Scribd
Upload
3K views2 pages

NOx Sensor Error Troubleshooting

The document outlines the P2BAD-00 DTC code related to NOx sensor exceedance with an unknown root cause, leading to engine de-rating and potential MIL activation. It provides a detailed inspection and troubleshooting guide, including visual checks, error code analysis, and remedial actions. The document emphasizes the importance of addressing related DTCs to resolve the primary issue effectively.

Uploaded by

Shree Kanade
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
3K views2 pages

NOx Sensor Error Troubleshooting

The document outlines the P2BAD-00 DTC code related to NOx sensor exceedance with an unknown root cause, leading to engine de-rating and potential MIL activation. It provides a detailed inspection and troubleshooting guide, including visual checks, error code analysis, and remedial actions. The document emphasizes the importance of addressing related DTCs to resolve the primary issue effectively.

Uploaded by

Shree Kanade
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 2

Component DTC Code Error code description

NOx Sensor P2BAD-00 NOx Exceedance – Root cause unknown

Component location Component view

Error occurring
Effect on the vehicle Probable causes Remedial actions
condition
Error occurs if, • Engine de-rates Relative DTCs - 1. Check for errors in ACM
One or more • Urea quality •P20EE 3. The DTC will only become active when related
fault codes •MIL On •EMS Faulty DTCs are set In order to correct the active DTC,
have been set related DTCs must be corrected first.
for faults in the 4. When the problem is resolved, this DTC will be
exhaust after- . stored as inactive in the control module for 400
treatment. days, it cannot be erased.
6. If problems not solved then change EMS.

Visual inspection (Electrical):

1. Check that the connectors are properly connected and locked into position
2. Disconnect and check the component connector
3. Inspect pins and terminals for oxidations or corrosion
4. Ensure that the pins and terminals are locked into the connectors and that they are not pushed
back out of the sockets
5. Check the pins and terminal are not damaged (which can cause poor connection)
Visual inspection (Mechanical):

1. Check sensor installation position


2. Check dust particles nearby sensor
3. Check proper torqueing of the sensor bolts.
4. Check AdBlue concentration in the fluid. Check Dosing valve & Pump unit.
5. Check the exhaust system.

Inspection using Fault code status check:

A) If there is a Short circuit DTC in the ECU, to identify whether the fault is in wiring harness or the
sensor, disconnect the component connector, (creating open circuit) and re-read fault code
status to see if status changes (where applicable).

o If the fault code changes i.e. open circuit DTC occurs, issue is with the internal circuit of
the component
o If the fault code does not change, issue is with the wiring harness

B) Connect a new sensor with the ECU and check whether the fault gets erased
o If the fault code gets erased, issue is with the internal circuit of the component
o If the fault code does not change, issue is with the wiring harness.

You might also like