P0340 on Kia
Camshaft Position Sensor Circuit Malfunction
P0340 on Kia vehicles indicates camshaft position sensor circuit malfunction. Au7o has documented this code across 1 Kia model — most commonly on Rio. 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 Kia range from $500 to $2,500, 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 Kia by Model
Kia Rio(1 issue)
- Timing Belt Neglect Leading to Bent Valves and Sudden No-Start on 1.6L Engines2001-2005
Early Rio models with the 1.6L DOHC engine are widely documented as suffering severe engine damage when the timing belt breaks or jumps. Because this engine is treated by owners and repair databases as an interference design in real-world failures, a belt failure can cause piston-to-valve contact, leaving the car with a sudden stall or crank-no-start and expensive cylinder head repairs. This is one of the most commonly discussed catastrophic failures on first-generation Rio models.
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View P0340 across all makes →Frequently Asked Questions
What does P0340 mean on Kia?▼
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 Kia specifically, this code is documented across 1 model.
What causes P0340 on Kia vehicles?▼
Common causes on Kia: 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 Kia?▼
Repair costs on Kia range from $500 to $2,500, depending on the specific model and root cause.
Which Kia models have P0340 documented?▼
Au7o has documented P0340 on 1 Kia model: Rio.