P0340 on Volvo
Camshaft Position Sensor Circuit Malfunction
P0340 on Volvo vehicles indicates camshaft position sensor circuit malfunction. Au7o has documented this code across 2 Volvo models — most commonly on 850, V40. 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. Typical repair costs on Volvo range from $50 to $3,000, depending on the specific model and root cause.
Common Causes of P0340
- •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)
P0340 on Volvo by Model
Volvo 850(1 issue)
- Distributor Cap and Rotor Failure1993-1997
The distributor cap and rotor on the 850 5-cylinder develop carbon tracking and contact wear, causing misfires and hard starting. The distributor seal also leaks oil into the cap.
Volvo V40(1 issue)
- Timing Belt Failure Risk2000-2004
The Volvo V40 with the 1.9T engine (shared with Mitsubishi) is an interference engine requiring strict timing belt maintenance. Belt failure causes catastrophic valve and piston damage. The belt and tensioner must be replaced together.
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View P0340 across all makes →Frequently Asked Questions
What does P0340 mean on Volvo?▼
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 Volvo specifically, this code is documented across 2 models.
What causes P0340 on Volvo vehicles?▼
Common causes on Volvo: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0340 on a Volvo?▼
Repair costs on Volvo range from $50 to $3,000, depending on the specific model and root cause.
Which Volvo models have P0340 documented?▼
Au7o has documented P0340 on 2 Volvo models: 850, V40.