OBD Guide
ENFRDEESPT

P14A6

Diesel Particulate Filter System Flow Resistance Too Low

P14A6 is an OBD-II diagnostic trouble code meaning: Diesel Particulate Filter System Flow Resistance Too Low. Common causes: damaged or missing diesel particulate filter (dpf), leaks in the exhaust system. Estimated repair cost: $56–278.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Check Engine Light Is On
  • Reduced engine power
  • Increased fuel consumption
  • Unusual noises from the exhaust system
  • Noticeable increase in exhaust smoke

Causes

  • Damaged or missing diesel particulate filter (DPF)
  • Leaks in the exhaust system
  • Malfunction of differential pressure sensors
  • Problems with the sensor wiring harness
  • ECU Software Errors

How to Fix

  1. Check the integrity of the particulate filter
  2. Inspect the exhaust system for leaks
  3. Check the operation of the differential pressure sensors
  4. Check wiring harness and sensor connections
  5. Update ECU software if necessary

Related codes

P14A5P14A7P2459

FAQ

What does the P14A6 code mean?

P14A6 is an OBD-II diagnostic trouble code that indicates: Diesel Particulate Filter System Flow Resistance Too Low

What causes a P14A6 error code?

The most common causes of P14A6 include: Damaged or missing diesel particulate filter (DPF); Leaks in the exhaust system; Malfunction of differential pressure sensors; Problems with the sensor wiring harness.

How do I fix a P14A6 diagnostic trouble code?

To fix P14A6: Check the integrity of the particulate filter. Inspect the exhaust system for leaks. Check the operation of the differential pressure sensors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P14A6?

Yes, but get it checked soon

How much does it cost to fix P14A6?

The estimated repair cost for P14A6 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat