Camshaft Position Sensor B Circuit High (Bank 1)
What it means
The engine computer has seen the signal voltage from camshaft position sensor B on bank 1 stay above its normal limit. This is usually caused by an open signal or ground wire or a short to voltage, so normal pulses do not reach the computer.
Related lights
Dashboard lights that may come on with this code.
Symptoms4
- Check engine light on.
- Reduced power because exhaust cam variable valve timing (VVT) is disabled.
- Long cranking on some vehicles.
- Occasional slight roughness.
Possible causes5
- Open in the signal wire or ground wire.
- Loose or corroded connector terminal.
- Signal wire shorted to a supply wire.
- Internal sensor failure.
- Faulty engine computer (rare).
How to diagnose5
- Watch the signal voltage on a scan tool and compare it with cam sensor A on the same bank.
- Inspect the connector for loose or corroded terminals.
- Check continuity of the signal and ground wires back to the engine computer.
- Unplug the sensor and confirm there is no unexpected voltage on the signal wire.
- If the circuit is sound, replace the sensor or swap it with sensor A if identical.
How to fix5
- Repair the connector terminals and clean the connector.
- Repair the broken wire or the short to voltage.
- Repair a corroded ground point.
- Replace cam sensor B if it is proven faulty.
- Clear the codes and confirm a steady signal with no return of 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 cost is low for a terminal or wire repair and 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
Is cleaning the connector enough?
Sometimes, if a corroded or loose terminal was the cause. Clear the code after cleaning, and if it returns, continue testing the wiring and sensor.
Is this code related to the timing chain?
Usually not. This is an electrical code for high circuit voltage; timing problems normally show up as performance or correlation codes such as P0366 or P0017.
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