Powertrain, generic (extended)

P2355 Cylinder 10 Pressure Sensor Circuit High

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modeNo

P2355 means the cylinder 10 pressure signal is stuck above its upper limit. Taking the Saab 9-5 diesel with GM's 2.0 engine as the model, the Type B high codes for its four cylinders (P0398 on cylinder 1) wait until the signal has stayed above the threshold for over 2 s with the engine running. An interrupted signal or low reference circuit lets the input float upward, and the scan tool then displays a fixed 10,000 kPa instead of a value inside the normal 0 to 9,000 kPa. Saab's way to tell wiring from sensor: bridge signal and low reference at the harness plug with a fused jumper; the reading must then fall below 50 kPa, otherwise the fault lies in the harness or the ECM. No manufacturer documents P2355 for cylinder 10 itself; P2354 is the low counterpart.

Likely causes

Signal or low reference wire open, connector pulled off

Signal or reference shorted to a voltage source

Sensor electronics driving the output high

Symptoms

Check engine light after two trips
Peak pressure for cylinder 10 frozen at a very high value
No obvious driveability complaint

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€50–500

Time0.5–3.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

cylinder pressure sensor glow plugsensor wiringengine control module

References: saabwisonline.com, law.cornell.edu.