P0340 on Saturn: How to Diagnose & Fix
Camshaft Position Sensor Circuit Malfunction
1 Saturn model · 1 documented issue · 1 critical · $600-$1,500 repair
P0340 on Saturn by model: symptoms, diagnosis and fix
2004-2007 Saturn Vue V6 used the Honda 3.5L J35 V6 (sourced from Honda) — same engine as the Honda Pilot/Odyssey/MDX. It uses a timing belt with a recommended replacement interval of 100,000 miles (or 7 years). Interference engine: failure to replace the belt risks catastrophic valve damage. Water pump should be replaced at the same time.
Common Symptoms
- timing belt chirping
- whine from front of engine
- oil leak at front
- service due
How to Fix
Full timing belt + water pump + tensioner + idler service kit ($600-$1,000 at independent). Use OEM Honda or quality aftermarket Gates/Aisin parts. Do NOT exceed the interval — this is an interference design. Some owners replaced at 90,000 miles for extra margin.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- AISIN TKH-002 timing-belt and water-pump kit
Not for the 2.2L/2.4L four-cylinder, 2002-2003 3.0L V6 or 2008-2010 GM V6 engines; confirm VIN/engine.
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P0340 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0340 mean on a Saturn?
P0340 stands for "Camshaft Position Sensor Circuit Malfunction." This code means the engine computer lost or received an erratic signal from the camshaft position sensor. That sensor tells the computer the exact position and speed of the camshaft, which it uses together with the crankshaft sensor to time fuel injection and spark precisely. When the camshaft signal is missing, intermittent, or out of range, the computer sets P0340. Symptoms often include hard starting, stalling, rough running, or a no-start because the engine can't time itself correctly. On Saturn it is documented across 1 model: Vue.
What are the most common causes of P0340?
The most common causes of P0340 are: Failed camshaft position sensor, Corroded or loose sensor connector, Damaged or shorted sensor wiring, Bad reluctor/tone ring on the camshaft, Loose timing chain/belt or jumped timing, Metal debris or oil contamination on the sensor tip, Poor sensor power or ground supply, Faulty PCM/ECM (rare). The specific cause varies by vehicle.
How much does it cost to fix P0340 on a Saturn?
Published repair estimates on Saturn range from $600 to $1,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.