This code indicates that the engine computer has detected a voltage reading from the cylinder 10 pressure sensor that is below the normal expected range. This typically points to an electrical issue in the sensor circuit, such as a short to ground or a failed sensor, rather than an actual mechanical engine problem.
The internal components of the sensor have degraded or shorted out, causing it to send an abnormally low voltage signal to the engine computer.
The signal wire between the sensor and the engine computer has rubbed through its insulation and is grounding out on the engine block or chassis, pulling the voltage down.
Moisture intrusion, bent pins, or a loose fit at the sensor or engine computer connector can interrupt the electrical signal or ground path.
A broken wire in the 5-volt reference, ground, or signal circuit will cause the sensor to fail to operate, resulting in a low voltage reading at the computer.
In rare cases, an internal driver failure inside the engine computer can cause it to misread the sensor voltage, but this is highly uncommon.
It is generally safe for very short distances, but driving for extended periods can cause drivability issues and potentially lead to catalyst damage if a misfire is present.
Replacing the sensor is the most common fix, but it is important to verify the wiring and connector are in good condition first, otherwise the new sensor may fail immediately or the code will not clear.
If the electrical fault is intermittent and corrects itself, the code may clear after a set number of drive cycles, but if the fault is constant, the code will remain active.
No. Drivers are sometimes incorrectly told to replace the PCM for sensor circuit codes. The computer is almost never the cause; the issue is virtually always the sensor itself or the wiring connecting it.