P23EE code meaning
Camshaft B Position Signal Output Circuit High (Bank 1)
What P23EE means
P23EE flags a camshaft B, bank 1 output line that the ECM cannot pull low: the voltage stays near supply level, pointing to a short to a battery-fed or 5 V wire, a faulty pull-up in the receiving unit or a failed ECM driver transistor. GM documents the test only for the bank 1 camshaft A counterpart P2616 on the 2019 LTG: monitored while the output is commanded low, a short once resistance to power drops to 0.5 ohm or below, a sample every 100 ms, 40 bad results in 50, Type C. No public manufacturer data exist for P23EE. A driver stage exposed to a hard short can overheat, so locating the short before replacing a module matters. Siblings: open circuit P23EC, low P23ED, the bank 2 high fault P23F1.
P23EE 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 P23EE
- Code logged while the engine runs normally
- Faults or reduced functions in the module fed by the signal
Common causes of P23EE
- Most likelyOutput line shorted to a battery or sensor supply wire
- PossibleFaulty pull-up circuit in the receiving module
- Less likelyECM driver transistor burnt out
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 b b1 outputWiring harness
What each part of P23EE 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. |
| EE | The exact fault in that area. |
What to do next
- Note P23EE 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 P23EE
What does P23EE mean?
P23EE means "Camshaft B Position Signal Output Circuit High (Bank 1)". P23EE flags a camshaft B, bank 1 output line that the ECM cannot pull low: the voltage stays near supply level, pointing to a short to a battery-fed or 5 V wire, a faulty pull-up in the receiving unit or a failed ECM driver transistor. It is a generic code, so it means the same on every make.
Is it safe to drive with P23EE?
Drive gently and only to a workshop. With P23EE the car can go into limp mode (reduced power) to protect itself.
Will P23EE fail an emissions test?
P23EE 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 P23EE to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P23EE clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.