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DTC P00B3:00: Notes

DTC P00B3:00 (L3 WITH TC) DETECTION CONDITION & POSSIBLE CAUSES

DTC P00B3:00 ECT sensor No. 2 circuit low input
DETECTION CONDITION 
  • The PCM monitors the ECT sensor No. 2 signal. If the PCM detects that the ECT sensor No. 2 voltage is below 0.25 V  for 5 s  , the PCM determines that the ECT sensor No. 2 circuit has a malfunction.

Diagnostic support note 
  • This is a continuous monitor (engine cooling system).
  • The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • ECT sensor No. 2 connector or terminals malfunction
  • ECT sensor No. 2 malfunction
  • Short to ground in wiring harness between ECT sensor No. 2 terminal A and PCM terminal 2AP
  • PCM connector or terminals malfunction
  • ECT sensor No. 2 signal circuit and ground circuit are shorted to each other.
  • PCM malfunction
G06731615Courtesy of MAZDA MOTORS CORP.
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