What Does the Engine Code P2BA8 Mean?

Let Jerry pay for your car repair by saving you money on car insurance
No long forms · No spam · No fees
Find insurance savings (100% Free)
WHY YOU CAN TRUST JERRY
Jerry partners with more than 50 insurance companies, but our content is independently researched, written, and fact-checked by our team of editors and agents. We aren’t paid for reviews or other content.
If the P2BA8 engine code is displayed on your car’s dashboard, there’s a problem with your Nox sensors. This code will cause your car to go limp and should be fixed promptly to keep your car operating.
There are over 5,000 diagnostic trouble codes that detect and indicate an issue with your vehicle. If your car is displaying a diagnostic trouble code, you need to understand what the engine code means so you can properly diagnose the problem, assess the urgency, and fix it.
That’s why the price comparison and car insurance broker app Jerry has found everything you need to know about the P2BA8 engine code—from what it means, how to deal with it, and how much it costs to fix.

What does the engine code P2BA8 mean?

Definition: NOx Exceedence–Interruption of Reagent Dosing Activity
Engine code P2BA8 indicates an issue with the NOx sensors. These sensors are responsible for monitoring the level of nitrogen oxide being emitted by your diesel vehicle. 

How much will it cost to fix?

If you need to replace the NOx sensors in your car, the total cost of parts and labor could be between $120 and $500 depending on the vehicle you drive.

What can cause the P2BA8 engine code?

If your car is displaying the P2BA8 engine code, you have a faulty diesel particulate filter (DPF), but more likely there’s a problem with your NOx sensors.
Here are the issues with your NOx sensors that could cause the P2BA8 engine code:
  • Faulty NOx sensors
  • The NOx sensors harness is open or shorted
  • Poor electrical circuit connection

Common symptoms of the P2BA8 engine code

You may not be able to see symptoms accompanying the P2BA8 engine code other than a lit check engine light. You may notice other symptoms:
  • Increased fuel consumption
  • Erratic idling
  • Pinging or thumping noise from the engine
  • Your vehicle may go into “limp” mode
If your NOx sensor is faulty, you might also experience jerkiness or your engine will misfire while driving.
Let Jerry find your price in only 45 seconds
No spam · No long forms · No fees
Find insurance savings (100% Free)

How serious is the P2BA8 engine code?

The P2BA8 engine code affects your car’s driveability and should be dealt with promptly.
Take your car to a mechanic to have your NOx sensors inspected, repaired, or replaced before your car goes into limp mode or fails an emissions test.

Can I fix the P2BA8 engine code myself?

If you plan to fix the P2BA8 engine code yourself, it’s important to properly diagnose the code before you attempt repairs at home. You should inspect the wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connectors’ pins.
Depending on the source of the problem you may need to replace the:
  • Air intake pipe
  • Intake manifold valve
  • Wiring connections to the Mass Air Flow sensors
  • NOx sensors
If you are not sure what repairs your car needs to fix the P2BA8 engine code, you should take it to a professional for diagnostic inspection and repairs.

Replacing the NOx sensors

Once properly diagnosed and you decide to fix the P2BA8 engine code yourself, you can follow these steps to replace the NOx sensors yourself:
  • Remove the NOx sensors 
  • Pull back the protective rubber to gain access to the sensor cables
  • Split the sensor cables using a knife or scissors
  • Connect the corresponding color-coded cables of the new NOx sensor to the emission control unit
Once you’ve installed the NOx sensor, test drive your car and monitor your dashboard for fuel levels. 

Finding insurance for your vehicle

Car repairs can be an expensive part of car ownership. Cut car insurance costs and save money with Jerry.
If you want cheap car insurance without sacrificing coverage, the Jerry app is a good place to start. A licensed broker, Jerry does all the hard work of finding cheap quotes from the top name-brand insurance companies and buying new car insurance. They even help cancel your old policy! So why do all that extra work when Jerry can do it better?
 “A seamless process and a fantastic app! Jerry saved me over $2000 on car insurance. I would recommend it to anyone and everyone.” —Osvaldo B.
kemper logo
Rating
Jerry Rating
See rates
nationwide logo
Rating
Jerry Rating
See rates
progressive logo
Rating
Jerry Rating
See rates
travelers logo
Rating
Jerry Rating
See rates

Easiest way to compare and buy car insurance

√
No long forms
√
No spam or unwanted phone calls
√
Quotes from top insurance companies
Find insurance savings — it's 100% free