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P23EF

Camshaft B Position Signal Output Circuit Open Bank 2

Camshaft B Position Signal Output Circuit Open Bank 2: the circuit is open. This relates to engine timing; a fault can cause rough running, a no-start, or timing errors.

  • Check engine light: Yes
  • Emissions related: No
  • Repair difficulty: easy

Symptoms

  • Check engine light on
  • Power loss especially in mid-rpm range
  • Possible rough idle or stalling
  • Increased fuel consumption

Common causes

Ordered by how often each turns out to be the cause.

  • Open in output wiringCommon
  • Pin pushed back out of connector bodyLess likely
  • Cracked solder joint inside the module or sensorLess likely

Parts involved

  • Cam Position Signal B B2 Output

P23EF is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.