P0018 on Saturn
Crankshaft/Camshaft Position Correlation - Bank 2 Sensor A
P0018 on Saturn vehicles indicates crankshaft/camshaft position correlation - bank 2 sensor a. Au7o has documented this code across 2 Saturn models — most commonly on Aura, Vue. 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. Typical repair costs on Saturn range from $1,500 to $3,500, depending on the specific model and root cause.
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 Saturn by Model
Saturn Aura(1 issue)
- 3.6L V6 (LY7) Stretched Timing Chains2007-2009
The early GM 3.6L high-feature V6 (used in Aura XR) is prone to premature timing chain stretch, sometimes appearing as early as 50,000-100,000 miles. As the chains wear, camshaft-to-crankshaft timing drifts out of spec, setting correlation codes and eventually causing rough running, reduced power, and potential engine damage if ignored. A cold-start rattle is a common early warning sign.
Saturn Vue(1 issue)
- 3.6L High Feature V6 (LY7) Timing Chain Stretch2008-2010
The 3.6L 'High Feature' V6 used in the redesigned 2008-2010 Vue (and shared with Aura/Outlook/Acadia/CTS) is prone to timing chain stretch, often aggravated by extended oil-change intervals. As the chains and plastic guides wear, cam/crank timing drifts out of correlation, triggering the check-engine light, rough running, and a rattle on cold start. GM issued Information Bulletin 12-06-01-009F covering timing chain kit and guide replacement for DTCs P0008/P0009/P0016/P0017/P0018/P0019.
Looking for P0018 on a different make?
View P0018 across all makes →Frequently Asked Questions
What does P0018 mean on Saturn?▼
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 Saturn specifically, this code is documented across 2 models.
What causes P0018 on Saturn vehicles?▼
Common causes on Saturn: 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 Saturn?▼
Repair costs on Saturn range from $1,500 to $3,500, depending on the specific model and root cause.
Which Saturn models have P0018 documented?▼
Au7o has documented P0018 on 2 Saturn models: Aura, Vue.