Powertrain, generic · Ignition system or misfire

P0368 Camshaft Position Sensor B Circuit High Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

Camshaft position sensor B is the exhaust camshaft sensor (bank 1 = side with cylinder 1), usually a Hall sensor on the exhaust cam phaser. P0368 means the signal line stays high without edges. If the signal wire is open, the roughly 5 V the engine module applies to it simply remains; if the sensor's 5 V supply or ground is missing, the sensor never switches and the signal also stays high – and a short to positive has the same effect. A code-specific manufacturer description exists only from GM: on the Saab 9-4X 2.8 turbo V6 (LAU) the signal must stay high without pulses for more than 1 s, or 10 s cumulatively, and the code follows after two trips; GM lists exactly these causes. GM's other engines of 2014–2019 and Ford report such faults under P0365. The consequence is as for P0365: exhaust cam timing in its base position, longer cranking, some loss of power.

Likely causes

Connector off or corroded, signal wire open
5 V reference or ground of the sensor open
Sensor faulty (output does not switch)
Signal wire shorted to positive

Symptoms

  • Check engine light on
  • Longer cranking before the engine starts
  • Loss of power or rough idle (exhaust cam timing in its base position)

Repair estimate

DifficultyEasyDIY possible
Parts and labour€30–250
Time0.3–1.5 h

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

Parts involved

camshaft position sensor exhaustcamshaft tone wheelsensor wiringengine control module

Related codes

P0365P0366P0367P0393P0651

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