P2A20Injection Pump Fuel Metering Control F Low (Cam/Rotor/Injector)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2A20 is the low-signal fault of metering element F: the module measures a voltage or current on that drive line that is lower than the switching state allows. Shorts to ground, broken conductors on low-side switched circuits and connectors pushed out of their housing are the usual suspects. Element F is the sixth individually controlled metering element, so the code only concerns engines with six such units. No manufacturer describes P2A20 publicly; even Volvo, which uses the letter F, lists it only for range/performance. As an analogy, Saab's 2011 9-5 diesel sets P0253 for its regulator line shorted to ground and P0251 for an open line, each after one second, both as Type A faults. The high-signal counterpart of P2A20 is P2A21.
- What you may notice
- Check engine light on
- Reduced power
- Rough idle
- Likely causes
- LikelyDrive line of element F shorted to ground
- PossibleTerminal pushed out of the connector housing or broken conductor
- RareOpen coil in metering element F
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.