Aftertreatment Diesel Injection Control Module Performance

This code means the computer is not getting the expected performance from the diesel injection module that helps clean up emissions. This could be due to issues in the wiring or the module itself. For example, it might expect to see a voltage between 0.5 and 4.5 volts as a signal but sees something out of that range.

The computer monitors the aftertreatment diesel injection control module and expected control signals or feedback values. If it detects that the module isn't operating within preset parameters over a series of checks, it triggers this code.

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

1. 1Check the wiring and connectors between the aftertreatment diesel injection module and the ECU for damage or corrosion. Repair as needed before continuing.
2. 2Verify that the diesel fuel pressure is within the manufacturer's specifications (usually between 20-60 psi) during operation.
3. 3Use a scan tool to check for any additional fault codes related to the aftertreatment system. Address those issues first as they may be causing this code.
4. 4Test the output from the aftertreatment diesel injection control module using a multimeter to confirm that it operates within the expected voltage range (0.5-4.5V). If out of range, replace the module and retest.
5. 5If all tests are within spec but the code persists, consider checking for software updates to the ECU.

• Faulty aftertreatment diesel injection control module
• Damaged wiring or poor connections to the module
• Insufficient fuel pressure to the aftertreatment system
• Defective sensors related to the aftertreatment system
• Software issue in the engine control unit (ECU)

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