{"canonVersion":{"checklist":1,"defects":2},"defectsRelease":{"format":3,"release":"2026.10.1","dossiers":15},"attribution":{"source":"Elgarde","url":"https://elgarde.com","license":"CC-BY-4.0","repository":"https://github.com/ElgardeCom/elgarde"},"disclaimer":"Elgarde is a self-service checklist, not a certified, mechanical or legal inspection and not professional advice. Defect entries are known weak points to check on a model — never a claim about any individual car.","defectsDisclaimer":"Each entry describes a known weak point of a model, engine or gearbox, based on published sources. It is not a statement about any individual car and not a diagnosis. An entry does not mean that a given car has the defect; the absence of an entry does not mean that a car is sound. Prevalence figures are estimates for the stated population and method, with their biases, and cannot be applied to a single car. The data is provided as is, without warranty (CC-BY-4.0, section 5); it is not a certified, mechanical or legal inspection. Naming a manufacturer or its product is not an assessment of that manufacturer; source links show where each fact comes from. To report an error, open an issue at github.com/ElgardeCom/elgarde or write to support@elgarde.com. We correct mistakes.","lang":"en","defect":{"id":"tdi.egr","aliases":[],"revision":1,"updatedAt":"2026-10-13","title":"VW 2.0 TDI (EA189, codes CBEA / CJAA, US-specification): EGR flow fault P0401 with DPF soot, per a Volkswagen service bulletin","summary":"Volkswagen Group of America service bulletin 2034898 (original V011333 of October 2013, revised until November 2021) covers 2.0 TDI cars with engine codes CBEA (2009) and CJAA (2010 to 2014) when the warning light is on with fault P0401 'EGR flow insufficient', possibly with P2463 'DPF soot accumulation'. The bulletin states that high soot loads before a regeneration can cause restrictions in the EGR filter. Where soot is found at the filter connection, it calls for replacing the DPF and the EGR filter together, and says no other parts, including the EGR cooler, need replacing for this fault. It names US-market models only and gives no rate.","checklistPrompt":"EGR / DPF (2.0 TDI CBEA, CJAA) — check EGR flow fault P0401 and soot","component":"engine.emissions.egr","mechanism":"According to Volkswagen's bulletin, high soot loads before a regeneration can cause restrictions in the EGR filter, which is fitted at the diesel particulate filter. The resulting low EGR flow is stored as P0401, sometimes together with P2463 (DPF soot accumulation). The bulletin's diagnosis is to remove the EGR filter from the DPF and wipe the inside of the exhaust pipe at the connection: black soot calls for replacing the DPF and EGR filter together. Because the DPF itself suffers where intake airflow is poor, it also advises checking the intake air filter and the warm air valve. The bulletin does not attribute the fault to driving style.","applicability":{"models":[{"id":"volkswagen.jetta","label":"Volkswagen Jetta"},{"id":"volkswagen.golf","label":"Volkswagen Golf"},{"id":"volkswagen.beetle","label":"Volkswagen Beetle"}],"when":{"any":[{"all":[{"model":["volkswagen.jetta"]},{"engine":{"codes":["CBEA"]}},{"modelYear":{"from":2008,"to":2010}}]},{"all":[{"model":["volkswagen.golf","volkswagen.jetta"]},{"engine":{"codes":["CJAA"]}},{"modelYear":{"from":2009,"to":2015}}]},{"all":[{"model":["volkswagen.beetle"]},{"engine":{"codes":["CJAA"]}},{"modelYear":{"from":2012,"to":2015}}]}]},"markets":["US"],"hint":"Only the bulletin's cars: Jetta and Jetta Wagon 2009 with the 2.0 TDI code CBEA; Golf, Jetta, Jetta SportWagen and Golf Wagon 2010-2014 and Beetle 2013-2014 with code CJAA. Other TDI engines are outside this entry.","notes":"Source is the US bulletin only; the codes CBEA and CJAA belong to the 140 hp EA189 common-rail engine (a press table lists them in the EA189 family), but no European document for this fault was found. The bulletin gives US model years; because the year entered for a car can be its build or registration year, the rule accepts one year on either side of each range. The French RappelConso V2 data contains no recall for EGR or DPF clogging on these engines. The earlier legacy wording about short-trip use is not supported by any official source opened here and is left out."