P2896Cylinder 2 Ion Current Sense Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2896 reports a cylinder 2 ion signal that remains under its lower limit. A ground short on the line from coil 2, a cracked plug insulator that drains the measuring voltage to the cylinder head, or a coil whose bias generator has failed can all produce a near-zero reading. Where several cylinders share a harness section or connector, a chafed spot can hit cylinder 2 alone if only its conductor is damaged, so the wiring along the cam cover deserves a look. On Saab's 2009 four-cylinder module the cylinder 2 ion input is pin 7, which allows measuring the line directly. No manufacturer publishes this code. Without a usable signal, misfire and knock detection for cylinder 2 lose their basis. P2897 is the high counterpart; cylinder 1 reports the same condition as P2892.
- What you may notice
- MIL with ion fault on cylinder 2
- Engine runs on a safe ignition map with less power
- Misfire on cylinder 2 may not be detected
- Likely causes
- LikelyChafed ion signal wire of cylinder 2 touching ground
- PossibleCracked spark plug insulator in cylinder 2
- PossibleMeasuring voltage generator in coil 2 failed
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.