P2898 code meaning
Cylinder 3 Ion Current Sense Circuit
Powertrain system Generic code P28xx codes Check engine light
What P2898 means
P2898 marks a basic circuit failure in the ion current measurement of cylinder 3: the engine computer receives nothing it can evaluate from that spark plug. With ion sensing, the plug doubles as a probe, because a bias voltage across the gap drives a small current through the burning, conductive gas. On Saab's Trionic four-cylinders, cylinder 3 shares its start-up spark with cylinder 2 until synchronisation is reached, and only the combustion signal reveals which of the two really burned. The T7 version groups cylinders 3 and 4 on one detector, whose open line to the engine module Saab reports with its own code P1334. No manufacturer publicly documents P2898 itself; coil 3, its connector and the plug are the first checks.
P2898 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2898
- MIL with ion fault stored for cylinder 3
- Starting may take longer while cylinder identification is uncertain
- Engine runs with cautious ignition timing and somewhat less power
Common causes of P2898
- Most likelyIgnition coil of cylinder 3 whose ion measuring stage has failed
- PossibleLoose or corroded connector at coil 3 or broken ion signal wire
- Less likelyFaulty cylinder 3 input in the ion processing module or engine module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Spark plug cyl 3Ignition coil cyl 3Ion sense module
What each part of P2898 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 8 | Area: transmission. |
| 98 | The exact fault in that area. |
What to do next
- Note P2898 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2898
What does P2898 mean?
P2898 means "Cylinder 3 Ion Current Sense Circuit". P2898 marks a basic circuit failure in the ion current measurement of cylinder 3: the engine computer receives nothing it can evaluate from that spark plug. It is a generic code, so it means the same on every make.
Is it safe to drive with P2898?
Drive gently and only to a workshop. With P2898 the car can go into limp mode (reduced power) to protect itself.
Will P2898 fail an emissions test?
Yes, it can. P2898 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2898 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2898 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.