},"engines":[{"id":"vag.ea189_20tdi_140","family":"EA189","codes":["CBEA","CJAA"],"fuel":"diesel","displacementCc":1968,"powerKw":[103],"label":"2.0 TDI common rail 140 hp EA189 (CBEA / CJAA)"}],"gearboxes":[],"severity":"moderate","safety":false,"critical":false,"evidenceGrade":"established","symptoms":[{"id":"s1","text":"Engine warning light on with fault P0401 (EGR flow insufficient)","stage":"early"},{"id":"s2","text":"Fault P2463 (DPF soot accumulation) stored together with P0401","stage":"early"}],"inspection":[{"id":"i1","method":"document","text":"Confirm the engine code (CBEA or CJAA) and the model year against the bulletin's list; ask whether the DPF and EGR filter were ever replaced and whether the control unit software is the latest.","redFlag":null,"tools":[]},{"id":"i2","method":"obd","text":"Read the fault memory for P0401 and P2463.","redFlag":"P0401 or P2463 stored: a DPF and EGR filter replacement may follow.","tools":[]},{"id":"i3","method":"tool","text":"Ask a workshop to remove the EGR filter and wipe the inside of the exhaust pipe at the connection, as the bulletin describes; black soot on the cloth is the bulletin's criterion for replacement.","redFlag":"Black soot at the EGR filter connection.","tools":[]}],"repair":{"remedy":"Replace the DPF and the EGR filter together when soot is found at the EGR filter connection; no other parts (NOx storage catalyst, sulphur catalyst, exhaust flap, EGR cooler) are required for this fault. Then perform the guided adaptation, bring the control unit to the latest software, and check the intake air filter and warm air valve.","cost":null,"worstCase":null,"manufacturerProgramme":{"text":"No recall was identified. Volkswagen published the repair procedure as a service bulletin (versions from October 2013 to November 2021); the bulletin states it is informational only when the car is outside any warranty, and that new software was implemented in production.","evidence":["ev_td_e01","ev_td_e02"]}},"evidence":["ev_td_e01","ev_td_e02","ev_td_e03"],"prevalence":["pv_td_none"],"disclaimer":"Each entry describes a known weak point of a model, engine or gearbox, based on published sources. It is not a statement about any individual car and not a diagnosis. An entry does not mean that a given car has the defect; the absence of an entry does not mean that a car is sound. Prevalence figures are estimates for the stated population and method, with their biases, and cannot be applied to a single car. The data is provided as is, without warranty (CC-BY-4.0, section 5); it is not a certified, mechanical or legal inspection. Naming a manufacturer or its product is not an assessment of that manufacturer; source links show where each fact comes from. To report an error, open an issue at github.com/ElgardeCom/elgarde or write to support@elgarde.com. We correct mistakes."},"evidence":[{"id":"ev_td_e01","type":"tsb","tier":1,"defects":["tdi.egr"],"supports":["existence","mechanism","applicability","inspection","remedy","manufacturer_acknowledgement"],"scope":{"engine":{"codes":["CBEA","CJAA"]},"modelYear":{"from":2009,"to":2014}},"source":{"publisher":"NHTSA (service bulletin of Volkswagen Group of America)","title":"Technical Service Bulletin 01-18-13: MIL ON, DTC P0401 Exhaust Gas Recirculation Flow Insufficient","url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10203454-0001.pdf","identifier":"VW TSB 2034898/20 (01-18-13)","publishedDate":"2021-11-01","retrievedAt":"2026-10-13","language":"en","archive":{"url":"https://web.archive.org/web/20261013103532/https://static.nhtsa.gov/odi/tsbs/2021/MC-10203454-0001.pdf","capturedAt":"2026-10-13","sha256":null},"license":"proprietary","reuse":"cite","status":"archived"},"quote":null,"translation":null,"note":"Volkswagen