P0340 on Opel: How to Diagnose & Fix
Camshaft Position Sensor Circuit Malfunction
1 Opel model · 1 documented issue · 1 critical · $700-$3,000 repair
P0340 on Opel by model: symptoms, diagnosis and fix
The 1.7 CDTI water pump is timing-belt-driven in this engine. When the pump seizes or its impeller fails, the timing belt can be ejected — leading to valve damage. Failure typically appears between 80,000-130,000 km, often before the recommended belt service.
Common Symptoms
- coolant weep
- belt area noise
- sudden engine stall
- no compression after pump seize
How to Fix
Replace water pump WITH timing belt as a kit (€700-€1,100) rather than belt alone. Catastrophic pump failure with belt jump means head rebuild (€2,500+). Do the kit early if there's any whining or weeping from the pump.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- DAYCO KTBWP5310 water-pump and timing-belt kit
Confirm VIN/chassis before purchase.
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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 Opel?
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 Opel it is documented across 1 model: Mokka.
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 Opel?
Published repair estimates on Opel range from $700 to $3,000 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.