Powertrain
generic / SAE
P0144
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3)
The ECU detects an abnormally low voltage from the third O2 sensor on bank 1. Indicates persistently lean exhaust, an open sensor or wiring shorted to ground.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 44
Possible causes
- Lean exhaust (vacuum leak, low fuel pressure) high
- Signal wire shorted to ground medium
- O2 sensor failed medium
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Inspection / repair
- Difficulty: easy
- DIY: possible
Pro mode: costs, time and components
Free with the newsletter by Fabian Brose: enter your name and email, confirm by mail – Pro mode is then unlocked on this device for 30 days. The newsletter arrives about every two weeks, unsubscribe at any time. Already subscribed? One click is enough – you will be recognised.
Unlock Pro mode for freeSources
References
sae:J2012