Camshaft Position Sensor A Circuit Low (Bank 2)
What it means
The engine computer has seen the signal voltage from camshaft position sensor A on bank 2 stay below its normal limit. The most likely cause is a wire shorted to ground or a loss of sensor supply, so the computer disables cam timing control on that bank.
Symptoms4
- Check engine light on.
- Reduced power because variable valve timing (VVT) on bank 2 is disabled.
- Occasional long cranking.
- Higher fuel consumption.
Possible causes6
- Signal wire shorted to the engine or ground through damaged insulation.
- Open or weak supply voltage to the sensor.
- Internal short inside the sensor.
- Corroded or oil-soaked connector.
- A short in another sensor sharing the same reference voltage supply.
- Faulty engine computer (rare).
How to diagnose5
- Read all codes and look for reference voltage codes such as P0641 or low-voltage codes on other sensors.
- Unplug the sensor, measure supply voltage at the connector and compare it with the manufacturer specification.
- Measure resistance between the signal wire and the body with connectors unplugged to find a short.
- Inspect the harness near the exhaust manifold and moving parts on the bank 2 side.
- If the circuit is sound, try a known-good sensor or swap it with bank 1 if they are identical.
How to fix5
- Repair and insulate the shorted section and secure the harness away from heat and rubbing.
- Clean the connector and fix the source of oil reaching it.
- Repair the reference supply circuit or the other sensor causing the short.
- Replace the bank 2 cam sensor if it is proven faulty.
- Clear the codes and confirm the code does not return.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
It often ends with a simple wire or connector repair; the cost rises when a new sensor is needed in a hard-to-reach location.
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 sensor be fine with this code?
Yes. The cause is often a wire touching ground or a lost supply, so test the circuit before buying a new sensor.
Why does the car feel weaker?
Without a reliable signal the computer cannot control bank 2 cam timing, so it parks the cam in a safe position that reduces power.
This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.
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