P242A P0544 Audi 3.0 TDI V6 – Exhaust Gas Temperature Sensor Diagnostics
Diagnostic guide for P242A and P0544 on Audi/VW 3.0 TDI V6. Faulty EGT sensor 1 (G235) and sensor 3 (G495), open circuits, and DPF regen blocks.
Vehicle
AUDI
Codes
2 units
Analysis Type
Technical Expert
Status
Analyzed
Technical Analysis
Fault codes P242A and P0544 indicate thermal breakdown of exhaust gas temperature sensors G235 (pre-turbo) and G495 (pre-DPF) on VAG 3.0 TDI V6 engines, blocking active DPF regeneration.
Expected Symptoms
System Impact
Potential Fault Sources
Workflow / Methodology
Verify supply voltage and sensor telemetry for P242A, P0544 on AUDI with multimeter at key ON.
Check DPF differential pressure with key ON: must read precisely 0 hPa (0.48–0.52 V).
Query calculated soot mass and oil ash volume in ECM live data blocks.
Execute service regeneration cycle under load following sensor replacement.
Live Data & Mätvärdestoleranser (Är/Bör-värden)
Fabriksgodkända referensvärden vid diagnos och live-avläsning
| Parameter / Signal | Testvillkor | Bör-värde (Normalt) | Avvikelse / Varning |
|---|---|---|---|
| Givarreferensspänning | Tändning på | 4.95 – 5.05 V | < 4.75 V (Kortslutning/Spänningsfall) |
| Signalretur tomgång | Driftstemperatur | Inom fabriksintervall ±5% | Signalkorruption el avbrott |
Assessment & Action Proposal
Technical Recommendation
Install a new genuine exhaust gas temperature sensor (G235/G495) with anti-seize paste on threads. Clear DTCs.
Need a deeper analysis? Use our advanced fault code analyzer to find likely connections and in-depth guidance.
Start Fault Code AnalyzerVanliga frågor om dessa felkoder
Vad är den primära orsaken till felkoderna?
Fault codes P242A and P0544 indicate thermal breakdown of exhaust gas temperature sensors G235 (pre-turbo) and G495 (pre-DPF) on VAG 3.0 TDI V6 engines, blocking active DPF regeneration.
Kan man köra vidare med tänd motorlampa / varningslampa?
Körning med aktiva felkoder kan leda till strypt motoreffekt (nödläge / Limp Home), blockerad partikelfilterregenerering eller följdskador på mekaniska komponenter. Felsökning bör genomföras omgående.
Hur åtgärdas kombinationen på säkrast sätt?
Install a new genuine exhaust gas temperature sensor (G235/G495) with anti-seize paste on threads. Clear DTCs.