P2897 code meaning
Cylinder 2 Ion Current Sense Circuit High
Powertrain system Generic code P28xx codes Check engine light
What P2897 means
P2897 applies when the ion current reading of cylinder 2 is stuck above the range the module accepts. Typical electrical reasons are a signal line that has contacted a supply or ignition feed, a damaged coil 2 that leaks primary voltage into its measuring output, or a missing ground at the coil that shifts the reference. Since the processing electronics compare the cylinders, a single high channel is easy to isolate: exchanging coil 2 with another position and watching whether the code follows is a quick test. On Saab's 2009 module the ignition trigger for cylinder 2 arrives on pin 10, which helps when tracing the wiring. No manufacturer documents P2897 publicly. The low case is P2896; cylinder 1 has the matching code P2893.
P2897 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 P2897
- MIL and stored cylinder 2 ion fault
- Less power due to retarded timing on cylinder 2
- Knock protection for cylinder 2 limited
Common causes of P2897
- Most likelyIon signal wire of cylinder 2 in contact with a voltage source
- PossibleCoil 2 leaking primary voltage into the measuring output
- Less likelyPoor ground connection at coil 2
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Spark plug cyl 2Ignition coil cyl 2Ion sense module
What each part of P2897 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. |
| 97 | The exact fault in that area. |
What to do next
- Note P2897 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 P2897
What does P2897 mean?
P2897 means "Cylinder 2 Ion Current Sense Circuit High". P2897 applies when the ion current reading of cylinder 2 is stuck above the range the module accepts. It is a generic code, so it means the same on every make.
Is it safe to drive with P2897?
Drive gently and only to a workshop. With P2897 the car can go into limp mode (reduced power) to protect itself.
Will P2897 fail an emissions test?
Yes, it can. P2897 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 P2897 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 P2897 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.