P2A80Alternative Fuel Pump A Compression Stroke Valve Control Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2A80 concerns the compression stroke valve of pump A when its circuit is intact but the outcome of a command does not match. In the patented multi-element design, the time the solenoid holds the spool in the fill position sets the stroke, and a shorter command yields a partial stroke; the controller therefore expects a defined gain in gas pressure or hydraulic load per activation. If pump A contributes clearly less than its partners, or the spool reacts late, a sticking spool, varnished oil or a weak return spring are likely. Caterpillar also stresses that hydraulic pressure during the stroke must be held within tight limits to keep the LNG from vaporizing. No manufacturer publishes P2A80 or its test.
- What you may notice
- Warning lamp after several drive cycles
- Uneven gas pressure and slight power loss
- Likely causes
- LikelySpool of valve A sticking or slow
- PossibleContaminated or varnished hydraulic oil
- RareWeak return spring in the valve
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €200 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.