Reductant Tank Cap Switch Circuit Range or Performance
Same as P24CB with input in plausible range yet not matching driver action.
Affected components
- Reductant tank cap switch
Common causes
- High likelihood: Contact drifted
Possible symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.