P0366 on Buick
Camshaft Position Sensor "B" Circuit Range/Performance (Bank 1)
P0366 on Buick vehicles indicates camshaft position sensor "b" circuit range/performance (bank 1). Au7o has documented this code across 1 Buick model — most commonly on Encore. This code indicates the 'B' camshaft position sensor on Bank 1 is electrically present but its signal is out of the expected range or inconsistent with the crankshaft position signal. The PCM uses this sensor to track camshaft timing for fuel, spark, and variable valve timing control. A range/performance fault can cause rough idle, hesitation, reduced power, or hard starting. It often points to sensor or timing alignment issues rather than a fully open circuit.
Common Causes of P0366
- •Failing camshaft position sensor (Bank 1, sensor B)
- •Damaged reluctor/tone ring or excessive air gap
- •Timing chain/belt stretch or jumped timing
- •Wiring/connector intermittent fault or corrosion
- •Oil contamination on the sensor
- •Variable valve timing actuator fault
P0366 on Buick by Model
Buick Encore(1 issue)
- Exhaust Camshaft Reluctor Can Move Out of Phase (21-NA-268)2016-2022
GM Bulletin 21-NA-268 applies to 2016-2022 Buick Encore vehicles with the 1.4L LE2 engine. An exhaust-camshaft reluctor that moves out of phase can cause an extended crank or crank/no-start condition, illuminate the MIL and, in some cases, increase brake-pedal effort. The vacuum-pump drive lugs may also be damaged.
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View P0366 across all makes →Frequently Asked Questions
What does P0366 mean on Buick?▼
P0366 stands for "Camshaft Position Sensor "B" Circuit Range/Performance (Bank 1)." This code indicates the 'B' camshaft position sensor on Bank 1 is electrically present but its signal is out of the expected range or inconsistent with the crankshaft position signal. The PCM uses this sensor to track camshaft timing for fuel, spark, and variable valve timing control. A range/performance fault can cause rough idle, hesitation, reduced power, or hard starting. It often points to sensor or timing alignment issues rather than a fully open circuit. On Buick specifically, this code is documented across 1 model.
What causes P0366 on Buick vehicles?▼
Common causes on Buick: Failing camshaft position sensor (Bank 1, sensor B), Damaged reluctor/tone ring or excessive air gap, Timing chain/belt stretch or jumped timing, Wiring/connector intermittent fault or corrosion, Oil contamination on the sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0366 on a Buick?▼
Repair costs vary widely depending on the root cause and specific Buick model.
Which Buick models have P0366 documented?▼
Au7o has documented P0366 on 1 Buick model: Encore.