P0342
Camshaft Position Sensor "A" Circuit Low Input (Bank 1)
The CMP signal voltage is below the lower threshold. Most often a sensor with degraded internal output or a short to ground.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Common causes
Ordered by how often each turns out to be the cause.
- Sensor failedCommon
- Signal shorted to groundPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Camshaft Position Sensor
- Camshaft Position Sensor Wiring
P0342 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.