P0492

Secondary Air Injection System Insufficient Flow Bank 2

DTC P0492, sometimes indicated as P049200 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the auxiliary emissions system causing secondary air injection system insufficient flow bank 2.

The secondary air injection system helps the engine run more efficiently by providing additional oxygen to the cylinders. If the flow of air to the system is insufficient, the P0492 code will be set.
There are several things that can cause this problem, including a blocked air filter, a defective air pump, or a leak in the air injection system.
If you have this code, it's best to take your car to a mechanic to have it diagnosed and repaired.

  • P0492: Secondary Air Injection System Insufficient Flow Bank 2
  • P0492: Secondary Air System (Bank 2)
  • P0492: Secondary air injection (AIR) system, bank 2 – malfunction
  • P0492 00: Secondary air injection (AIR) system, bank 2 - malfunction

DTC Trouble Code Search
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • 26 12 15 2026528 - VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:AIR HANDLER/CHAMBER, DUCTS, AND VALVES
    AUDI: Mil on. Dtc P0491 and P0492 (secondary air system insufficient flow, bank 1/2) are stored at the same time.
  • 26 12 15 2026528 - ELECTRICAL SYSTEM
    AUDI: Dtc P0491 and P0492 (secondary air system insufficient flow, bank 1/2) are stored at the same time.
  • SB-03-0450V2 - POWER TRAIN
    ASTON MARTIN: V12 secondary air injection codes P0492 P0491
  • A011710 2035002- - EQUIPMENT
    AUDI: This bulletin contains diagnosis and repair information for dtc P049100 and P049200.
  • A011383 2033001- - ENGINE AND ENGINE COOLING:COOLING SYSTEM
    AUDI: Mil on. Dtc P0491 and P0492 (secondary air system insufficient flow, bank 1/2) are stored at the same time. Mileage is greater than 15,000 miles. Under certain driving conditions, the secondary air ports in the cylinder head can accumulate
  • A261215 2026528- - ELECTRICAL SYSTEM
    AUDI: Supersedes technical service bulletin group 26 number 12-10 dated march 30, 2012. Mil on. Dtc P0491 and P0492 (secondary air system insufficient flow, bank 1/2) are stored at the same time. Mileage greater than 20,000 miles.
  • A011511 2039899- - POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
    AUDI: The mil is on due to dtcs P0491 and P0492 being stored in the ecm.
  • 604 - EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
    PORSCHE: Replacement sheets (supplement) for obd ii manual (obd ii) / dme 7.8: fault codes P0410/P0491/P0492/P1411. *tt
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