DETECTION
CONDITION
and excessive current draw.
z
The test fails when the current draw exceeds a calibrated limit or an open or short
circuit is detected.
POSSIBLE CAUSE
z
Short to ground between HO2S terminal A and HO2S terminal C
z
Short to ground between HO2S terminal A and HO2S terminal D
z
Short to ground between HO2S terminal A and HO2S terminal B
z
Water in the wiring harness connector
z
Open circuit between PCM terminal 2J and front HO2S (RH) terminal A
z
Open circuit between PCM terminal 2AS and rear HO2S (RH) terminal A
z
Open circuit between PCM terminal 2E and front HO2S (LH) terminal A
z
Open circuit between PCM terminal 2AO and rear HO2S (LH) terminal A
z
Low battery voltage
z
Corrosion or incorrect harness connections
z
HO2S heater malfunction
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
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