DTC P0030: Ho2S Heater Control Circuit (Bank 1, Sensor 1)

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.

P0030 - HO2S HEATER CONTROL CIRCUIT (BANK 1, SENSOR 1)

For Vehicles With Universal HO2S
Description:	The powertrain control module (PCM) monitors the heater in the universal heated oxygen sensor (HO2S) for correct operation. The PCM controls the heater on and off duty cycle to maintain a calibrated temperature. The test fails when the sensor does not warm up to the required temperature in a calibrated amount of time. The test also fails when the PCM is not able to maintain the required temperature after the sensor is warm.
Possible Causes:	Open UO2S circuit Open UO2SGREF circuit Open UO2SHTR circuit UO2SHTR circuit short to voltage Incorrect connections Damaged or corroded terminals Exhaust temperature significantly higher than expected Damaged Universal HO2S
Diagnostic Aids:	Inspect the connectors for signs of damage, water ingress, or corrosion.
For Vehicles With HO2S (4-pin)
Description:	The powertrain control module (PCM) monitors the heater in the heated oxygen sensor (HO2S) for correct operation. The PCM controls the heater on and off duty cycle to maintain a calibrated temperature. The test fails when the sensor does not warm up to the required temperature in a calibrated amount of time. The test also fails when the PCM is not able to maintain the required temperature after the sensor is warm.
Possible Causes:	VPWR circuit open HO2S heater circuit open HO2S heater circuit short in the harness Incorrect connections Damaged or corroded terminals Exhaust temperature significantly higher than expected Damaged HO2S
Diagnostic Aids:	Inspect the connectors for signs of damage, water ingress, or corrosion.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
Edge, Escape/Mariner 2.5L Automatic Transmission, Escape/Mariner 3.0L, E-Series 4.6L, E-Series 5.4L, Expedition, Explorer, F-150, Flex, F-Series Super Duty, Fusion 2.5L, Fusion 3.0L, Milan, MKS, MKT, MKX, Mustang, Navigator, Taurus	GO to PINPOINT TEST DZ .
All others	GO to PINPOINT TEST DW .