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It is the intake air temp is low. The sensor that is in the air intake before the throttle body is probably disconnected.

The "0" in p0112 is generic. See Mazda specific codes below--look at P1112. Locate the sensor by facing engine and find a black box in front of you. The sensor is to the right of the black box and it's the second connector.

P1000 OBD II Monitor Testing Not Completed

P1001 Unable to Achieve Self-Test Function or SCP Error

P1100 Mass Airflow Sensor Circuit Intermittent

P1101 Mass Airflow Sensor Circuit out of Self-Test Range

P1102 Mass Airflow Sensor Signal Inconsistent with Throttle Position Sensor

P1103 Mass Airflow Sensor Signal Inconsistent with Engine Speed

P1110 Intake Air Temperature Sensor Signal (Dynamic Chamber) Circuit

P1112 Intake Air Temperature Sensor Circuit Intermittent

P1113 Intake Air Temperature Sensor Signal (Dynamic Chamber) Circuit

P1114 Intake Air Temperature Sensor Circuit Low Input

P1116 ECT Sensor Circuit Out of Self Test Range

P1117 ECT Sensor Signal Intermittent

P1120 Throttle Position Sensor out of Range Low

P1121 Throttle Position Sensor Signal Not Consistent with Mass Airflow Signal

P1122 Throttle Position Stuck Closed

P1123 Throttle Position Stuck Open

P1124 Throttle Position Sensor Signal Out of Self Test Range

P1125 Throttle Position Sensor Signal Intermittent

P1127 HO2S Bank 1 Sensor 2 Heater Not On During Key On Engine Running Self Test

P1128 HO2S Bank 1 Sensor 1 Signals Swapped in Key On Engine Running Self Test

P1130 HO2S Bank 1 Sensor 1 Not Switching (Fuel Control Limit Reached)

P1131 HO2S Bank 1 Sensor 1 Signal Below 0.45v (A/F Ratio Too Lean)

P1132 HO2S Bank 1 Sensor 1 Signal Above 0.45v (A/F Ratio Too Rich)

P1135 HO2S Bank 1 Sensor 1 Heater Circuit Low Input

P1136 HO2S Bank 1 Sensor 1 Heater Circuit High Input

P1137 HO2S Bank 1 Sensor 2 Not Switching (Fuel Control Limit Reached)

P1138 HO2S Bank 1 Sensor 2 Signal Above 0.45v (A/F Ratio Too Rich)

P1141 HO2S Bank 1 Sensor 2 Heater Circuit Low Input

P1142 HO2S Bank 1 Sensor 2 Heater Circuit High Input

P1143 HO2S Bank 1 Sensor 3 Signal Below 0.45v (A/F Ratio Too Lean)

P1144 HO2S Bank 1 Sensor 3 Signal Above 0.45v (A/F Ratio Too Rich)

P1150 HO2S Bank 2 Sensor 1 Not Switching (Fuel Control Limit Reached)

P1151 HO2S Bank 2 Sensor 1 Signal Below 0.45v (A/F Ratio Too Lean)

P1152 HO2S Bank 2 Sensor 1 Signal Above 0.45v (A/F Ratio Too Rich)

P1169 HO2S Bank 1 Sensor 1 Circuit Fixed (Bank 1 Sensor 1)

P1170 HO2S Bank 1 Sensor 1 Circuit Fixed (Bank 1 Sensor 1)

P1173 HO2S Bank 2 Sensor 1 Circuit Fixed (Bank 2 Sensor 1)

