P2452 P2453 P2002 VW 2.0 TDI – DPF Differential Pressure Sensor Diagnostics
Diagnostic guide for P2452, P2453, and P2002 on Volkswagen TDI engines. Faulty G450 differential pressure sensor, melted pressure lines, and DPF soot accumulation.
Vehicle
VOLKSWAGEN
Codes
3 units
Analysis Type
Technical Expert
Status
Analyzed
Technical Analysis
The combination of P2452, P2453, and P2002 represents DPF pressure sensor failure on VAG TDI engines. Sensor G450 fails or sensing hoses melt, blocking regeneration and accumulating soot.
Expected Symptoms
System Impact
Potential Fault Sources
Workflow / Methodology
Verify supply voltage and sensor telemetry for P2452, P2453, P2002 on VOLKSWAGEN 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 |
|---|---|---|---|
| Differenstryck DPF (G450) | Tomgång (motor >80°C) | 3 – 8 mbar | > 15 mbar (Mottrycksavvikelse) |
| Differenstryck DPF (G450) | 2 500 rpm (stillastående) | 25 – 65 mbar | > 90 mbar (Begynnande igensättning) |
| Beräknad sotmängd | Drift | 0 – 24.0 g | > 24.0 g (Serviceregenerering spärrad) |
Assessment & Action Proposal
Technical Recommendation
Install a new genuine G450 differential pressure sensor, replace damaged hoses, perform sensor adaptation in the ECU, and initiate forced DPF regeneration. Clear DTCs.
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Start Fault Code AnalyzerVanliga frågor om dessa felkoder
Vad är den primära orsaken till felkoderna?
The combination of P2452, P2453, and P2002 represents DPF pressure sensor failure on VAG TDI engines. Sensor G450 fails or sensing hoses melt, blocking regeneration and accumulating soot.
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 G450 differential pressure sensor, replace damaged hoses, perform sensor adaptation in the ECU, and initiate forced DPF regeneration. Clear DTCs.