P03A5
Cylinder 2 Pressure Too High
Generic OBD-II
Real-world scan data
Seen in
22
scans in the past year
Found in
<0.1%
of scans
<0.1%
of scans that found faults
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Check and clean or replace the spark plugs
- Inspect and replace any faulty fuel injectors in cylinder 2
- Evaluate and replace the ignition coil in cylinder 2 if necessary
- Examine and replace any damaged or worn piston rings in cylinder 2
- Conduct a compression test and inspect the cylinder head for any issues
Common causes
Most likely first
- Incorrect fuel mixture in the cylinder 2
- Faulty fuel injector in cylinder 2
- Malfunctioning spark plug in cylinder 2
- Leaking or sticking valve in cylinder 2
- Issues with the ignition system in cylinder 2
How to diagnose & fix
Work through it in order
- Engine misfires or runs rough
- Poor fuel efficiency
- Illumination of the Check Engine Light
- Loss of power or hesitation during acceleration
- Excessive exhaust smoke
Read & clear P03A5 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.