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FAULT CODE 234

Engine Crankshaft Speed/Position - Data Valid But Above Normal Operating Range - Most Severe Level

Overview


CODE

REASON

EFFECT

Fault Code: 234

Engine Crankshaft Speed/Position - Data Valid But Above Normal Operating Range -

Fuel injection disabled until engine

PID:

Most Severe Level. Engine speed signal indicates engine speed above engine

speed falls below the overspeed

SPN: 190

protection limit.

limit.

FMI: 0



LAMP: Red



SRT:



Engine Crankshaft Speed/Position Sensor Circuit


Circuit Description


The engine crankshaft speed/position sensor and the engine camshaft speed/position sensor provide engine speed and position information to the engine control module (ECM) through the engine harness.


Component Location


The engine crankshaft speed/position sensor is located on the intake side of the engine near the number 6 cylinder at the crankshaft centerline. The engine camshaft speed/position sensor is located above the fuel pump in the back of the gear housing.

Shop Talk


Possible causes of this fault code include:


  • External fuel sources drawn into the intake air passage

  • Reverse powering (motoring) of the engine

  • Tampering of the engine speed/position sensors.


Inspect the intake manifold for sources of flammable vapors. Check the turbocharger seals to verify that there are no oil leaks. Inspect the engine speed/position sensors for damage or tampering.


Refer to Troubleshooting Fault Code t05-234.


Last Modified: 28-Nov-2012

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