P23EA code meaning
Camshaft A Position Signal Output Circuit Low (Bank 2)
What P23EA means
P23EA sets when the ECM's output line that relays the bank 2 camshaft A position signal to another control unit is pulled toward ground. The check is blocked during cranking: the module commands the output high and expects the line to rise; if it stays low, the wire is chafed against ground or the receiver has an internal short. GM's 2019 tables for the bank 1 equivalent P2615 give 0.5 ohm or less to ground, or 200 kOhm and more for an open, sampled every 100 ms, with 40 of 50 samples having to fail, rated Type C without MIL. No manufacturer lists P23EA publicly, so the GM values are an analogy. Depending on the receiver, shift quality or start-stop may suffer while the camshaft sensor itself is fine.
P23EA at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P23EA
- Code stored, engine running normally
- Harsher shifts or delayed engagement if the transmission module uses the signal
- Start-stop function switched off
Common causes of P23EA
- Most likelyOutput wire chafed through to ground on the engine or body
- PossibleReceiving module with an input shorted to ground
- Less likelyMoisture or dirt bridging terminals in a connector
- Less likelyOutput stage in the engine control module failed
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Engine control moduleCam position signal a b2 outputWiring harness
What each part of P23EA means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 3 | Area: ignition system or misfire. |
| EA | The exact fault in that area. |
What to do next
- Note P23EA 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 P23EA
What does P23EA mean?
P23EA means "Camshaft A Position Signal Output Circuit Low (Bank 2)". P23EA sets when the ECM's output line that relays the bank 2 camshaft A position signal to another control unit is pulled toward ground. It is a generic code, so it means the same on every make.
Is it safe to drive with P23EA?
Drive gently and only to a workshop. With P23EA the car can go into limp mode (reduced power) to protect itself.
Will P23EA fail an emissions test?
P23EA is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P23EA to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P23EA clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.