CarFaultIQ

OBD-II Code Decoder

Search the licensed P, B, C, and U reference library by code, definition, system, or manufacturer. Reference-only results are not a complete diagnosis.

  • 12,128 OBD-II codes
  • 18,805 reference definitions
  • 16,185 publicly searchable across 10,181 codes

Review-withheld definitions are excluded; lookup records are not published diagnostic pages.

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P1406 — vehicles with official records naming this code

P1406 is named in NHTSA-published manufacturer communications or investigations for 4 vehicle families, including:

A code named in a manufacturer communication means the document refers to it for those vehicles. It is not a diagnosis of any car, and it does not mean the code is common on that vehicle.

Matching definitions: 17 · Unique codes: 1.

Code Meaning System Scope Manufacturer Severity
P1406 Heated Catalyst Internal Control Module Checksum ROM Error Powertrain Manufacturer-specific BMW Not classified
P1406 EGR Valve Pintle Position Circuit Powertrain Manufacturer-specific Buick Not classified
P1406 EGR Valve Pintle Position Circuit Powertrain Manufacturer-specific Cadillac Not classified
P1406 EGR Valve Pintle Position Circuit Powertrain Manufacturer-specific Chevrolet Not classified
P1406 EGR Valve Pintle Position Circuit Powertrain Manufacturer-specific Chrysler Not classified
P1406 Differential Pressure Feedback Electronic Sensor Circuit Downstream Hose Powertrain Manufacturer-specific Ford Not classified
P1406 EGR Valve Pintle Position Circuit Powertrain Manufacturer-specific General Motors Not classified
P1406 EGR Valve Pintle Position Circuit Powertrain Manufacturer-specific GMC Not classified
P1406 Differential Pressure Feedback Electronic Sensor Circuit Downstream Hose Powertrain Manufacturer-specific Lincoln Not classified
P1406 DPFE Sensor Downstream Hose Off Or Plugged Powertrain Manufacturer-specific Mazda Not classified
P1406 Differential Pressure Feedback Electronic Sensor Circuit Downstream Hose Powertrain Manufacturer-specific Mercury Not classified
P1406 EGR Valve Pintle Position Circuit Powertrain Manufacturer-specific Oldsmobile Not classified
P1406 EGR Valve Pintle Position Circuit Powertrain Manufacturer-specific Plymouth Not classified
P1406 EGR Valve Pintle Position Circuit Powertrain Manufacturer-specific Pontiac Not classified
P1406 EGR Valve Pintle Position Circuit Powertrain Manufacturer-specific Saturn Not classified
P1406 Turbo Pressure Sensor Range Performance Problem Powertrain Manufacturer-specific Toyota Not classified
P1406 EGR Temperature Sensor Range Performance Powertrain Manufacturer-specific Volkswagen Not classified