Diagnostic Trouble Codes (DTCs) P0135, P0141, P0155 and P0161 indicate a short to ground, or open, or short to VPWR in the HO2S heater circuit.
DTC/HO2S Reference List
DTC P0135 = HO2S HTR-11
DTC P0141 = HO2S HTR-12
DTC P0155 = HO2S HTR-21
DTC P0161 = HO2S HTR-22
Possible causes.
-- Shorts to VPWR in harness or HO2S.
-- Water in connectors.
-- Cut or pulled wires.
-- Disconnected wiring.
-- Open VPWR circuit.
-- Open GND circuit.
-- Low battery voltage.
-- Corrosion or poor mating terminals.
-- Damaged PCM.
NOTE:
On some applications, a vehicle hoist is required to access the HO2S harness.
l Visually inspect the HO2S circuit for exposed wiring, contamination, corrosion and proper installation.
l Were any concerns found during the visual inspection?
Yes
REPAIR any concerns found in the visual inspection. RESTORE vehicle. RERUN «Quick Test».
No
GO to «HA31».
