P123D - Nitrogen Oxide Sensor Sensor Poisoning Binary Lambda Signal Too Rich
P123D Possible Causes
- Faulty Nitrogen Oxide (NOx) Sensor Signal Linear Oxygen Sensor
- Nitrogen Oxide (NOx) Sensor Signal Linear Oxygen Sensor harness is open or shorted
- Nitrogen Oxide (NOx) Sensor Signal Linear Oxygen Sensor circuit poor electrical connection
How do I fix code P123D
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
Cost of diagnosing the P123D code
Labor: 1.0The cost of diagnosing the P123D code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
P123D Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P123D MeaningThe Engine Control Module (ECM) monitors the Nitrogen Oxide Sensor. The ECM sets the OBDII code when the Nitrogen Oxide Sensor is not to factory specifications.
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