P0341Camshaft position (CMP) sensor A range or performance

Means camshaft position sensor A is present but not telling a believable story: the ECM sees a signal that is intermittent, out of sync with the crank, or fails the range/performance window rather than a hard open-circuit dead line. Drivers get a check-engine light, hard or extended cranking, rough running until sync returns, and sometimes a no-start when cam/crank correlation is lost under heat. Freeze frame often catches a hot restart or tip-in where CMP count or correlation drifts while CKP looks healthy.

Shop frequency starts with a failing CMP sensor that drops out when hot, then a stretched or jumped timing chain/belt that shifts cam relative to crank, then tone-wheel debris or a damaged reluctor after front-cover work. Next: oil-soaked connector, wrong air gap after sensor replacement, chafed harness at the valve cover, or rare ECM input faults. Do not confuse range/performance with a pure P0340 circuit code—P0341 is about correlation and signal quality, not only a wire that went open.

Diagnosis: graph CMP and CKP together during crank and hot idle; a healthy pair rises in fixed relationship. Note whether the fault prefers hot soak—classic weak sensor. Inspect timing marks or use OEM cam/crank correlation PIDs and Mode $06 where available before condemning the sensor alone. Check connector oil intrusion and pin tension. Replace the CMP when wiring and timing correlation prove the sensor is the liar. Dig elsewhere when a new sensor still fails with chain stretch evidence, when multiple bank cam sensors fail together (shared power/ground), or when mechanical timing was disturbed and never rechecked. System context: CMP feeds sequential injection, VVT enable, and spark sync—bad performance costs startability and can disable variable cam control. Prove sync before ordering a cam phaser.