| P1400 | DPFE Sensor Low Voltage (Mazda) |
| P1400 | DPFE Sensor Low Voltage (Ford) |
| P1401 | DPFE Sensor High Voltage (Mazda) |
| P1401 | DPFE Sensor High Voltage (Ford) |
| P1403 | DPFE Hoses Reversed (Mazda) |
| P1403 | No 5 Volts To EGR Sensor (Chrysler) |
| P1404 | Exhaust Gas Recirculation (EGR) Valve Pintle Stuck Open |
| P1405 | DPFE Upstream Hose Off Or Plugged (Mazda) |
| P1405 | DPFE Upstream Hose Off Or Plugged (Ford) |
| P1406 | DPFE Downstream Hose Off Or Plugged (Mazda) |
| P1406 | DPFE Downstream Hose Off Or Plugged (Ford) |
| P1407 | EGR No Flow Detected (Mazda) |
| P1408 | EGR Out Of Self Test Range (Mazda) |
| P1408 | EGR Out Of Self Test Range (Ford) |
| P1409 | Electronic Vacuum Regulator Control Circuit Malfunction (Mazda) |
| P1409 | EGR Vacuum Regulator Solenoid Circuit Malfunction (Ford) |
| P1411 | Secondary Air Injection System Downstream Flow (Ford) |
| P1413 | Secondary Air Injection System Monitor Circuit Low (Ford) |
| P1414 | Secondary Air Injection System Monitor Circuit High (Ford) |
| P1432 | THTRC Circuit Failure (Ford) |
| P1441 | Evaporative System Flow During Non-Purge |
| P1443 | Evaporative Emission Control System (Mazda) |
| P1443 | Small Or No Purge Flow Condition (Ford) |
| P1444 | Purge Flow Sensor Low Input (Mazda) |
| P1445 | Purge Flow Sensor High Input (Mazda) |
| P1450 | Unable To Bleed Up Fuel Tank Vacuum (Ford) |
| P1451 | EVAP Control System Canister Vent Solenoid Circuit Malfunction (Ford) |
| P1457 | Leak Detected In EVAP Control Sys.(EVAP Canister Sys.) (Acura) |
| P1460 | WOT A/C Cutoff Circuit Malfunction (Mazda) |
| P1460 | WOT A/C Cutoff Circuit Malfunction (Ford) |
| P1461 | ACP Sensor High Voltage (Ford) |
| P1462 | ACP Sensor Low Voltage (Ford) |
| P1463 | ACP Sensor Insufficent Pressure Change (Ford) |
| P1464 | A/C Demand Out Of Range (Ford) |
| P1469 | Low A/C Cycling Period (Ford) |
| P1474 | HCF Primary Circuit Failure (Ford) |
| P1474 | LFC Primary Circuit Failure (Ford) |
| P1476 | Too Little Secondary Air (Chrysler) |
| P1477 | Too Much Secondary Air (Chrysler) |
| P1477 | MFC Primary Circuit Failure (Ford) |
| P1478 | Battery Temp Sensor Volts Out of Limit (Chrysler) |
| P1479 | HFC Primary Circuit Failure (Ford) |
| P1479 | Transmission Fan Relay Circuit (Chrysler) |
| P1480 | PCV Solenoid Valve (Chrysler) |
| P1482 | Catalyst Temperature Sensor Circuit Shorted Low (Chrysler) |
| P1483 | Engine Cooling System Performance |
| P1483 | Catalyst Temperature Sensor Circuit Shorted High (Chrysler) |
| P1484 | Catalytic Converter overheat Detected (Chrysler) |
| P1485 | Air Injection Solenoid Circuit (Chrysler) |
| P1486 | Evap Leak Monitor Pinched Hose (Chrysler) |
| P1487 | Hi Speed Rad Fan CTRL Relay Circuit (Chrysler) |
| P1488 | Auxiliary 5 Volt Supply Output Too Low (Chrysler) |
| P1489 | High Speed Fan CTRL Relay Circuit (Chrysler) |
| P1490 | Low Speed Fan CTRL Relay Circuit (Chrysler) |
| P1491 | Rad Fan Control Relay Circuit (Chrysler) |
| P1491 | Malfunction In EGR System (Acura) |
| P1492 | Ambient/Batt Temp Sen Volts Too High (Chrysler) |
| P1493 | Ambient/Batt Temp Sen Volts Too Low (Chrysler) |
| P1494 | Leak Detection Pump Switch or Mechanical Fault (Chrysler) |
| P1495 | Leak Detection Pump Solenoid Circuit (Chrysler) |
| P1496 | 5 Volt Supply Output Too Low (Chrysler) |
| P1498 | High speed Rad Fan Ground CTRL Rly Circuit (Chrysler) |
| P1498 | Voltage Problem In EGR Valve Position Sensor Circuit (Acura) |