Camshaft Position Sensor B Circuit Intermittent (Bank 1)
What it means
The engine computer has seen the signal from camshaft position sensor B on bank 1 drop out briefly and then return. The cause is usually an unstable connection in the connector or wiring, or a sensor affected by engine heat.
Related lights
Dashboard lights that may come on with this code.
Symptoms4
- Check engine light that comes and goes.
- Momentary jerk or stumble while driving.
- Intermittent loss of power.
- Rare stalling in some cases.
Possible causes6
- Loose connector or a terminal with poor grip.
- Cracked wire that opens with vibration.
- Sensor that fails when hot and then recovers.
- Oil or moisture inside the connector.
- Metal debris on the sensor tip.
- Weak ground.
How to diagnose5
- Review the freeze frame data to see the conditions when the fault occurred.
- Watch the sensor signal while gently moving the wiring and connector with the engine running.
- Test connector terminal grip and look for oil or corrosion.
- Drive to full operating temperature to see whether the fault is heat-related.
- If sensors A and B are identical, swap them; if the fault moves to P0344, the sensor is faulty.
How to fix5
- Clean the connector and repair loose terminals or replace the connector.
- Repair cracked wiring and secure the harness.
- Clean the sensor tip and fix any oil leak reaching it.
- Replace the sensor if it is proven to fail when hot.
- Clear the codes and road test under the same conditions that set the code.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
In the Saudi market: SAR 100–600 (≈ USD 27–160)
Our prices come from the Saudi market, converted at a fixed rate (SAR 3.75 per USD). Prices in your country may differ a lot, so we show the cost level.
The fix is often in the connector or wiring at low cost, but tracing an intermittent fault can lengthen diagnosis, and the cost rises when the sensor is replaced.
Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026
Frequently asked questions
Can the code go away on its own?
The light may turn off after several fault-free drive cycles, but the cause usually remains and the code will return when the same conditions repeat.
Where should I start testing?
Start with the connector and wiring, since they are the most common cause of intermittent faults, then move to the sensor if the fault is tied to engine heat.
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