P242F on SEAT
Diesel Particulate Filter Restriction - Ash Accumulation (Bank 1)
P242F on SEAT vehicles indicates diesel particulate filter restriction - ash accumulation (bank 1). Au7o has documented this code across 2 SEAT models — most commonly on Ibiza, Leon. P242F is a generic diesel emissions code indicating the engine control module has detected excessive restriction in the Diesel Particulate Filter (DPF) caused by ash accumulation rather than recoverable soot. Unlike soot, ash cannot be burned off through normal or forced regeneration, so this typically signals the DPF is reaching the end of its service life and needs cleaning or replacement. The condition reduces exhaust flow and can trigger reduced-power (limp) mode if left unaddressed. Typical repair costs on SEAT range from $200 to $1,500, depending on the specific model and root cause.
Common Causes of P242F
- •DPF at end of service life with accumulated non-combustible ash from engine oil additives
- •Excessive oil consumption (worn rings/valve seals) loading the filter with ash
- •Use of non-low-ash (non-CJ-4/low-SAPS) engine oil
- •Repeated incomplete or failed regeneration cycles over time
- •Faulty DPF differential pressure sensor giving high restriction readings
- •Clogged or saturated DPF substrate requiring professional cleaning or replacement
P242F on SEAT by Model
SEAT Ibiza(1 issue)
- Diesel Particulate Filter (DPF) Clogging on TDI Diesels2009-2016
The TDI diesel Ibizas (notably the 1.2 TDI/1.6 TDI Ecomotive) suffer DPF clogging, especially when used predominantly for short urban journeys that never reach regeneration temperature. Incomplete or repeated active regenerations dilute the engine oil with diesel (raising the oil level), which can in turn accelerate engine wear. Symptoms include a DPF/glow-plug warning light, limp mode, increased fuel consumption and a smell of diesel in the oil. The problem is well documented on owner forums and Q&A sites for the Ibiza ST Ecomotive.
SEAT Leon(1 issue)
- EA189 TDI Diesel: EGR/DPF Clogging and Post-Dieselgate Oil Dilution2009-2015
Diesel Leons (1.6 TDI and 2.0 TDI) using the EA189 engine - the engine at the centre of the Dieselgate emissions scandal - are widely reported for EGR valve and EGR-cooler clogging with soot and DPF (diesel particulate filter) blockages, especially on short-trip/urban driving that prevents the filter reaching regeneration temperature. After the mandated emissions 'fix', many owners additionally reported worsened DPF behaviour and oil dilution (diesel washing into the sump during frequent active regens), requiring more frequent oil changes.
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View P242F across all makes →Frequently Asked Questions
What does P242F mean on SEAT?▼
P242F stands for "Diesel Particulate Filter Restriction - Ash Accumulation (Bank 1)." P242F is a generic diesel emissions code indicating the engine control module has detected excessive restriction in the Diesel Particulate Filter (DPF) caused by ash accumulation rather than recoverable soot. Unlike soot, ash cannot be burned off through normal or forced regeneration, so this typically signals the DPF is reaching the end of its service life and needs cleaning or replacement. The condition reduces exhaust flow and can trigger reduced-power (limp) mode if left unaddressed. On SEAT specifically, this code is documented across 2 models.
What causes P242F on SEAT vehicles?▼
Common causes on SEAT: DPF at end of service life with accumulated non-combustible ash from engine oil additives, Excessive oil consumption (worn rings/valve seals) loading the filter with ash, Use of non-low-ash (non-CJ-4/low-SAPS) engine oil, Repeated incomplete or failed regeneration cycles over time, Faulty DPF differential pressure sensor giving high restriction readings. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P242F on a SEAT?▼
Repair costs on SEAT range from $200 to $1,500, depending on the specific model and root cause.
Which SEAT models have P242F documented?▼
Au7o has documented P242F on 2 SEAT models: Ibiza, Leon.