P2460
Particulate Filter Pressure Sensor B Circuit Low
Auxiliary emissions control (diesel)
Generic OBD-II
Medium
What it means
P2460 means the particulate filter's "B" pressure sensor circuit is reading below its expected voltage range. The engine computer relies on this sensor to measure how restricted the filter is and to time regenerations, so a stuck-low signal usually points to shorted wiring, a bad connector, or a failing sensor rather than an engine fault.
Medium
Can I keep driving? Usually drivable, but the ECM loses an accurate filter-pressure reading and may block regeneration or drop into reduced power if it persists.
Common symptoms
What you'll notice
- Check-engine light on
- Sensor signal reads at or below its low limit
- Failed or skipped DPF regeneration
- Possible reduced-power / limp mode if it repeats
Common causes
Most likely first
- Signal wire shorted to ground or to the sensor returnLikely
- Loose or corroded connector at the 'B' particulate filter pressure sensorCommon
- Failing differential-pressure sensor reading lowCommon
- Open or high-resistance 5-volt reference feed to the sensorLess often
- Blocked or disconnected pressure hose holding the reading lowLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm which bank/sensor the 'B' circuit refers to on this vehicle.
- Inspect the sensor connector and wiring for a short to ground, chafing, or corrosion.
- Verify the 5-volt reference and ground are present at the sensor connector.
- Compare the sensor's live reading to a known-good value; a stuck-low signal points to the sensor or its hose.
- Repair wiring or replace the sensor as needed, then clear and road-test through a regen cycle.
FAQ
Quick answers
Is it safe to drive with P2460?+
Usually for a short time, but the filter's self-cleaning regen may be disabled, which can lead to a clogged filter and reduced power if ignored.
Can I just clear P2460?+
It will return until the low-reading wiring fault or failed sensor is repaired. Fix the circuit first, then clear.
Related codes
Often seen with P2460
Read & clear P2460 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX