This code indicates that the powertrain control module has detected a cylinder pressure sensor signal from cylinder 10 that is outside the expected range or not performing within calibrated limits. The sensor monitors in-cylinder combustion pressure to optimize engine operation, and the fault typically stems from a sensor or circuit issue rather than the control module itself. The discrepancy triggers the fault because the module cannot validate combustion feedback against its modeled expectations.
The sensor itself may drift, crack, or suffer internal failure, causing its output voltage or digital signal to fall outside the calibrated thresholds the control module expects.
Opens, shorts-to-ground, shorts-to-voltage, or high resistance in the harness between the sensor and control module can distort or interrupt the pressure signal.
Moisture, contamination, or fretting at the sensor or control module connector can produce intermittent contact resistance and out-of-range readings under vibration or thermal load.
Actual mechanical issues such as low compression, valve train faults, or abnormal combustion in cylinder 10 may generate pressure patterns the control module interprets as an implausible sensor range error.
An internal control module fault affecting the specific signal processing circuit is possible but statistically very rare; it should be the last possibility investigated after the sensor and circuit are proven good.
Short-distance driving may be possible, but engine performance and emissions control may be degraded; prompt diagnosis is recommended to avoid potential engine damage.
On many diesel engines, the pressure sensor is integrated into the glow plug assembly, meaning the combined unit is often serviced as one component.
No. PCM failure is an extremely unlikely cause for this isolated cylinder pressure sensor fault; thorough testing of the sensor and circuit should always be done first.
It means the sensor signal is outside expected limits or does not correlate properly with other engine data, indicating a sensor, circuit, or occasional mechanical issue rather than an absolute electrical short or open.