What it means
The PM sensor on bank 1 cannot acquire a valid exhaust sample - probe fouled, exhaust path obstructed at sensor, or sensor seal leaking.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The particulate matter (PM) sensor on bank 1 samples exhaust so the aftertreatment system can monitor soot emissions. P24DA sets when that sensor cannot obtain a valid sample, which can result from a fouled probe, a restricted sample path, or a leak at its mounting; it does not by itself prove the sensor has failed.
Common causes
Most likely first.
- Particulate matter sensor probe fouled or damaged
- Exhaust sample passage restricted
- Leak at the sensor mounting or seal
- Sensor wiring or connector fault
Symptoms
- Check-engine light on
- Particulate matter sensor or aftertreatment warning
- Emissions inspection failure
How to diagnose it
- Record freeze-frame data and any PM sensor or aftertreatment warnings to see when the bank 1 sample error occurred.
- Inspect the bank 1 PM sensor connector and wiring for looseness, corrosion, heat damage, or chafing.
- Check the sensor mounting and seal for soot tracks or other signs of an exhaust leak at the sampling point.
- Inspect the bank 1 sensor probe and sample passage for fouling, damage, or obstruction, following the vehicle's service procedure.
- If the sample path and seal are clear and sound, check sensor operation and wiring against the manufacturer's specification.
Common fixes
- Repair damaged or poorly connected wiring at the bank 1 PM sensor.
- Correct a leak at the sensor mounting by renewing or correctly seating its seal.
- Clean a serviceable fouled probe or restricted sample passage according to the manufacturer's procedure.
- Replace the bank 1 PM sensor if it is damaged or fails testing.
Can I keep driving?
The fault mainly affects emissions monitoring, so normal driving is generally possible if the vehicle has no other warnings or drivability problems. Avoid ignoring it for long because the emissions fault may cause an inspection failure.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.