Mazda MAZDA5 2010 — technical service bulletin
Bulletin 01-025-13-2822 · NHTSA communication 10097702 · issued Aug 22, 2013
Technical service bulletin
communication type
Power Train
component
2010
model years
1
vehicle entries
Official summary
Some vehicles may experience the mil on with dtc p0139 (ho2s circuit malfunction) stored in pcm memory. The pcm:1.monitors for a time-out malfunction (when ho2s remains above 0.2v for longer than a specified period of time during fuel cut control).2.measures the amount of time from when conditions are met until ho2s output voltage drops below 0.2v.3.determines a ho2s timeout malfunction when the detected time is more than 4 seconds for 2 of 3 times.this may be caused by carbon forming inside the electric throttle body (etb) which:1.reduces the air intake amount during deceleration (with fuel c
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.