P0018 on Buick
Crankshaft/Camshaft Position Correlation - Bank 2 Sensor A
P0018 on Buick vehicles indicates crankshaft/camshaft position correlation - bank 2 sensor a. Au7o has documented this code across 1 Buick model — most commonly on Enclave. This code means the computer detected that the crankshaft and the Bank 2 'A' (typically intake) camshaft are out of their expected timing relationship. The computer compares the crankshaft and camshaft position sensor signals; they should stay in a fixed correlation as the engine turns. When the Bank 2 camshaft is too far off from the crankshaft, P0018 sets, indicating the valve timing on that bank is misaligned. This can cause rough running, reduced power, hard starting, or a no-start, and in some cases signals timing chain or phaser trouble that warrants prompt attention.
Common Causes of P0018
- •Stretched, worn, or jumped timing chain (Bank 2)
- •Worn or broken timing chain guides/tensioner
- •Stuck variable valve timing solenoid or phaser
- •Low or dirty engine oil affecting the phaser
- •Faulty crankshaft or camshaft position sensor
- •Damaged reluctor/tone ring
- •Incorrect timing from prior service
- •Wiring or connector fault at a cam/crank sensor
P0018 on Buick by Model
Buick Enclave(1 issue)
- Cylinder-Head Porosity Can Contaminate Engine Oil (PIP5674)2019
GM PIP5674 applies to 2019 Enclave vehicles with the 3.6L LFY engine. Internal porosity near an outer cylinder-head bolt area can allow coolant to contaminate the engine oil, producing a ticking noise, coolant loss, very dark or sticky oil and a check-engine light with cam/crank correlation codes even at low mileage.
Looking for P0018 on a different make?
View P0018 across all makes →Frequently Asked Questions
What does P0018 mean on Buick?▼
P0018 stands for "Crankshaft/Camshaft Position Correlation - Bank 2 Sensor A." This code means the computer detected that the crankshaft and the Bank 2 'A' (typically intake) camshaft are out of their expected timing relationship. The computer compares the crankshaft and camshaft position sensor signals; they should stay in a fixed correlation as the engine turns. When the Bank 2 camshaft is too far off from the crankshaft, P0018 sets, indicating the valve timing on that bank is misaligned. This can cause rough running, reduced power, hard starting, or a no-start, and in some cases signals timing chain or phaser trouble that warrants prompt attention. On Buick specifically, this code is documented across 1 model.
What causes P0018 on Buick vehicles?▼
Common causes on Buick: Stretched, worn, or jumped timing chain (Bank 2), Worn or broken timing chain guides/tensioner, Stuck variable valve timing solenoid or phaser, Low or dirty engine oil affecting the phaser, Faulty crankshaft or camshaft position sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0018 on a Buick?▼
Repair costs vary widely depending on the root cause and specific Buick model.
Which Buick models have P0018 documented?▼
Au7o has documented P0018 on 1 Buick model: Enclave.