Camshaft Position Sensor 'A' Circuit Range/Performance Problem (Bank 1)
The camshaft position sensor for bank 1 is out of acceptable range or performance.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The control module is not getting a reliable signal from the camshaft position sensor on bank 1, meaning it's unsure of the camshaft's position.
What the computer is actually seeing
The PCM expects a voltage signal from the camshaft sensor between 0.5V and 4.5V but detects it outside this range.
What a healthy reading looks like
Normal sensor operation should show a voltage between 0.5V and 4.5V as the engine runs and the camshaft moves.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the wiring and connector to the camshaft position sensor for damage or corrosion. Repair or replace as needed. Decision: Are the connections clean and tight? If yes, proceed to step 2. If no, repair and retest.
- 2Use a multimeter to measure the voltage at the camshaft position sensor connector with the engine running. Expected values are between 0.5V and 4.5V. Decision: Is the voltage within this range? If yes, check the PCM. If no, replace the sensor and retest.
- 3If the sensor is replaced and voltage is still out of range, check the timing belt or chain for alignment and tension. Decision: Is the timing correct? If yes, suspect PCM. If no, adjust timing and retest.
Common causes
- Faulty camshaft position sensor
- Wiring issues (frayed or shorted wires)
- Improper timing due to a jumped timing belt/chain
- Defective PCM
- Oil contamination affecting sensor operation
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to avoid long trips as it can lead to poor engine performance or stalling.
Will this code come back after clearing?
If the underlying issue isn't fixed, the code will likely return.
Why does this code appear with other cam sensor codes?
Various codes may indicate failures in related systems or issues affecting camshaft timing.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →