Powertrain, generic (extended)

P226E Particulate Filter Deteriorated/Missing Substrate (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P226E reports a damaged or missing particulate filter core on bank 2, which only exists where each cylinder bank has its own filter. Ford documents it in its 2024-2025 OBD summary for petrol engines: the gasoline particulate filter check runs once the filter has been above 250 °C for 30 s and exhaust flow lies between 300 and 850 m³/h; if the lowest measured back pressure stays below the missing-brick threshold, a ratio under 1.0, for 5 s, P226E is stored for bank 2 and P226D for bank 1, with Mode 6 results under monitor ID $B3. No public bulletin covers P226E. CARB's missing-substrate rule for diesels follows the same idea. A pressure line problem can mimic a missing core, so check lines and sensor before condemning the filter.

Likely causes

Bank 2 filter core cracked, melted or removed
Pressure sensing line of bank 2 loose, cracked or blocked
Back pressure sensor reading too low

Symptoms

  • MIL on
  • Usually no noticeable change in driving behaviour

Repair estimate

DifficultyHardWorkshop job
Parts and labour€50–3,000
Time0.5–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

diesel particulate filter

Related codes

P226DP2003P243B

References: fordservicecontent.com, law.cornell.edu, gsi.ext.gm.com.