DTC P0037: Notes
DTC P0037 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES
| DTC P0037 |
HO2S heater (RR) circuit low |
| DETECTION CONDITION |
- The PCM monitors the HO2S heater (RR) control signal at PCM terminal 2AT. If the PCM turns the HO2S heater (RR) off but the HO2S heater (RR) circuit remains low voltage, the PCM determines that the HO2S heater (RR) circuit has a malfunction.
Diagnostic support note
- This is a continuous monitor (HO2S heater).
- MIL illuminates if the PCM detects the above malfunction 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 the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA is available.
- DTC is stored in PCM memory.
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| POSSIBLE CAUSE |
- HO2S heater (RR) malfunction
- Connector or terminal malfunction
- Open circuit between ignition switch and HO2S (RR) terminal C
- Short to ground circuit between HO2S (RR) terminal D and PCM terminal 2AT
- Open circuit between HO2S (RR) terminal D and PCM terminal 2AT
- PCM malfunction
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