Diagnostic article Generic OBD-II
P0322: missing G28 speed signal and the connected wiring path
P0322 in Ross-Tech's VAG reference concerns missing engine-speed feedback from G28, with sensor and wiring-path evidence needed to explain it.
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Documented application
Ross-Tech independent VAG diagnostic guidance; match complete fault description and controller. Vehicle-specific notes do not establish universal applicability.
The code alone does not identify a failed part or establish that a vehicle is safe to drive. Confirm the vehicle, reporting module and applicable service procedure.
P0322 is the no-signal fault for engine-speed sensor G28 in Ross-Tech's VAG reference. The page associates it with stalling, a no-start, an inoperative tachometer and a flashing glow-plug indicator. These are possible effects of missing speed information, not guarantees that every listed symptom will occur.
No signal is the important finding
G28 provides the crankshaft reference used alongside camshaft information. The source names a loose or faulty sensor as possible causes. A useful diagnostic conclusion should therefore explain why the controller is not receiving usable G28 information rather than infer failure from an unrelated dashboard symptom.
Contamination may extend along the harness
Ross-Tech notes oil or coolant migration through wiring toward the engine control module, with a Tiguan example. As editorial diagnostic reasoning, evidence of fluid at a connector warrants consideration of the connected path rather than assuming the sensor housing is the complete problem. The example does not establish a universal Tiguan defect or require replacing the module.
The reference supplies no model-independent connector pinout, waveform specification or sensor mounting procedure. Confirm the actual engine and circuit before testing. This article describes Ross-Tech's independent VAG interpretation of the missing-signal fault; the applicable manufacturer's repair information determines how that evidence is measured and which repair is justified.
Article source documents
Source checks describe how the text was prepared; they do not certify a diagnosis or confirm compatibility with every vehicle using this code.
Original code reference
Dictionary definition
Ignition/Distributor Engine Speed Input Circuit No Signal
This definition retains its original catalog scope. The article above is limited to its explicitly documented application.
Reference scope
Generic OBD-II definition.
A manufacturer label does not establish the model, year, engine or module to which a diagnosis applies. Read the safety and diagnostic limits.
Definition source
- DTC Database: pinned community code definitions
Source checked · MIT