P0340 on Chrysler: How to Diagnose & Fix
Camshaft Position Sensor Circuit Malfunction
1 Chrysler model · 1 documented issue · $150-$600 repair
P0340 on Chrysler by model: symptoms, diagnosis and fix
The Chrysler 3.5L SOHC V6 is known to weep oil from the camshaft position sensor O-ring and valve-cover sealing surfaces as the rubber hardens with age. On the low-mileage, long-parked Prowler fleet this shows up as oil residue on the block, a burning-oil smell, and occasionally an oil-contaminated cam sensor connector. Left unaddressed it can foul the sensor and contaminate wiring.
Common Symptoms
- Oil residue/weeping around valve covers
- Burning oil smell after driving
- Oil in the cam sensor connector
- Low oil level over time on a garaged car
How to Fix
Clean and pinpoint the source (cam sensor O-ring vs valve cover gasket vs cam bearing cap). Replace the hardened cam position sensor O-ring and/or valve cover gaskets with updated seals; clean the sensor connector so oil cannot re-wick into it. Address the leak before it contaminates the cam sensor or ignition components.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Engine Valve Cover Gasket SetCross-refVS50248
Fitment confirmed against the ShowMeTheParts catalog for this vehicle's year and engine.
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Sources for this issue (1)
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 Chrysler?
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 Chrysler it is documented across 1 model: Prowler.
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 Chrysler?
Published repair estimates on Chrysler range from $150 to $600 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.
Looking for P0340 on a different make?
View P0340 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.