P2357 indicates that the engine control module (ECM) has detected abnormally low pressure in cylinder 10 during a compression or combustion monitoring event. This code is typically found in diesel engines equipped with individual cylinder pressure sensors. The condition can be caused by a faulty sensor, wiring issues, or a genuine mechanical problem within the cylinder.
The sensor for cylinder 10 may have failed internally, providing an incorrect low-pressure reading to the ECM.
Damaged wiring, loose connectors, or corrosion at the sensor harness can cause an open or short circuit, triggering the code.
Low compression in cylinder 10 due to worn piston rings, damaged valves, or a blown head gasket can cause actual low pressure.
In rare cases, a software glitch or internal ECM failure may incorrectly interpret sensor data. This is the least likely cause and should only be considered after all other possibilities are ruled out.
It depends. If the engine is running rough or lacks power, continued driving may cause further damage. If the vehicle runs normally, you may drive short distances, but the underlying issue should be diagnosed promptly.
No. While a faulty sensor is a common cause, the code can also indicate a real mechanical problem like low compression in cylinder 10. A proper diagnosis is needed to distinguish between sensor and engine issues.
Rarely. ECM failure is an uncommon cause for P2357. Most cases are resolved by repairing wiring or replacing the cylinder pressure sensor. Only consider ECM replacement after all other possibilities have been exhausted.
A technician will use a scan tool to read live data from the cylinder pressure sensor, perform a compression test, and inspect the wiring. Swapping the sensor with another cylinder can help confirm if the issue follows the sensor.