Dodge P1621: O2 Sensor Reference Voltage Circuit Low
Is your scanner showing Dodge P1621?
No worries. We'll show you what it means and how to deal with it.
Dodge P1621: O2 Sensor Reference Voltage Circuit Low
OVERVIEWWhat Does The Dodge P1621 Code Mean?
The Oxygen Sensor return circuit voltage for the O2 Sensors is less than 0.9 – 0.96 volts depending on calibration for approximately 9.0 seconds.
What Are The Potential Causes Of The Dodge P1621 Code?
- O2 sensor return circuit shorted to ground
- Oxygen (O2) sensor
- Powertrain control module (PCM)
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> MOSTPLUS 234-4587 Oxygen Sensor
>>> Engine Control Module - Direct Fit, Sold individually
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
Dodge P1621, DTCDECODE.
