Reductant Level Sensor ‘C’ Circuit High
Table of contents
P21B0 FORD Possible Causes
- Faulty Reductant Level Sensor
- Reductant Level Sensor harness is open or shorted
- Reductant Level Sensor circuit poor electrical connection
- Faulty Reductant Heater and Sender Assembly
How do I fix code P21B0 FORD?
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 P21B0 FORD code
The cost of diagnosing the P21B0 FORD code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P21B0 FORD Description
The Powertrain Control Module (PCM) monitors the reductant level sensor circuits to the PCM for high and low voltage. The test fails if the voltage exceeds or falls below a calibrated limit for a calibrated amount of time.