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18/04/2022 9:57 am
Topic starter
GM 6.2 DI engine
Not car. Boat engine
DTC 8933 : O2 sensor 2 pump cell slow to warm up. SPN: 67063 FMI : 10
DTC 8915 : O2 sensor 1 pump cell slow to warm up. SPN: 3225 FMI: 10
What code are they!?
This error code occurs frequently. Replaced all 4 oxygen sensors (2 pre and 2 post).
Any help would be appreciated.
2 Answers
2
18/04/2022 10:42 am
Check all your electrical connections to the sensors for looseness and corrosion. Check you alternator of proper output, especially since the codes say the 02 sensor heaters are slow to warm up.
Alternator charging voltage is 14.3~14.5 v.
Is it possible if the positive battery wire and ground wire are loose?
2
18/04/2022 11:09 am
Yes. Check the connections for looseness and corrosion.