What does a p2bac NOx exceedance code mean?
What does a p2bac NOx exceedance code mean?
When this code is stored, it means that the PCM has detected a level of nitrogen oxide (NOx) that exceeds a programmed limit. This detection may have taken place in the NOx trap or the diesel particulate filter (DPF). It may also be due to a defective DPF pressure sensor or NOx sensor.
How does the NOx Trap work in a p2bac system?
The NOx trap is another in-line exhaust component that catches NOx particles and must be rejuvenated regularly. Just like with the DPF, if the NOx trap isn’t rejuvenated regularly, exhaust pressure is elevated and a NOx trap code will be stored. Also like the DPF system, a code P2BAC may also accompany NOx system codes.
Can a p2bac be repaired on an O2 sensor?
In these vehicles, the P2BAC usually accompanies an O2 sensor code. Diagnose and repair the O2 sensor code and the P2BAC will literally disappear.
Can a p2bac cel be cleared for NOx / EGR?
Went and cleared the CEL. Then a day later the CeL came back on for the P2bac. Drove it for another week with no issues, checked the codes again and now have a p2271 with the P2bac. http://www.ttnews.com/articles/polluting-parts-force-us-recall-500000-trucks-cummins-engines
When this code is stored, it means that the PCM has detected a level of nitrogen oxide (NOx) that exceeds a programmed limit. This detection may have taken place in the NOx trap or the diesel particulate filter (DPF). It may also be due to a defective DPF pressure sensor or NOx sensor.
The NOx trap is another in-line exhaust component that catches NOx particles and must be rejuvenated regularly. Just like with the DPF, if the NOx trap isn’t rejuvenated regularly, exhaust pressure is elevated and a NOx trap code will be stored. Also like the DPF system, a code P2BAC may also accompany NOx system codes.
When to use the OBD 2 fault code p2bac?
OBD II fault code P2BAC is a generic code that is defined as “NOx Exceedence – Deactivation of EGR”, and is set when the PCM (Powertrain Control Module) detects that the levels of NOx (oxides of nitrogen) in the exhaust gas exceeds a maximum allowable threshold as the a result of the EGR (Exhaust Gas Recirculation) system being deactivated.
Went and cleared the CEL. Then a day later the CeL came back on for the P2bac. Drove it for another week with no issues, checked the codes again and now have a p2271 with the P2bac. http://www.ttnews.com/articles/polluting-parts-force-us-recall-500000-trucks-cummins-engines
