P2356: Cylinder 10 Pressure Sensor Circuit Intermittent/Erratic
What to do
Pattern notes help most, and heat patterns especially — a fault that appears only fully warmed points at baked wiring near the head.
What this code means
Cylinder 10's pressure signal is cutting in and out — dropouts no combustion chamber could produce, convicting the wiring per the corpus's standing intermittent rule. On these engines the sensor's lead runs through the hottest real estate on the vehicle, which is where insulation ages first.
Likely causes
Start here
- Intermittent wiring fault · moderate
- Corroded or loose connector · easy
Less common
- Heat damage to sensor or wiring · 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
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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.
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