P23E9Camshaft A Position Signal Output Circuit/Open (Bank 2)
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- P23E9 concerns a signal the engine control module sends out rather than one it receives: on some engines the ECM passes a conditioned copy of the bank 2 camshaft A position signal on to another module that needs engine phase information. The code flags a broken or otherwise faulty output line, typically an open circuit found when the driver stage is switched. No manufacturer documents P23E9 publicly. GM's tables for the bank 1 counterpart on the 2019 2.0 L LTG show the method: the driver voltage is compared with controller limits, and an open line above about 200 kOhm is caught during the low-circuit check, which is why P2614 may set alongside it. Ground faults belong to P23EA, shorts to voltage to P23EB. The engine itself usually keeps running normally.
- What you may notice
- Stored code with no noticeable change in engine running
- Fault entries in the module that receives the camshaft signal
- Start-stop or shift functions may be restricted
- Likely causes
- LikelyBroken wire in the output line to the receiving module
- PossibleTerminal pushed back or corroded in a connector
- PossibleReceiving module unplugged or without its load resistor
- RareFaulty output driver inside the engine control module
- 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.