Powertrain, generic · Ignition system or misfire

P0346 Camshaft Position Sensor A Circuit Range/Performance Bank 2

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0346 is the bank 2 counterpart of P0341: the intake camshaft sensor on the side without cylinder 1 delivers pulses, but their number or pattern does not fit the crankshaft. GM applies the same counting criteria as for P0341, e.g. on the 3.0 twin-turbo V6 (LGW): 4 to 6 pulses in the first 12 reference events and 398 to 402 per 100 engine cycles on the 4X wheel, set after two trips. On the Saab 9-4X V6 (GM LAU) the code means too many or too few pulses per crank revolution, or no correlation with crank position, for more than 1 s or 10 s cumulatively, also after two trips. Ford petrol engines do not use the code and report such faults under P0349. Result: cam timing on bank 2 switched off, loss of power, rough running.

Likely causes

Bank 2 sensor with disturbed signal, air gap
Tone wheel on the bank 2 phaser damaged or wrongly fitted
Connector, wiring or interference
Crankshaft reference signal disturbed

Symptoms

  • Check engine light on
  • Longer cranking before the engine starts
  • Loss of power (cam timing held in its base position)
  • Rough idle, occasionally stalling

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–500
Time0.5–3 h

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

Parts involved

camshaft position sensorcamshaft tone wheelsensor wiringengine control modulecam phaser intake bank2

Related codes

P0341P0345P0349P0391P0018

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