P1148 Possible Causes
- Faulty Heated Oxygen Sensor 1, Bank 1
- Open or short circuit in Heated Oxygen Sensor 1, Bank 1 circuit
- Electrical connection of Heated Oxygen Sensor 1, Bank 1 circuit
How to Fix Code P1148?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or engine service warning light soon)
P1148 Meaning
The Engine Control Module (ECM) performs an ON/OFF operation check of the Air/Fuel (A/F) ratio heater / corresponding Heated Oxygen Sensor 1 according to the engine operating condition to maintain the Air/Fuel (A/F) ratio / Heated Oxygen Sensor 1 element temperature within the specified range.