What does P2BAC code mean?
P2BAC, NOx Exceedence – Deactivation of EGR. Not much info around on this code. Engine light been on and this code will not erase.
What is NOx Exceedance?
OBD-II Code P2BAC is defined as a nox Exceedence – Deactivation of EGR. The purpose of the reductant system (DEF) is to reduce the amount of NOx released by the diesel engine. The engine computer (PCM) uses multiple NOx sensors to confirm the performance of the reductant system.
How do I fix code P2BAC?
Have a look at some ways with which you can correct the P2BAC code:
- It is essential to restore the flawed NOx sensor.
- Repair or replace the quirky powertrain control module.
- Rehabilitate the defaults in the NOx sensor heater control circuit.
- Carefully adjust the faults in the SCR controller.
- Replacement of faulty EGR valve.
What does fault code P2463 mean?
Diesel Particulate Filter Restriction –
OBD Code P2463 – Diesel Particulate Filter Restriction – Soot Accumulation. When the PCM notices that a lot of soot has accumulated in the diesel particulate filter in the emission control system, OBD code P2463 gets stored in the system.
What are the symptoms of a bad DPF sensor?
Here are some signs that indicate the DPF is not regenerating properly due to the DPF sensor failing:
- Poor engine performance.
- Poor fuel economy.
- High engine temperatures.
- High transmission temperatures.
- An increase in black smoke (soot) from the exhaust.
- Check engine light.
Can a p2bac be displayed with any other code?
A P2BAC should always be accompanied by other exhaust or EGR related codes. The other codes must be diagnosed and repaired before this code is diagnosed, as this code will almost always be rectified by repairing the conditions that caused the other codes to be stored. Obviously, this type of code should be exhibited in diesel powered vehicles only.
Can you repair p2bac with other exhaust codes?
As a point of interest, code P2BAC will always be accompanied by one or more other exhaust system related codes, and repairing these codes will resolve P2BAC as well.
When to deactivate the p2bac in a catalytic converter?
When the PCM detects a level of exhaust pressure that is indicative of an unacceptably high level of NOx (in the DPF, NOx trap, or catalytic converter), the EGR system will be deactivated in order to reduce stress on the affected component and diminish exhaust pressure. In this case, the P2BAC will be stored.
What does p2bac mean on an EGR system?
Note that this code only applies to vehicles that are fitted with EGR systems. It should be noted that code P2BAC is informational in nature, and is set only to alert the driver that the EGR system has been deactivated.