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P2BA9 Code - NOx Exceedence - Insufficient Reagent Quality

- Code Popularity: 36,056 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P2BA9?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty NOx Sensors
  • NOx Sensors harness is open or shorted
  • NOx Sensors circuit poor electrical connection
  • Fualty Diesel Particulate Filter (DPF)
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How to Fix the DTC P2BA9?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2BA9 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P2BA9 Description

The selective catalytic reduction system reduces oxides of nitrogen (NOx) emissions by injecting a metered amount of diesel exhaust fluid or reductant into the exhaust gas stream entering the diesel particulate filter (DPF). Within the selective catalytic reduction catalyst, the reductant reacts with the NOx to form nitrogen, carbon dioxide, and water vapor. Upstream and downstream NOx sensors provide the Engine Control Module (ECM) with engine-out and tailpipe-out NOx levels.
The ECM uses the 2 NOx sensors to control exhaust NOx levels. The NOx sensor measures the amount of NOx and oxygen in the exhaust system. The first NOx sensor is located at the outlet of the turbocharger and monitors the engine out NOx. The second NOx sensor is located in the DPF that monitors NOx levels exiting the DPF. The ECM varies the amount of reductant added by varying the reductant injector duty cycle in response to changes in engine exhaust out NOx levels.

OBDII Code P2BA9 - NOx Exceedence - Insufficient Reagent Quality - AutoCodes.com
P2BA9 Code - NOx Exceedence - Insufficient Reagent Quality

Need More Information on the Code?

Need more information on how to fix the P2BA9 code? Get Access to Factory Service Manuals

Information for Specific Makes

  • P2BA9 Chevrolet NOx Exceedence - Insufficient Reagent Quality
  • P2BA9 Dodge NOx Exceedence - Insufficient Reagent Quality
  • P2BA9 GMC NOx Exceedence - Insufficient Reagent Quality

Need Help with the Code?

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Code P2BA9 comments

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