LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2013 >> Focus ST >> Repair and Diagnosis >> External Pages >> Different car >> Section 709 (Engine Controls (Except Diesel & Hybrid) - Powertrain DTC Descriptions - DTC P0001 - P0192) >> DTC P0135: O2 Heater Circuit (Bank 1, Sensor 1)

DTC P0135: O2 Heater Circuit (Bank 1, Sensor 1)

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2012 Lincoln Navigator L, 2012 Lincoln Navigator, 2012 Lincoln MKZ, 2012 Lincoln MKX, and 2012 Lincoln MKT. However, it is still accessible from the selected car via links, so may be relevant.
P0135 - O2 HEATER CIRCUIT (BANK 1, SENSOR 1)

Description:  This DTC sets when an open or short circuit is detected or the HO2S heater current draw exceeds a calibrated limit.
Possible Causes: 
  • UO2SHTR circuit open (if equipped)
  • UO2SHTR circuit short to voltage (if equipped)
  • HO2S HTR11 circuit open (if equipped)
  • HO2S HTR11 circuit short to voltage (if equipped)
  • VPWR circuit open
  • GND circuit open
  • Low battery voltage
  • Water in the harness connector
  • Corrosion
  • Incorrect connections
  • Damaged HO2S heater
Diagnostic Aids:  Inspect the connectors for signs of damage, water ingress, or corrosion.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
E-Series 6.8L,
Escape 2.5L Manual
Transmission,
Fiesta,
Fusion 3.5L,
Fusion 2.5L Manual
Transmission,
MKZ,
Transit Connect		 GO to PINPOINT TEST DW .
All others GO to PINPOINT TEST DZ .
scientia non olet · About LEMON Manuals