Volkswagen Routan 2011–2014 — technical service bulletin
Bulletin TT151203a · NHTSA communication 10238944 · issued Oct 19, 2012
Technical service bulletin
communication type
Electrical System
component
2011–2014
model years
4
vehicle entries
Official summary
When diagnosing faults P0300, P0301, P0302, P0303, P0304, P0305, and/or P0306 for cylinder misfires, perform a Cylinder Combustion Pressure Leakage Test before replacing any components.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.