How to check for a Ford p21b0 code?
How to check for a Ford p21b0 code? 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. The cost of diagnosing the P21B0 FORD code is 1.0 hour of labor. What causes the p21b0 Ford reductant level sensor to fail? 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. Need...