Group of America bulletin, version of 1 November 2021, for the 2.0 TDI: Jetta and Jetta Wagon 2009 (CBEA), Golf, Jetta, Jetta SportWagen, Golf Wagon 2010-2014 and Beetle 2013-2014 (CJAA). Condition: warning light on, fault P0401 'EGR flow insufficient', possibly with P2463 'DPF soot accumulation'. Background: high soot loads prior to regeneration can cause restrictions in the EGR filter. If soot is found at the EGR filter connection, replace the DPF and the EGR filter together; no other parts (including the EGR cooler) need replacing for this fault; carry out the guided adaptation; check the intake air filter and warm air valve. The bulletin states that it is informational only outside warranty.","confidence":"high","reviewedAt":"2026-10-13","reviewStatus":"source_verified"},{"id":"ev_td_e02","type":"tsb","tier":1,"defects":["tdi.egr"],"supports":["existence","mechanism","applicability","remedy","manufacturer_acknowledgement"],"scope":{"engine":{"codes":["CBEA","CJAA"]},"modelYear":{"from":2009,"to":2014}},"source":{"publisher":"NHTSA (service bulletin of Volkswagen Group of America)","title":"Technical Bulletin 01 14 11: MIL ON, DTC P0401 Exhaust Gas Recirculation Flow Insufficient","url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10241314-9999.pdf","identifier":"VW TSB 2034898 (01 14 11, supersedes V011333 of 23 October 2013)","publishedDate":"2014-04-21","retrievedAt":"2026-10-13","language":"en","archive":{"url":"https://web.archive.org/web/20261013103600/https://static.nhtsa.gov/odi/tsbs/2014/MC-10241314-9999.pdf","capturedAt":"2026-10-13","sha256":null},"license":"proprietary","reuse":"cite","status":"archived"},"quote":null,"translation":null,"note":"Earlier version of the same bulletin (21 April 2014; the original V011333 dates from 23 October 2013): same models, same engine codes, same fault. Background: high soot loads prior to regeneration can cause possible restrictions in the EGR filter. 'Production solution: new software implemented in current production.' Remedy as above: replace the DPF and the EGR filter together when soot is found, then bring the engine control unit to the latest software.","confidence":"high","reviewedAt":"2026-10-13","reviewStatus":"source_verified"},{"id":"ev_td_e03","type":"press","tier":2,"defects":["tdi.egr"],"supports":["applicability"],"scope":null,"source":{"publisher":"Super Express (Grupa ZPR Media)","title":"Lista silnikow TDI o kodzie EA 189 EU5: pelna tabela oznaczen silnikow","url":"https://www.se.pl/auto/porady/silniki-tdi-o-kodzie-ea-189-eu5-niespelniajace-norm-emisji-spalin-lista-silnikow-tabela-oznaczen-aa-Y97J-WwRz-dhH4.html","identifier":null,"publishedDate":"2015-10-07","retrievedAt":"2026-10-13","language":"pl","archive":{"url":"https://web.archive.org/web/20261013103729/https://www.se.pl/auto/porady/silniki-tdi-o-kodzie-ea-189-eu5-niespelniajace-norm-emisji-spalin-lista-silnikow-tabela-oznaczen-aa-Y97J-WwRz-dhH4.html","capturedAt":"2026-10-13","sha256":null},"license":"proprietary","reuse":"cite","status":"archived"},"quote":null,"translation":null,"note":"Press table of EA189 Euro 5 diesel engines (compiled from DailyDriver.pl data): the 2.0 TDI CR of 140 hp (103 kW), 1,968 cc, includes the codes CFHC, CBEA, CBAB, CFFB, CBDB and CJAA. Used only to place CBEA and CJAA in the EA189 family.","confidence":"medium","reviewedAt":"2026-10-13","reviewStatus":"source_verified"}],"prevalence":[{"id":"pv_td_none","kind":"none","value":null,"unit":null,"numerator":null,"denominator":null,"ci":null,"population":null,"outcome":null,"baseline":null,"method":null,"evidence":[],"confidence":null,"caveats":[],"noReliableFigure":true,"reason":"No published figure gives the share of these engines with EGR filter restriction. The Volkswagen bulletin lists affected models and years but is not a count, and no dataset records this fault."}],"attributions":[]}