DTC P0135 - O2 Sensor Heater Circuit (Bank 1 Sensor 1)

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2018 Lincoln Navigator, 2018 Lincoln MKZ, 2018 Lincoln MKX, 2018 Lincoln MKT, and 2018 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.

P0135 - O2 SENSOR HEATER CIRCUIT (BANK 1 SENSOR 1)

Description:	This DTC sets when an open or short circuit is detected or the heater current draw exceeds a calibrated limit.
Possible Causes:	UO2SHTR11 circuit open (if equipped) UO2SHTR11 circuit short to voltage (if equipped) HTR11 circuit open (if equipped) HTR11 circuit short to voltage (if equipped) VPWR circuit open Low battery voltage Water in the harness connector Corrosion Incorrect connections Damaged universal heated oxygen sensor bank 1, sensor 1 (HO2S11) heater (if equipped) Damaged HO2S11 heater (if equipped)
Diagnostic Aids:	Inspect the connectors for signs of damage, water intrusion or corrosion.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
EcoSport 1.5L, KA	GO to PINPOINT TEST DW .
All others	GO to PINPOINT TEST DZ .