P0348
Generic (SAE) Basic entry
Camshaft Position Sensor 'A' Circuit High
Severity
Medium
Typical repair cost
40 – 350 EUR
System
Powertrain
What it means
P0348 is stored when the engine control module measures a voltage in the Camshaft Position Sensor 'A' circuit above the expected maximum, typically because the signal wire is shorted to battery voltage or the circuit is open and pulled up internally.
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Symptoms
- Flashing or steady check engine light
- Engine shaking, especially at idle
- Loss of power under load
- Fuel smell from the exhaust
- Risk of catalytic converter damage if ignored
Common causes
- Damaged, chafed or corroded wiring in the Camshaft Position Sensor 'A' circuit
- Corroded, loose or water-damaged connector terminals
- Failed Camshaft Position Sensor 'A' component (sensor, solenoid or actuator)
- Poor ground connection for the module or component
- Faulty control module driver (rare, confirm all else first)
How to diagnose
- Read freeze frame data and note when the code set (cold start, under load, after rain)
- Inspect the Camshaft Position Sensor 'A' connector for bent pins, corrosion and water; wiggle the harness with the engine running and watch live data
- Measure supply voltage and ground at the connector with the key on
- Check the signal wire for shorts to ground or battery and for continuity to the control module
- Test or substitute the Camshaft Position Sensor 'A' only after wiring and connectors are confirmed good
- Clear the code and complete a drive cycle to confirm the repair
Frequently asked questions
Can I keep driving with P0348?
Usually yes for a short time, but expect reduced performance or higher fuel use. Have it diagnosed within a few days.
Will clearing P0348 fix it?
No. Clearing only erases the stored code; it returns as soon as the monitor runs again unless the cause is repaired.
Related codes
Nearby codes in this group
- P0347Camshaft Position Sensor 'A' Circuit Low
- P0349Camshaft Position Sensor 'A' Circuit Intermittent
- P0346Camshaft Position Sensor A Circuit Range/Performance (Bank 2)
- P0350Ignition Coil Primary/Secondary Circuit
- P0345Camshaft Position Sensor A Circuit (Bank 2)
- P0351Ignition Coil A Primary/Secondary Circuit
- P0344Camshaft Position Sensor A Circuit Intermittent (Bank 1 or Single Sensor)
- P0352Ignition Coil B Primary/Secondary Circuit