O2 Sensor 1/2 Heater Circuit Low

P0141 - O2 SENSOR 1/2 HEATER CIRCUIT LOW

P0141 - O2 Sensor 1/2 Heater Circuit Low:

WHEN MONITORED
Engine Running and Heater duty cycle greater than 0%

SET CONDITION
The PCM detects the O2 Heater voltage is out of acceptable range. Below 0.0926 volt.

POSSIBLE CAUSES
- O2 heater control short to ground
- O2 heater element
- Powertrain control module

DIAGNOSTIC TEST




1. CHECK FOR CURRENT DTC

Turn the ignition on.
With the DRB III(R), read PCM DTCs.

Q: Is this DTC present?

YES: For complete diagnosis of this DTC, refer to (P0135) O2 SENSOR 1/1 HEATER CIRCUIT LOW. P0135

NO: Go To 2

2. INTERMITTENT WIRING AND CONNECTORS

The conditions necessary to set this DTC are not present at this time.

NOTE:
- Check connectors - Clean/repair as necessary. Poor pin to terminal connections can set DTCs. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors specific to this DTC. Wiggle the wires while checking for shorts and open circuits.
- Check for any Technical Service Bulletins that may apply.

Q: Were there any problems found?

YES: Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST - VER 2. Powertrain Verification Test - Ver 2

NO: The condition that caused this DTC to set is currently not present. Inspect the related wiring harness for a possible intermittent condition.