OBD Guide

P24E7

NH3 Sensor Heater Circuit Low

P24E7 is an OBD-II diagnostic trouble code meaning: NH3 Sensor Heater Circuit Low. Common causes: nh3 sensor malfunction, open or short circuit in the heater 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
  • Increased emissions of harmful substances
  • Reduced efficiency of the SCR system
  • Possible problems starting the engine in cold weather

Causes

  • NH3 sensor malfunction
  • Open or short circuit in the heater circuit
  • Fuse or relay problems
  • Engine control unit (ECU) malfunction

How to Fix

  1. Check the continuity of the NH3 sensor heater circuit
  2. Check fuses and relays associated with the heater circuit
  3. Test the NH3 sensor for malfunctions
  4. If necessary, replace the NH3 sensor
  5. Check and, if necessary, reflash the engine control unit

Related codes

Error P24E7 by Vehicle Brand

FAQ

What does the P24E7 code mean?

P24E7 is an OBD-II diagnostic trouble code that indicates: NH3 Sensor Heater Circuit Low

What causes a P24E7 error code?

The most common causes of P24E7 include: NH3 sensor malfunction; Open or short circuit in the heater circuit; Fuse or relay problems; Engine control unit (ECU) malfunction.

How do I fix a P24E7 diagnostic trouble code?

To fix P24E7: Check the continuity of the NH3 sensor heater circuit. Check fuses and relays associated with the heater circuit. Test the NH3 sensor for malfunctions. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P24E7?

Yes, but get it checked soon

How much does it cost to fix P24E7?

The estimated repair cost for P24E7 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat