P0340 on Dodge: How to Diagnose & Fix
Camshaft Position Sensor Circuit Malfunction
2 Dodge models · 2 documented issues · 1 critical · $100-$900 repair
P0340 on Dodge by model: symptoms, diagnosis and fix
The Hall-effect camshaft and crankshaft position sensors (and their connectors) on Intrepid engines degrade with heat and fail intermittently, cutting spark and fuel without warning. Owners report sudden stalling while driving, engines that die after warming up and restart once cooled, and intermittent crank-but-no-start conditions. Chrysler addressed start/stall and no-start conditions in service bulletin coverage (SB 195966, May 1999), and the same defect is documented across the LH platform including the Chrysler Concorde.
Common Symptoms
- Engine stalls suddenly while driving, then restarts after cooling down
- Intermittent crank-but-no-start, especially when hot
- Stumbling, jerking, or engine misses under load
- Check engine light with cam/crank sensor codes
- Tachometer drops to zero just before the stall
How to Fix
Replace the failed camshaft and/or crankshaft position sensor and inspect the connector and wiring for heat damage; many shops replace both sensors together since they fail similarly. It is an inexpensive bolt-in repair once correctly diagnosed.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Mopar 4609086AF camshaft-position sensor
Replace only when scope/scan testing confirms cam-sensor or circuit failure Fitment: Confirm exact year/engine; the 1993-2004 issue span does not use one cam sensor Live OEM direct product page when checked
- Mopar 4609009 crankshaft-position sensor
Replace a failed crank sensor after heat-related signal loss is reproduced Fitment: Use only for catalog-confirmed engine/year applications Live OEM direct product page when checked
- Mopar 4727451AA crankshaft-position sensor
Alternate engine/year sensor branch Fitment: Confirm installed engine and connector before purchase Live OEM direct product page when checked
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Sources for this issue (1)
The 2.0L is an interference engine, so a snapped or skipped timing belt bends valves and can wreck the engine. First-gen Neons use a rubber timing belt (not a chain) with a hydraulic tensioner that is a known weak point — a leaking/failing tensioner lets the belt go slack, causing ticking/slapping, jumped timing, or outright breakage. Age and heat harden the belt independent of mileage, so cars sitting on original belts are at high risk regardless of odometer reading.
Common Symptoms
- Ticking or belt-slap noise from the timing cover
- Rough idle / misfire as belt stretches
- Sudden no-start with cranking but no compression
- Engine cranks but won't fire after belt breakage
How to Fix
Replace the timing belt, the hydraulic tensioner, and the water pump together at roughly 60,000-100,000 mile intervals (and by age on older cars). Inspect idler and cam/crank seals while apart. If a belt has already broken, a valve job or head replacement may be required.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Engine Timing Belt Tensioner Hydraulic AssemblyCross-refBTC-003
Fitment confirmed against the ShowMeTheParts catalog for this vehicle's year and engine.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
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 Dodge?
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 Dodge it is documented across 2 models: Intrepid, Neon.
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 Dodge?
Published repair estimates on Dodge range from $100 to $900 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.