Peter at 18:42, 18 September 2025

2025-09-18T18:42:56Z

← Older revision		Revision as of 18:42, 18 September 2025
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	== ~~18432~~/P2000~~/008192~~ - NOx Catalyst/Trap Bank 1: Efficiency Below Threshold ==		== P2000 - NOx Catalyst/Trap Bank 1 ==
			=== P2000 - NOx Catalyst/Trap Bank 1: Efficiency Below Threshold ===

	== Possible Symptoms ==		==== Possible Symptoms ====
	* MIL (Malfunction Indicator Lamp) ON		* MIL (Malfunction Indicator Lamp) ON
	* DTC stored in ECM		* DTC stored in ECM
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	* Fuel economy concerns during regeneration cycles		* Fuel economy concerns during regeneration cycles

	== Possible Causes ==		==== Possible Causes ====
	* NOx Catalyst efficiency below threshold		* NOx Catalyst efficiency below threshold
	* Faulty or aging NOx Catalyst		* Faulty or aging NOx Catalyst
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	* Low reductant consumption or dosing malfunction		* Low reductant consumption or dosing malfunction

	== Monitoring Conditions ==		==== Monitoring Conditions ====
	* Monitor Strategy: NOx Efficiency Below Threshold		* Monitor Strategy: NOx Efficiency Below Threshold
	* Malfunction Criteria:		* Malfunction Criteria:
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	* MIL Illumination: 2 DCY		* MIL Illumination: 2 DCY

	== Possible Solutions ==		==== Possible Solutions ====
	* Check Oxygen Sensor 1 Before Catalytic Converter -GX10-		* Check Oxygen Sensor 1 Before Catalytic Converter -GX10-
	* Check Oxygen Sensor 1 After Catalytic Converter -GX7-		* Check Oxygen Sensor 1 After Catalytic Converter -GX7-
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	* Replace NOx Catalyst if efficiency cannot be restored		* Replace NOx Catalyst if efficiency cannot be restored

	== Special Notes ==		==== Special Notes ====
	* This fault indicates the ECM has determined that the NOx Catalyst is not reducing emissions efficiently enough under monitored conditions.		* This fault indicates the ECM has determined that the NOx Catalyst is not reducing emissions efficiently enough under monitored conditions.
	* Aged catalysts or sulfur-contaminated fuel are common causes.		* Aged catalysts or sulfur-contaminated fuel are common causes.
	* Always verify O₂ sensor functionality and exhaust tightness before replacing the NOx Catalyst.		* Always verify O₂ sensor functionality and exhaust tightness before replacing the NOx Catalyst.
	* Repair information and test procedures vary by engine; always confirm with the official factory repair manual.		* Repair information and test procedures vary by engine; always confirm with the official factory repair manual.

Peter: Created page with "FORCETOC == 18432/P2000/008192 - NOx Catalyst/Trap Bank 1: Efficiency Below Threshold == == Possible Symptoms == * MIL (Malfunction Indicator Lamp) ON * DTC stored in EC..."

2025-09-17T19:05:14Z

Created page with "__FORCETOC__ == 18432/P2000/008192 - NOx Catalyst/Trap Bank 1: Efficiency Below Threshold == == Possible Symptoms == * MIL (Malfunction Indicator Lamp) ON * DTC stored in EC..."

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__FORCETOC__

== 18432/P2000/008192 - NOx Catalyst/Trap Bank 1: Efficiency Below Threshold ==

== Possible Symptoms ==
* MIL (Malfunction Indicator Lamp) ON
* DTC stored in ECM
* Possible loss of power (limp mode)
* Increased NOx emissions
* Fuel economy concerns during regeneration cycles

== Possible Causes ==
* NOx Catalyst efficiency below threshold
* Faulty or aging NOx Catalyst
* Faulty Oxygen Sensor 1 Before Catalytic Converter -GX10-
* Faulty Oxygen Sensor 1 After Catalytic Converter -GX7-
* Faulty or slow Exhaust Gas Temperature Sensor(s)
* Poor quality fuel or incorrect sulfur content
* Exhaust leaks upstream or around NOx Catalyst
* Adaptation values for O₂ sensors not realized
* Low reductant consumption or dosing malfunction

== Monitoring Conditions ==
* Monitor Strategy: NOx Efficiency Below Threshold
* Malfunction Criteria:
** O₂ signal post NOx Catalyst < 0.95
** O₂ signal pre NOx Catalyst < 0.045
** Mass of reductant consumption < 0.9 g
* Enable Conditions:
** Regeneration demand for NOx Catalyst = ON
** Adaptation of O₂ sensors pre and post NOx Catalyst = realized
** Engine speed 1,000 – 2,750 RPM
** Upstream turbine temp 50 – 850 °C
** Temperature of upstream NOx Catalyst 220 – 550 °C
** Engine coolant temp 40 – 105 °C
** Fuel temp < 90 °C
** Accelerator pedal position > 1.0 % and < 100.0 %
** Engine run time > 240 s
** Barometric pressure > 750 hPa
* Monitoring Time Length: 10.0 s
* MIL Illumination: 2 DCY

== Possible Solutions ==
* Check Oxygen Sensor 1 Before Catalytic Converter -GX10-
* Check Oxygen Sensor 1 After Catalytic Converter -GX7-
* Check Exhaust Gas Temperature Sensors
* Inspect for exhaust leaks before and around NOx Catalyst
* Verify reductant (AdBlue®) dosing and consumption
* Check for correct fuel quality (low sulfur, per manufacturer spec)
* Replace faulty O₂ sensor(s) or EGT sensor(s) as necessary
* Replace NOx Catalyst if efficiency cannot be restored

== Special Notes ==
* This fault indicates the ECM has determined that the NOx Catalyst is not reducing emissions efficiently enough under monitored conditions.
* Aged catalysts or sulfur-contaminated fuel are common causes.
* Always verify O₂ sensor functionality and exhaust tightness before replacing the NOx Catalyst.
* Repair information and test procedures vary by engine; always confirm with the official factory repair manual.

18432/P2000/008192 - Revision history

Peter at 18:42, 18 September 2025

Peter: Created page with "__FORCETOC__ == 18432/P2000/008192 - NOx Catalyst/Trap Bank 1: Efficiency Below Threshold == == Possible Symptoms == * MIL (Malfunction Indicator Lamp) ON * DTC stored in EC..."

Peter: Created page with "FORCETOC == 18432/P2000/008192 - NOx Catalyst/Trap Bank 1: Efficiency Below Threshold == == Possible Symptoms == * MIL (Malfunction Indicator Lamp) ON * DTC stored in EC..."