DTC P0151:00 [MZI-3.7]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSE

DTC P0151:00	HO2S circuit low input (low side terminal)
DETECTION CONDITION	The PCM monitors the input signal from the HO2S. If the voltage from the HO2S is less than 0.4 V , the PCM determines that there is a malfunction in the HO2S circuit. Diagnostic support note The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle. FREEZE FRAME DATA is available The DTC is stored in the PCM memory.
POSSIBLE CAUSE	HO2S malfunction Connector or terminal malfunction Short to ground in wiring harness between HO2S (LH) terminal B and PCM terminal 3AB Short to ground in wiring harness between HO2S (RH) terminal B and PCM terminal 3Z PCM malfunction
Courtesy of MAZDA MOTORS CORP.

DTC P0151:00

HO2S circuit low input (low side terminal)

DETECTION CONDITION

The PCM monitors the input signal from the HO2S. If the voltage from the HO2S is less than 0.4 V , the PCM determines that there is a malfunction in the HO2S circuit.

Diagnostic support note

The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
FREEZE FRAME DATA is available
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

HO2S malfunction
Connector or terminal malfunction
Short to ground in wiring harness between HO2S (LH) terminal B and PCM terminal 3AB
Short to ground in wiring harness between HO2S (RH) terminal B and PCM terminal 3Z
PCM malfunction

Courtesy of MAZDA MOTORS CORP.