto/codes/p1661/ MIL Control Circuit | Powertrain | Medium |
| P1662 | Cruise Control Inhibit Control Circuit → /auto/codes/p1662/ Cruise Control Inhibit Control Circuit | Powertrain | Medium |
| P1663 | Oil Life Lamp Control Circuit → /auto/codes/p1663/ Oil Life Lamp Control Circuit | Powertrain | Medium |
| P1664 | 1-4 Upshift Lamp Control Circuit → /auto/codes/p1664/ 1-4 Upshift Lamp Control Circuit | Powertrain | Medium |
| P1665 | Driver 3 Line 5 → /auto/codes/p1665/ Driver 3 Line 5 | Powertrain | Medium |
| P1666 | Driver 3 Line 6 → /auto/codes/p1666/ Driver 3 Line 6 | Powertrain | Medium |
| P1667 | Reverse Inhibit Solenoid Control Circuit → /auto/codes/p1667/ Reverse Inhibit Solenoid Control Circuit | Powertrain | Medium |
| P1668 | PCM IDM Communications Error → /auto/codes/p1668/ PCM IDM Communications Error | Powertrain | Medium |
| P1669 | ABS Unit Expected → /auto/codes/p1669/ ABS Unit Expected | Powertrain | Medium |
| P1670 | Driver 4 → /auto/codes/p1670/ Driver 4 | Powertrain | Medium |
| P1671 | A/T FI Data Line No Signal → /auto/codes/p1671/ A/T FI Data Line No Signal | Powertrain | Medium |
| P1672 | A/T FI Data Line Failure → /auto/codes/p1672/ A/T FI Data Line Failure | Powertrain | Medium |
| P1673 | Engine Hot Lamp Control Circuit → /auto/codes/p1673/ Engine Hot Lamp Control Circuit | Powertrain | Medium |
| P1674 | Tachometer Control Circuit → /auto/codes/p1674/ Tachometer Control Circuit | Powertrain | Medium |
| P1675 | EVAP Vent Solenoid Control Circuit → /auto/codes/p1675/ EVAP Vent Solenoid Control Circuit | Powertrain | Medium |
| P1676 | Traction Control System FI Data Line No Signal → /auto/codes/p1676/ Traction Control System FI Data Line No Signal | Powertrain | Medium |
| P1677 | Traction Control System FI Data Line Failure → /auto/codes/p1677/ Traction Control System FI Data Line Failure | Powertrain | Medium |
| P1678 | FPTDR Signal Line Failure → /auto/codes/p1678/ FPTDR Signal Line Failure | Powertrain | Medium |
| P1679 | Drive By Wire MIL Circuit Open Circuit → /auto/codes/p1679/ Drive By Wire MIL Circuit Open Circuit | Powertrain | Medium |
| P1680 | Driver 5 → /auto/codes/p1680/ Driver 5 | Powertrain | Medium |
| P1681 | A/T FI Signal A Low Input → /auto/codes/p1681/ A/T FI Signal A Low Input | Powertrain | Medium |
| P1682 | A/T FI Signal A High Input → /auto/codes/p1682/ A/T FI Signal A High Input | Powertrain | Medium |
| P1683 | Driver 5 Line 3 → /auto/codes/p1683/ Driver 5 Line 3 | Powertrain | Medium |
| P1684 | Some trouble codes are considered generic and the meaning is → /auto/codes/p1684/ Some trouble codes are considered generic and the meaning is the same for most types of vehicles. Other codes can be specific to the manufacturer, suc | Powertrain | Medium |
| P1685 | Driver 5 Line 5 → /auto/codes/p1685/ Driver 5 Line 5 | Powertrain | Medium |
| P1686 | A/T FI Signal B Low Input → /auto/codes/p1686/ A/T FI Signal B Low Input | Powertrain | Medium |
| P1687 | A/T FI Signal B High Input → /auto/codes/p1687/ A/T FI Signal B High Input | Powertrain | Medium |
| P1688 | Internal Fuel Injection Pump Controller Failure → /auto/codes/p1688/ Internal Fuel Injection Pump Controller Failure | Powertrain | Medium |
| P1689 | Delivered Torque Circuit Fault → /auto/codes/p1689/ Delivered Torque Circuit Fault | Powertrain | Medium |
| P1690 | Traction Control System STB Line Failure → /auto/codes/p1690/ Traction Control System STB Line Failure | Powertrain | Medium |
| P1691 | Coolant Gage Circuit Low Voltage → /auto/codes/p1691/ Coolant Gage Circuit Low Voltage | Powertrain | Medium |
| P1692 | Coolant Gage Circuit High Voltage → /auto/codes/p1692/ Coolant Gage Circuit High Voltage | Powertrain | Medium |
| P1693 | Tachometer Circuit Low Voltage → /auto/codes/p1693/ Tachometer Circuit Low Voltage | Powertrain | Medium |
| P1694 | Tachometer Circuit High Voltag → /auto/codes/p1694/ Tachometer Circuit High Voltag | Powertrain | Medium |
| P1695 | Remote Keyless Entry Circuit Low → /auto/codes/p1695/ Remote Keyless Entry Circuit Low | Powertrain | Medium |
| P1696 | Traction Control Fuel Cut Signal Low Input → /auto/codes/p1696/ Traction Control Fuel Cut Signal Low Input | Powertrain | Medium |
| P1697 | Traction Control Fuel Cut Signal High Input → /auto/codes/p1697/ Traction Control Fuel Cut Signal High Input | Powertrain | Medium |
| P1698 | No CCD Messages Received From PCM → /auto/codes/p1698/ No CCD Messages Received From PCM | Powertrain | Medium |
| P1699 | No CCD J1850 Messages Received From The Climate Control Modu → /auto/codes/p1699/ No CCD J1850 Messages Received From The Climate Control Module (CCM) | Powertrain | Medium |
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