LEMON Manuals
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Mazda
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2003
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MPV ES
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Self-Diagnostics
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Diagnostic Tests
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DTC P0134 Or DTC P0154
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Possible Causes
July 1:
So it begins
. Don't worry, this is not in the correct legal jurisdiction!
Possible Causes
Engine compression low.
Engine malfunction.
Exhaust system leak.
Front HO2S deterioration.
Front HO2S heater malfunction.
Open or short circuit between front HO2S and PCM harness connectors.