Mazda 626 1998–2000 — technical service bulletin
Bulletin 00400 · NHTSA communication 621306 · issued Mar 9, 2000
Technical service bulletin
communication type
Engine and Engine Cooling
component
1998–2000
model years
3
vehicle entries
Official summary
Some vehicles may exhibit a tapping noise which can be heard coming from the rear of the vehicle within the first 10 minutes after a cold start. This concern may be caused by the operation of the cdcv (canister drain cut valve) solenoid during the evaporative emission monitor. *tt
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.