OBD Guide

P24CB

Reductant Tank Cap Switch Circuit

P24CB is an OBD-II diagnostic trouble code meaning: Reductant Tank Cap Switch Circuit. Common causes: tank cap sensor malfunction, open or short circuit in wiring. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Check Engine Light Is On
  • Detected by the diagnostic system
  • possible engine power restrictions
  • error message on the dashboard
  • Possible problems with the SCR system

Causes

  • Tank cap sensor malfunction
  • Open or short circuit in wiring
  • Poor contact in the sensor connector
  • Loose or damaged tank cap
  • Problems with the SCR control module

How to Fix

  1. Check that the tank lid is closed correctly
  2. Inspect the sensor wiring and connectors
  3. Check sensor resistance
  4. Scan the system for other errors
  5. If necessary, replace the sensor or wiring

Related codes

Error P24CB by Vehicle Brand

FAQ

What does the P24CB code mean?

P24CB is an OBD-II diagnostic trouble code that indicates: Reductant Tank Cap Switch Circuit

What causes a P24CB error code?

The most common causes of P24CB include: Tank cap sensor malfunction; Open or short circuit in wiring; Poor contact in the sensor connector; Loose or damaged tank cap.

How do I fix a P24CB diagnostic trouble code?

To fix P24CB: Check that the tank lid is closed correctly. Inspect the sensor wiring and connectors. Check sensor resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P24CB?

Yes, but get it checked soon

How much does it cost to fix P24CB?

The estimated repair cost for P24CB is $17–56. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat