How severe is this DTC?
The severity will be moderately high here. When reading this, a certain sense of urgency should be applied to maintain effective engine operation. Whenever a fault can directly affect critical values such as air/fuel ratios and is actively present, you should not operate your vehicle to avoid engine damage. That said, if you’ve driven the vehicle since the fault became active, don’t worry too much, you’re probably fine. Key takeaway: if left unaddressed, this fault could lead to costly internal engine damage in the future.
What are some symptoms of the code?
Symptoms of a P2226 trouble code may include:
- Lack of engine power and performance (or limited)
- Engine misfire
- Abnormal engine noise(s)
- Fuel odor
- Decreased fuel economy
- Reduced throttle responsiveness
What are some common causes of the code?
Causes of this P2226 code may include:
- Faulty or damaged BAP (Barometric Air Pressure) sensor
- Faulty or damaged electrical connector
- Wiring issue (e.g., open circuit, short circuit, corrosion)
- Electrical short (internal or mechanical)
- Loose electrical connection
- Heat damage
- Mechanical malfunction causing altered BAP readings
- ECM (Engine Control Module) problem
What are the troubleshooting steps for P2226?
Basic Step #1
Locate the BAP (Barometric Air Pressure) sensor on your specific vehicle. The location of these sensors has varied significantly in my experience, so finding the correct sensor should be of utmost importance. Once located, inspect the BAP sensor for any physical damage. Potential issues may depend on the location, so consider the sensor’s environment (i.e., high-heat areas, engine vibrations, exposure to elements/road debris, etc.).
Basic Step #2
Ensure the sensor connector itself is properly installed to maintain a good electrical connection. Especially if the sensor is located on the engine, it may be subject to vibrations that could loosen connections or cause physical damage.
NOTE: Remember to disconnect your battery before disconnecting sensors. Depending on the vehicle/system/sensor, you could cause damaging electrical spikes if you forget this step. That said, if you feel uncomfortable here or have limited basic electrical knowledge, I recommend towing/driving your vehicle to your trusted repair center.
Basic Step #3
Is something obstructing the sensor? This could cause false atmospheric pressure readings. Accurate readings are integral to optimal engine performance in these fuel management systems.
Basic Step #4
Using your multimeter and armed with the desired electrical values for the barometric air pressure sensor. You’ll need to disconnect the sensor connector itself to access the pins. Once you see the pins, follow manufacturer-specific diagnostic procedures with the desired values and compare. Anything outside the specified range will indicate a faulty sensor. Replace it following proper removal and reinstallation procedures.