P236B
Cylinder 12 Pressure Too Low
P236B is an OBD-II diagnostic trouble code meaning: Cylinder 12 Pressure Too Low. Common causes: low cylinder compression, fuel injector malfunction. Estimated repair cost: $56–222.
Symptoms
- Reduced engine power
- Increased fuel consumption
- Misfires
- Unstable engine operation
- Poor engine starting
Causes
- Low cylinder compression
- Fuel injector malfunction
- Worn or damaged piston rings
- Problems with valves (jamming, burnout)
- Ignition system malfunction
How to Fix
- Check compression in cylinder
- Inspect and, if necessary, replace the fuel injector
- Check the condition of the piston rings and cylinder
- Inspect valves for damage
- Check the ignition system (spark plugs, coils, wires)
Related codes
Error P236B by Vehicle Brand
FAQ
What does the P236B code mean?
P236B is an OBD-II diagnostic trouble code that indicates: Cylinder 12 Pressure Too Low
What causes a P236B error code?
The most common causes of P236B include: Low cylinder compression; Fuel injector malfunction; Worn or damaged piston rings; Problems with valves (jamming, burnout).
How do I fix a P236B diagnostic trouble code?
To fix P236B: Check compression in cylinder. Inspect and, if necessary, replace the fuel injector. Check the condition of the piston rings and cylinder. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P236B?
Do not drive — repair immediately
How much does it cost to fix P236B?
The estimated repair cost for P236B is $56–222. Actual cost depends on your vehicle, location, and labor rates.
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