P2893 code meaning
Cylinder 1 Ion Current Sense Circuit High
Powertrain system Generic code P28xx codes Check engine light
What P2893 means
With P2893 the ion signal from cylinder 1 sits above its plausible ceiling. A signal line touching a supply voltage is the most direct explanation; crosstalk from the ignition primary circuit or a defective evaluation stage that saturates can show the same picture. Because knock is recognised from fast oscillations superimposed on the ion current, a signal pinned high leaves no room for that information, and the module will usually retard timing on cylinder 1 for safety. Saab's ion detection module, for instance, receives the cylinder 1 trigger on pin 9 and the matching ion input on pin 16, both of which can be checked for foreign voltage. A public manufacturer description of P2893 does not exist. Compare P2892 for the low reading and P2897 for cylinder 2.
P2893 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 P2893
- MIL with cylinder 1 ion fault
- Reduced power and possibly higher fuel consumption
- Knock may go unnoticed on cylinder 1
Common causes of P2893
- Most likelyIon signal wire of cylinder 1 shorted to a voltage source
- PossibleInternal fault in coil 1 coupling ignition voltage into the signal
- Less likelySaturated input in the ion processing 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 1Ignition coil cyl 1Ion sense module
What each part of P2893 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. |
| 93 | The exact fault in that area. |
What to do next
- Note P2893 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 P2893
What does P2893 mean?
P2893 means "Cylinder 1 Ion Current Sense Circuit High". With P2893 the ion signal from cylinder 1 sits above its plausible ceiling. It is a generic code, so it means the same on every make.
Is it safe to drive with P2893?
Drive gently and only to a workshop. With P2893 the car can go into limp mode (reduced power) to protect itself.
Will P2893 fail an emissions test?
Yes, it can. P2893 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 P2893 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 P2893 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.