P0321 P0322 P0300 VW – Engine Speed Crankshaft Sensor G28 Diagnostics
Diagnostic guide for P0321, P0322, and P0300 on Volkswagen engines. Crankshaft speed sensor G28 thermal failure, engine stalling, and no-signal diagnostics.
Vehicle
VOLKSWAGEN
Codes
3 units
Analysis Type
Technical Expert
Status
Analyzed
Technical Analysis
The combination of P0321, P0322, and P0300 indicates thermal breakdown of the crankshaft speed sensor G28 on VAG engines, cutting ignition and fuel delivery.
Expected Symptoms
System Impact
Potential Fault Sources
Workflow / Methodology
Verify supply voltage and sensor telemetry for P0321, P0322, P0300 on VOLKSWAGEN with multimeter at key ON.
Measure wastegate position feedback voltage at key ON: normal 3.5–3.9 V in closed position.
Smoke-test induction system and boost plumbing at 1.2 bar to pinpoint leaks.
Check crankcase depression with digital manometer at warm idle (-100 to -150 mbar).
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 crankshaft position sensor (G28) and secure wiring harness with heat shielding. 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?
The combination of P0321, P0322, and P0300 indicates thermal breakdown of the crankshaft speed sensor G28 on VAG engines, cutting ignition and fuel delivery.
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 crankshaft position sensor (G28) and secure wiring harness with heat shielding. Clear DTCs.