AUDI
Reported code forms P049100
Summary of all Vin-4-Pin topics for June Check engine light after charging - P0E5E00 Rattle noise from sound generator Vehicle sound malfunction warning Oil leak from oil filter drain off valve Secondary air codes…
HomeP0491 · Manufacturer communications
P0491 · Manufacturer communications
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
ASTON MARTIN
Reported code forms P0491
V12 Secondary air injection codes P0492 P0491
AUDI
Reported code forms P049100
This bulletin contains diagnosis and repair information for DTC P049100 and P049200.
VOLKSWAGEN
Reported code forms P0491
Technical Bulletin (Update Programming, DTCs P0491 and or P2440 stored in the ECM Fault Memory): Current ECM software are causing erroneous faults. This document contains the codes necessary to update the software to…
AUDI
Reported code forms P0491
The MIL is on due to DTCs P0491 and P0492 being stored in the ECM.
AUDI
Reported code forms P0491
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…
AUDI
Reported code forms P0491
MIL on, A8 4.2 FSI, P0491 or P0492 secondary air system bank 1/2 Insufficient flow - Repair Authorization
AUDI
Reported code forms P0491
MIL on. DTC P0491 and P0492 (Secondary Air System Insufficient Flow, Bank 1/2) are stored at the same time.
AUDI
Reported code forms P0491
DTC P0491 and P0492 (Secondary Air System Insufficient Flow, Bank 1/2) are stored at the same time.
AUDI
Reported code forms P0491
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…
PORSCHE
Reported code forms P0491
REPLACEMENT SHEETS (SUPPLEMENT) FOR OBD II MANUAL (OBD II) / DME 7.8: FAULT CODES P0410/P0491/P0492/P1411. *TT