P0340 Ford Explorer
Camshaft Position Sensor Circuit Malfunction (Bank 1) · Powertrain Code · High · Repair: Moderate
What is P0340?
The camshaft position sensor on bank 1 is not providing a valid signal. Engine may not start or run poorly.
When the Ford Explorer triggers code P0340 (camshaft position sensor circuit malfunction (bank 1)), it typically points to an issue in the powertrain system. This is a high severity code, so address it promptly to avoid further damage or safety concerns. Below you'll find the most common causes, symptoms, and repair options specific to the Ford Explorer.
This repair is rated moderate, meaning some experience and specialty tools required.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Ford Explorer.
Common Causes on Ford Explorer
- Failed camshaft position (CMP) sensor — common failure on Ford engines over 100k miles
- Wiring or connector damage at the CMP sensor
- Timing chain stretch causing signal correlation issues
- Oil contamination in CMP sensor connector
Symptoms
- Check engine light
- Hard starting or extended crank time
- Intermittent stalling
- Rough idle
- Possible no-start condition
Notes for Ford Explorer
On the 5.0L Coyote, a P0340 alongside cam phaser codes (P0010-P0014) usually indicates a timing chain or phaser issue, not just a sensor failure.