P0340 on Honda
Camshaft Position Sensor Circuit Malfunction
P0340 on Honda vehicles indicates camshaft position sensor circuit malfunction. Au7o has documented this code across 2 Honda models — most commonly on Del Sol, Passport. 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 Honda range from $40 to $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 Honda by Model
Honda Del Sol(1 issue)
- Distributor Failure (Ignition Issues)1993-1997
The Del Sol uses a distributor-based ignition system with internal coil and ignition module. The distributor is prone to failure from moisture intrusion, internal coil cracking, and igniter module heat damage. Symptoms include intermittent no-start conditions, engine dying while driving, and misfires. The distributor is mounted at the rear of the cylinder head where it is exposed to engine heat and splash from the road. Remanufactured distributors are available but quality varies significantly between brands.
Honda Passport(1 issue)
- Idle Stop (Auto Start-Stop) Stalling and Failure to Restart2019-2023
Honda Passport owners report the Idle Stop (automatic engine start-stop) feature causing dangerous stalling issues. When the engine auto-stops at red lights or in traffic, it fails to restart when the brake is released, leaving the vehicle stranded in traffic. The "Collision Mitigation System" warning light often appears during these incidents. The Idle Stop system is overly aggressive and doesn't account for battery health, A/C load, or hot weather conditions. Unlike some competitors, Honda doesn't have a shift interlock, so the vehicle can roll if stalled on a hill. Many owners permanently disable Idle Stop to avoid this issue.
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View P0340 across all makes →Frequently Asked Questions
What does P0340 mean on Honda?▼
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 Honda specifically, this code is documented across 2 models.
What causes P0340 on Honda vehicles?▼
Common causes on Honda: 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 Honda?▼
Repair costs on Honda range from $40 to $500, depending on the specific model and root cause.
Which Honda models have P0340 documented?▼
Au7o has documented P0340 on 2 Honda models: Del Sol, Passport.