B1500 Lamp turn signal left circuit open
B1501 Lamp turn signal left circuit short to battery
B1502 Lamp turn signal left circuit short to ground
B1503 Lamp turn signal right circuit failure
B1504 Lamp turn signal right circuit open
B1505 Lamp turn signal right circuit short to battery
B1506 Lamp turn signal right circuit short to ground
B1507 Flash to pass switch circuit failure
B1508 Flash to pass switch circuit open
B1509 Flash to pass switch circuit short to battery
B1510 Flash to pass switch circuit short to ground
B1511 Driver door handle circuit failure
B1512 Driver door handle circuit open
B1513 Driver door handle circuit short to battery
B1514 Driver door handle circuit short to ground
B1515 Driver seat occupied switch circuit failure
B1516 Driver seat occupied switch circuit open
B1517 Driver seat occupied switch circuit short to battery
B1518 Driver seat occupied switch circuit short to ground
B1519 Hood switch circuit failure
B1520 Hood switch circuit open
B1521 Hood switch circuit short to battery
B1522 Hood switch circuit short to ground
B1523 Keyless entry circuit failure
B1524 Keyless entry circuit open
B1525 Keyless entry circuit short to battery
B1526 Keyless entry circuit short to ground
B1527 Memory set switch circuit failure
B1528 Memory set switch circuit open
B1529 Memory set switch circuit short to battery
B1530 Memory set switch circuit short to ground
B1531 Memory 1 switch circuit failure
B1532 Memory 1 switch circuit open
B1533 Memory 1 switch circuit short to battery
B1534 Memory 1 switch circuit short to ground
B1535 Memory 2 switch circuit failure
B1536 Memory 2 switch circuit open
B1537 Memory 2 switch circuit short to battery
B1538 Memory 2 switch circuit short to ground
B1539 Mirror driver switch assembly circuit failure
B1540 Mirror driver switch assembly circuit open
B1541 Mirror driver switch assembly circuit short to battery
B1542 Mirror driver switch assembly circuit short to ground
B1543 Seat direction switch assembly circuit failure
B1544 Seat direction switch assembly circuit open
B1545 Seat direction switch assembly circuit short to battery
B1546 Seat direction switch assembly circuit short to ground
B1547 Power window master circuit failure
B1548 Power window master circuit open
B1549 Power window master circuit short to battery
B1550 Power window master circuit short to ground
B1551 Decklid release circuit failure
B1552 Decklid release circuit open
B1553 Decklid release circuit short to battery
B1554 Decklid release circuit short to ground
B1555 Ignition run/start circuit failure
B1556 Ignition run/start circuit open
B1557 Ignition run/start circuit short to battery
B1558 Ignition run/start circuit short to ground
B1559 Door lock cylinder circuit failure
B1560 Door lock cylinder circuit open
B1561 Door lock cylinder circuit short to battery
B1562 Door lock cylinder circuit short to ground
B1563 Door ajar circuit failure
B1564 Door ajar circuit open
B1565 Door ajar circuit short to battery
B1566 Door ajar circuit short to ground
B1567 Lamp headlamp high-beam circuit failure
B1568 Lamp headlamp high-beam circuit open
B1569 Lamp headlamp high-beam circuit short to battery
B1570 Lamp headlamp high-beam circuit short to ground
B1571 Door ajar LR circuit failure
B1572 Door ajar LR circuit open
B1573 Door ajar LR circuit short to battery
B1574 Door ajar LR circuit short to ground
B1575 Lamp park input circuit failure
B1576 Lamp park input circuit open
B1577 Lamp park input circuit short to battery
B1578 Lamp park input circuit short to ground
B1579 Dim panel increase input circuit failure
B1580 Dim panel increase input circuit open
B1581 Dim panel increase input circuit short to battery
B1582 Dim panel increase input circuit short to ground
B1583 Dim panel decrease input circuit failure
B1584 Dim panel decrease input circuit open
B1585 Dim panel decrease input circuit short to battery
B1586 Dim panel decrease input circuit short to ground
B1587 Autolamp delay increase circuit failure
B1588 Autolamp delay increase circuit open
B1589 Autolamp delay increase circuit short to battery
B1590 Autolamp delay increase circuit short to ground
B1591 Autolamp delay decrease circuit failure
B1592 Autolamp delay decrease circuit open
B1593 Autolamp delay decrease circuit short to battery
B1594 Autolamp delay decrease circuit short to ground
B1595 Ignition switch illegal input code
B1596 Service continuous codes
B1597 Driver’s seat seatback autoglide forward switch circuit short to ground
B1598 Driver’s seat seatback autoglide rearward switch circuit short to ground
B1599 Passenger’s seat seatback autoglide forward switch circuit short to ground

Throttle/Pedal Position Sensor/Switch “A” Circuit Low Input

Our emissions expert has put together the following information about the P0122 fault code. We have also included diagnostic procedures you can take to your repair shop if the mechanic is having difficulty analyzing the code.

OBD II Fault Code

OBD II P0122

Fault Code Definition
Code P0122 is triggered when the voltage output from the Throttle/Pedal Position Sensor/Switch to the PCM is too low.

The Throttle Position Sensor/Switch is located on the Throttle Body of the Intake Manifold and the Pedal Position Sensor/Switch is located on the Accelerator Pedal. These sensors provide precise input from the driver’s foot in terms of how much power is needed—and how urgently—from the engine.

As the Throttle Position Sensor is rotated from its base resting position to full acceleration, it sends a increasing voltage signal to the Powertrain Control Module (PCM). This decreasing or increasing voltage signal is used by the PCM to manage the Air Fuel Ratio and Spark Timing of the engine as well as other emissions system components.

Symptoms

Check Engine Light will illuminate
In many cases, no abnormal symptoms may be noticed
In some cases, the engine may be hard starting
In some cases, the engine may hesitate during acceleration
Common Problems That Trigger the P0122 Code

Defective Throttle Position Sensor or Switch
Torn or jammed floor mats
Faulty or corroded Throttle/Pedal Position Sensor/Switch wiring or connections
Common Misdiagnoses

Throttle or Pedal Position Sensor is replaced when the real problem is a poor connection or chafed wiring
Pedal Position Sensor is replaced when the real problem is torn or damaged floor mats

Possible Solutions

Some recommended troubleshooting and repair steps are:

Carefully check the throttle position sensor (TPS), wiring connector, and wiring for breaks, etc. Repair or replace as necessary
Check the voltage at the TPS (refer to a service manual for your vehicle for specific information). If the voltage is too low that is indicative of a problem. Replace if necessary.
If recently replaced the TPS may need to be adjusted. On some vehicles the installation instructions call for the TPS to be properly aligned or adjusted, consult a repair manual for specifics.
If there are no symptoms at all, the problem may be intermittent and clearing the code may resolve the issue temporarily. If this is the case then you should definitely check the wiring to be sure it’s not rubbing on anything, grounding, etc. The code may come back.
Other TPS sensor and circuit related DTCs: P0120, P0121, P0123, P0124

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