P2357: Cylinder 10 Pressure Too Low

What it means

Cylinder 10 measured peak combustion pressure is below the calibrated minimum — typically low compression, weak injection, or stuck-open exhaust valve.

At a glance

• Usually lights the check-engine light
• Affects emissions; the car can fail an emissions test

How it works

The engine controller compares cylinder 10’s measured peak combustion pressure with its calibrated minimum. This code sets when cylinder 10 pressure is too low, which can result from weak compression, a valve that does not seal, or insufficient fuel from that cylinder’s injector.

Common causes

Most likely first.

1. Low compression in cylinder 10
2. Leaking or sticking valves
3. Worn piston rings or cylinder wear
4. Cylinder 10 injector delivering too little fuel

Symptoms

• Check-engine light
• Rough running or misfire
• Reduced engine power
• Poor acceleration

How to diagnose it

1. Save freeze-frame data and compare cylinder 10 pressure or contribution readings with the other cylinders to confirm the low reading.
2. Inspect cylinder 10’s injector connector and wiring for damage or a poor connection that could limit fuel delivery.
3. Check cylinder 10 injector operation and delivery using the manufacturer’s procedure.
4. If fueling checks pass, perform a compression test on cylinder 10 and compare the result with the manufacturer’s specification.
5. If compression is low, use the specified leak-down or mechanical checks to distinguish valve leakage from piston-ring or cylinder wear.

Common fixes

• Repair a poor connection or damaged wiring at the cylinder 10 injector.
• Service or replace a cylinder 10 injector confirmed to be under-delivering.
• Repair a leaking or sticking cylinder 10 valve.
• Repair confirmed piston-ring, cylinder, or other compression damage.

Can I keep driving?

Limit driving if the engine is misfiring or down on power, and avoid towing or hard acceleration. Continued operation with low cylinder 10 pressure can worsen engine damage and increase emissions.