P2358: Cylinder 10 Pressure Too High
What to do
A new hard knock from the engine alongside this code deserves prompt attention — over-pressure is the direction that breaks things. The injector for the named cylinder is the lead suspect.
What this code means
Cylinder 10's measured pressure is genuinely high — combustion peaking harder than design, which on a diesel usually means too much fuel or too early: an injector leaking past its seat or over-delivering, or injection timing drifted ahead of where it should fire.
Sustained over-pressure is the direction that stresses head gaskets, bearings and the pressure sensor itself, so the module typically trims that cylinder back — the code records both the observation and the correction. An audible knock from one cylinder of a diesel that previously ran quietly is this family heard rather than measured.
Likely causes
Start here
- Leaking fuel injector · moderate
Less common
- Failed fuel injector · moderate
- Faulty cylinder pressure sensor · moderate
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about P2358.