OBD Guide

P24ED

NH3 Sensor Calibration Memory

P24ED is an OBD-II diagnostic trouble code meaning: NH3 Sensor Calibration Memory. Common causes: nh3 sensor malfunction, problems with the sensor electrical circuit. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced engine power
  • Increased fuel consumption
  • Increased NOx emissions
  • Possible emergency operation of the engine

Causes

  • NH3 sensor malfunction
  • Problems with the sensor electrical circuit
  • ECU software failure
  • Sensor is dirty or damaged
  • Problems with the SCR system

How to Fix

  1. Check the electrical circuit of the NH3 sensor
  2. Test the NH3 sensor using diagnostic equipment
  3. Update ECU software
  4. If necessary, replace the NH3 sensor
  5. Check the operation of the SCR system

Related codes

Error P24ED by Vehicle Brand

FAQ

What does the P24ED code mean?

P24ED is an OBD-II diagnostic trouble code that indicates: NH3 Sensor Calibration Memory

What causes a P24ED error code?

The most common causes of P24ED include: NH3 sensor malfunction; Problems with the sensor electrical circuit; ECU software failure; Sensor is dirty or damaged.

How do I fix a P24ED diagnostic trouble code?

To fix P24ED: Check the electrical circuit of the NH3 sensor. Test the NH3 sensor using diagnostic equipment. Update ECU software. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P24ED?

Yes, but get it checked soon

How much does it cost to fix P24ED?

The estimated repair cost for P24ED is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat