P0343 Camshaft Position Sensor A Circuit High Input (Bank 1 or Single Sensor)

P0343 indicates a high input from camshaft position sensor A on bank 1 or a single-sensor setup. The signal is higher than expected or stuck high.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System
Ignition / Misfire
Scope
iso-sae-controlled-p0
Standard
SAE J2012 / ISO 15031-6
Source
legacy-import

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace the module or sensor before checking signal wiring; a shorted harness can create a high-input cam code.

Useful checks before replacing parts

Related OBD-II codes

These nearby ignition / misfire entries can help compare wording and fault area. They may share the same verification status as the source database.