2005 Mazda MPV diagnostic codes

2005 MAZDA MPV
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LUMPY46JE
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Engine Performance problem
2005 Mazda MPV 6 cyl Two Wheel Drive 92,000 miles

I'm getting p0134 (O2 sensor CKT No activity Bank 1 sensor 1) and P0154 (O2 sensor CKT No activity Bank 2 sensor 1). I've replaced the Upstream O2 sensor and I'm still getting the same 2 codes. Before I replace the Downstream sensor I want to make sure if I'm headed in the right direction
Feb 27, 2010 at 5:27 PM
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MHPAUTOS
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Hi there,

I would be doing a circuit continuity test from the up stream sensor to the ECU and if this is a heated O2 sensor check that circuit as well, start here.

Mark (mhpautos)
Feb 27, 2010 at 6:15 PM
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