P1195 EGR Boost Sensor Circuit

P1196 Ignition Switch Start Circuit

P1235 Fuel Pump Control Circuit

P1236 Fuel Pump Control Out Range

P1250 Pressure Regulator Control Solenoid Circuit

P1252 Pressure Regulator Control Solenoid '2' Circuit

P1260 Anti-Theft System Signal Detected - Engine Disabled

P1270 Engine RPM or Vehicle Speed Limit Reached

P1309 Misfire Detection Monitor

P1345 No CMP or SGC Signal

P1351 Ignition Diagnostic Monitor Signal Lost to PCM or Out Of Range

P1352 Ignition Coil 'A' Primary Circuit

P1353 Ignition Coil 'B' Primary Circuit

P1354 Ignition Coil 'C' Primary Circuit

P1358 Ignition Diagnostic Monitor Signal Out Of Self Test Range

P1359 SPOUT Signal Lost To Powertrain Control Module Or Out Of Range

P1360 Ignition Coil 'A' Secondary Circuit

P1361 Ignition Coil 'B' Secondary Circuit

P1362 Ignition Coil 'C' Secondary Circuit

P1364 Ignition Coil Primary Circuit

P1365 Ignition Coil Secondary Circuit

P1390 Octane Adjust Shorting Bar Out or Circuit Open

P1400 DPFE Sensor Circuit Low Input

P1401 DPFE Sensor Circuit High Input

P1402 EGR Valve Position Sensor Circuit

P1405 DPFE Sensor Upstream Hose Off Or Plugged

P1406 DPFE Sensor Downstream Hose Off or Plugged

P1407 No EGR Flow Detected

P1408 EGR System Flow Out of Key On Engine Running Self Test Range

P1409 EGR Vacuum Regulator Solenoid Circuit

P1410 EGR Boost Solenoid Valve Stuck

P1443 EVAP System Purge Flow Fault

P1444 EVAP Purge Flow Sensor Circuit Low Voltage

P1446 EVAP Purge Flow Sensor Circuit High Voltage

P1449 CDCV or Throttle PositionCV Circuit

P1450 EVAP Control System Fault

P1451 Canister Vent Solenoid Circuit

P1455 Fuel Tank Level Sensor Circuit

P1460 Wide Open Throttle A/C Cut-Off Relay Circuit

P1464 Air Conditioning Control Signal Circuit

P1474 Fan Control (Primary Winding) Circuit

P1479 Fan Control (Condenser Primary) Circuit

P1485 EGR Vacuum Solenoid Circuit

P1486 EGR Vent Solenoid Circuit

P1487 EGR-CHK (Boost) Solenoid Circuit

P1496 EGR Valve Motor Coil '1' Open or Shorted

P1497 EGR Valve Motor Coil '2' Open or Shorted

P1498 EGR Valve Motor Coil '3 Open or Shorted

P1499 EGR Valve Motor Coil '4' Open or Shorted

P1500 Vehicle Speed Sensor Intermittent Signal

P1501 Vehicle Speed Sensor Out of Self Test Range

P1502 Vehicle Speed Sensor Circuit Error

P1504 Idle Air Control Solenoid Circuit Intermittent

P1505 Idle Air Control System at Adaptive Clip

P1506 Idle Air Control System Overspeed Detected

P1507 Idle Air Control System Underspeed Detected

P1508 Bypass Air Solenoid '1' Circuit

P1509 Bypass Air Solenoid '2 Circuit

P1512 VTCS Fault

P1521 VRIS Solenoid '1' Circuit

P1522 VRIS Solenoid '2 Circuit

P1523 VICS Solenoid Circuit

P1524 Charge Air Cooler Bypass Solenoid Circuit

P1525 ABV Vacuum Solenoid Circuit

P1526 ABV Vent Solenoid Circuit

P1529 L/C Atmospheric Balance Air Control Valve Circuit

P1540 ABV System Fault

P1562 Powertrain Control Module +BB Voltage Low

P1569 VTCS Circuit Low Input

P1570 VTCS Circuit High Input

P1601 Powertrain Control Module Communication Line to TCM Error

P1602 Powertrain Control Module Communication Line to TCM Error

P1602 Immobilizer System Communication Error with Powertrain Control Module

P1603 Immobilizer System Fault

P1604 Immobilizer System Fault

P1605 Powertrain Control Module Keep Alive Memory Test Error

P1608 Powertrain Control Module (ECM CPU) DTC Test Fault

P1609 Powertrain Control Module (ECM CPU) Knock Sensor Circuit

P1621 lmmobilizer System Fault

P1622 lmmobilizer System Fault

P1623 lmmobilizer System Fault

P1624 lmmobilizer System Fault

P1627 Powertrain Control Module (ECM/TCS) Line Communication Error

P1628 Powertrain Control Module (ECM/TCS) Any Line Communication Error

P1631 Generator Output Voltage Signal (No Output)

P1632 Battery Voltage Monitor Circuit

P1633 Battery Overcharge Fault

P1634 Generator Terminal 'B' Circuit Open

P1650 Power Steering Pressure Switch Out of Range Fault

P1651 Power Steering Pressure Switch Circuit

P1652 Power Steering Pressure Switch Circuit

P1701 Transmission Range Sensor Reverse Engagement Error

P1702 Transmission Range Sensor Circuit Intermittent

P1703 Brake On/Off Switch Out of Self Test Range

P1705 Transmission Range Sensor out of Self Test Range

P1709 Clutch Pedal Position Switch Circuit

P1711 Transmission Fluid Temperature Sensor Circuit out of Self Test Range

P1713 Transmission Fluid Temperature Sensor Circuit

P1714 Shift Solenoid '1' Mechanical Fault

P1715 Shift Solenoid '2' Mechanical Fault

P1716 Shift Solenoid '3' Mechanical Fault

P1717 Shift Solenoid '4' Mechanical Fault

P1718 Transmission Fluid Temperature Sensor Circuit

P1720 Vehicle Speed Sensor '2' Signal Error

P1729 Transmission 4x4 Low Switch Error

P1740 Torque Converter Clutch Solenoid Mechanical Fault

P1741 Torque Converter Clutch Control Electrical Fault

P1742 Torque Converter Clutch Solenoid Shorted

P1743 Torque Converter Clutch Failed On - TCIL is On

P1744 Torque Converter Clutch Solenoid Mechanical Fault

P1746 Electronic Pressure Control Solenoid Circuit Open

P1747 Electronic Pressure Control Solenoid Circuit

P1749 Electronic Pressure Control Solenoid Circuit Low

P1751 Transmission Shift Solenoid 'A' Mechanical Fault

P1752 Transmission Shift Solenoid 'A' Circuit Shorted

P1754 Transmission Coast Clutch Solenoid Electrical Fault

P1756 Transmission Shift Solenoid 'B' Mechanical Fault

P1757 Transmission Shift Solenoid 'B' Circuit Shorted

P1761 Transmission Shift Solenoid '3' Mechanical Fault

P1762 Transmission SS3/SS4/OD Band Fault

P1765 Transmission 3-2 Timing Solenoid Valve

P1767 Torque Converter Clutch Solenoid Circuit

P1771 Throttle Position Sensor Circuit Open to Transmission Control Module

P1772 Throttle Position Sensor Circuit Shorted to Transmission Control Module

P1780 Transmission Control Switch Circuit

P1780 Overdrive Off Switch not Cycled during the Self Test

P1781 Transmission 4x4 Low Switch out of Range Fault

P1783 Transmission Fluid Temperature High Input

P1788 3-2T/CCS Circuit Open

P1789 3-2T/CCS Circuit Shorted

P1794 Powertrain Control Module Battery Direct Power Circuit

P1797 P/N Switch Open or Short Circuit

P1900 Turbine Speed Sensor Circuit Intermittent

P1901 Torque Converter Clutch Circuit Intermittent

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Q: What is engine check code P112 on a 99 Mazda 626lX V6 engine?
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