Crankshaft Position Sensor 'A' Circuit High Input
The crankshaft position sensor input is too high, possibly indicating a problem in the circuit.
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 crankshaft position sensor reads where the crankshaft is, and when it sees a voltage that’s too high (over about 5 volts), the computer thinks something’s wrong with the sensor or the wiring connecting it.
What the computer is actually seeing
The Engine Control Module (ECM) monitors the crankshaft position sensor signal, expecting a voltage range between 0.5V to 4.5V. A signal above 5V triggers this code.
What a healthy reading looks like
Crankshaft position sensor voltage should be between 0.5V and 4.5V at all times while the engine is running.
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 crankshaft position sensor wiring and connectors for damage or corrosion.
- 2Measure the voltage at the crankshaft position sensor connector with the engine running; expect 0.5V to 4.5V.
- 3If voltage is high (> 5V), inspect for short circuits in the wiring harness leading to the ECM.
- 4Disconnect the sensor, then measure the resistance of the sensor; it should match manufacturer specifications.
- 5If the sensor fails the resistance test, replace it and clear the code.
Common causes
- Faulty crankshaft position sensor
- Damaged wiring or connectors
- Short circuit in the sensor circuit
- ECM malfunction
- Incorrect sensor gap adjustment
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive as the engine timing could be affected, leading to potential damage.
Will this code come back after I clear it?
If the underlying issue isn't fixed, the code will likely return.
Why does this code sometimes pair with other codes?
Multiple codes can occur due to shared wiring or simultaneous issues with related sensors.
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