DTC P2237:00: Notes
DTC P2237:00 (LF, L5) DETECTION CONDITION AND POSSIBLE CAUSE
| DTC P2237:00 |
A/F sensor positive current control circuit open |
| DETECTION CONDITION |
- The PCM monitors the A/F sensor terminal D current. If the current approx. 0 A
while the A/F sensor active, the PCM determines that the A/F sensor positive current control circuit is open.
Diagnostic support note
- This is a continuous monitor (A/F sensor, HO2S).
- The MIL illuminates if PCM detects the above malfunctioning condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
- PENDING CODE is available if PCM detects the above malfunction conditions during first drive cycle.
- FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
- The DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- A/F sensor connector or terminals malfunction
- PCM connector or terminals malfunction
- Open circuit in wiring harness between A/F sensor terminal B and PCM terminal 2AD
- A/F sensor malfunction
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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