P24CF

Reductant Tank Cap Switch Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Possible SCR system error message on the dashboard
Reducing engine power in emergency mode
Increased reductant consumption
Increased NOx emissions

Causes

Poor contact in the tank cap sensor connector
Open or short circuit in wiring
Malfunction of the tank cap sensor itself
Damaged or corroded contacts
Problems with the SCR control unit

How to Fix

Check the condition of the contacts and connector of the tank cover sensor
Check the sensor circuit for breaks and short circuits
Check sensor resistance according to specification
If necessary, replace the reductant tank cap sensor
Clear error codes and check if the code returns after several engine starts

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