P0341 on a GMC: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

You can usually keep driving a GMC with P0341, but rough idle or hard starting is possible, so get it checked soon.

What P0341 means on a GMC

On a GMC, P0341 means the engine computer sees a camshaft position signal from bank 1 that is outside the expected range. The sensor helps time fuel and ignition, and on V8 models it works with the cylinder deactivation system. When the reading drifts, you may get a rough idle, poor fuel economy, or a hard start.

Is P0341 common on GMCs?

P0341 shows up on GMC trucks and SUVs with 5.3L and 6.2L V8 engines as the cam sensors age or the wiring gets damaged. Oil contamination in the connector is also a common pattern on this brand. It tends to appear on higher-mileage vehicles.

Commonly reported on: Sierra, Yukon, Terrain, Acadia.

Symptoms

Check engine light on
Rough idle or hesitation
Hard starting
Reduced fuel economy in some cases

Common causes

most common: Faulty camshaft position sensor
common: Oil or debris in the sensor connector
common: Damaged or chafed wiring
less common: Worn timing chain or cam phaser parts

How to fix it

Fix	DIY?	Typical cost
Inspect the cam sensor connector and wiring	Yes	$10–60
Replace the camshaft position sensor	Yes	$100–250
Have the timing components checked if the code returns	Mechanic	$700–2000