Powertrain, generic · Ignition system or misfire

P0365 Camshaft Position Sensor B Circuit 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. P0365 means no or too few exhaust cam pulses arrive while the crankshaft turns in sync. GM sets it after 4 s of cranking or 5.5 s without a cam pulse, or fewer than 4 pulses in 3 s running, 8 of 10 samples, after two trips; on GM's 3.6-litre V6 (Saab 9-4X) also with no pulse in 800 of 1,000 engine cycles. Ford checks the ratio of crank to cam events from 200 rpm, detected within 5 s, and collects all electrical faults here. The exhaust phaser then goes to its park position; the engine keeps running but cranks longer and loses some power. FCA advises saving the cam/crank synchronisation data before replacing the sensor, as the fault is often elsewhere.

Likely causes

Exhaust camshaft position sensor faulty
Connector or wiring open or corroded, 5 V reference missing
Oil in the connector from a leaking sensor O-ring
Tone wheel on the exhaust phaser damaged or loose
Engine module (5 V supply)

Symptoms

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

Repair estimate

DifficultyEasyDIY possible
Parts and labour€60–250
Time0.3–1 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

P0366P0367P0368P0369P0390P0340

References: gsi.ext.gm.com, saabwisonline.com, fordservicecontent.com, newtonnet.co.uk.