Zum Inhalt springen
VOLKSWAGEN
P0321
P0322
P0300

P0321 P0322 P0300 VW – Engine Speed Crankshaft Sensor G28 Diagnostics

Diagnose-Priorität: Hoch
Komplexitätsgrad: Fortgeschritten

Diagnostic guide for P0321, P0322, and P0300 on Volkswagen engines. Crankshaft speed sensor G28 thermal failure, engine stalling, and no-signal diagnostics.

Fahrzeug

VOLKSWAGEN

Codes

3 Steuergeräte

Analysetyp

Technischer Experte

Status

Analysiert

Technische Analyse

REF: #3DAC0E

The combination of P0321, P0322, and P0300 indicates thermal breakdown of the crankshaft speed sensor G28 on VAG engines, cutting ignition and fuel delivery.

Erwartete Symptome

Check engine light illuminated with sudden boost drop under hard acceleration on VOLKSWAGEN (DTCs: P0321, P0322, P0300)
Rough idle and sluggish throttle pickup from a dead stop
Misfiring and hesitation during high-speed highway overtaking (2,500–3,500 RPM)

Systemauswirkungen

Antriebsstrang
Motorsteuerung
Abgasreinigung

Mögliche Fehlerursachen

01Sticking electronic wastegate actuator or heavy carbon buildup on intake valves (affecting VOLKSWAGEN subsystem for P0321, P0322, P0300)
02Boost control solenoid N75 leakage or split charge air hose
03Ruptured diaphragm in PCV oil separator assembly (logged fault: P0321)

Vorgehensweise / Methodik

01

Verify supply voltage and sensor telemetry for P0321, P0322, P0300 on VOLKSWAGEN with multimeter at key ON.

02

Measure wastegate position feedback voltage at key ON: normal 3.5–3.9 V in closed position.

03

Smoke-test induction system and boost plumbing at 1.2 bar to pinpoint leaks.

04

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

Mätvärdesblock
Parameter / SignalTestvillkorBör-värde (Normalt)Avvikelse / Varning
GivarreferensspänningTändning på4.95 – 5.05 V< 4.75 V (Kortslutning/Spänningsfall)
Signalretur tomgångDriftstemperaturInom fabriksintervall ±5%Signalkorruption el avbrott

Bewertung & Handlungsempfehlung

Technische Empfehlung

Install a new genuine crankshaft position sensor (G28) and secure wiring harness with heat shielding. Clear DTCs.

Benötigen Sie eine tiefere Analyse? Nutzen Sie unseren erweiterten Fehlercode-Analysator, um wahrscheinliche Zusammenhänge aufzudecken.

Fehlercode-Analysator starten

Vanliga 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.