P23EACamshaft A Position Signal Output Circuit Low (Bank 2)
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Code stored, engine running normally
- Harsher shifts or delayed engagement if the transmission module uses the signal
- Start-stop function switched off
- Likely causes
- LikelyOutput wire chafed through to ground on the engine or body
- PossibleReceiving module with an input shorted to ground
- RareMoisture or dirt bridging terminals in a connector
- RareOutput stage in the engine control module failed
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.