Powertrain, generic (extended)

P23EC Camshaft B Position Signal Output Circuit/Open (Bank 1)

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

P23EC belongs to the camshaft B group – on most layouts the exhaust camshaft – and refers to bank 1, the side with cylinder 1. The ECM rebroadcasts the phase signal of that camshaft on a dedicated output wire, and P23EC reports that this wire, or the driver stage feeding it, shows an open or undefined circuit condition. No manufacturer publishes P23EC; the closest documented logic is GM's for P2614 to P2616 on the camshaft A output, where an open of 200 kOhm or more is detected during the low-side test. CARB requires output circuits to be checked whenever another diagnostic relies on them. Low or ground faults are P23ED, high or battery faults P23EE. Drivability normally stays intact.

Likely causes

Open circuit in the camshaft B output wire
Connector at the ECM or receiver not fully latched
Input stage of the receiving module defective

Symptoms

  • Stored code, often found during a routine scan
  • Receiving module runs on substitute values

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–900
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

engine control modulecam position signal b b1 outputwiring harness

Related codes

P23EDP23EEP23EFP23E9P2614P0365

References: gsi.ext.gm.com, law.cornell.edu.