DTC P0031: Ho2S Heater Circuit Low (Bank 1 / Sensor 1): DTC Detecting Condition

DTC DETECTING CONDITION

Item	Detecting Condition	Possible Cause
DTC Strategy	Electrical Check	Related fuse blown or missing Open or short to ground in power supply or control harness Contact resistance in connectors Faulty HO2S
Enable Conditions	10V < Battery voltage < 16V 1% < Heater power < 99%
Threshold Value	Short to ground
Diagnostic Time	10 sec.
Fail Safe	Heater open loop control