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Engine Overspeed
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 234 PID: P190 SPN: 190 FMI: 0/0 LAMP: Red SRT: |
Engine speed signal indicated engine speed is greater than 2650 rpm. |
Fuel shutoff valve closed until the engine speed falls to 2000 rpm. |
 Engine Overspeed Circuit
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Circuit Description
The crankshaft and camshaft engine speed/position sensor provides engine speed and position information to the electronic control module (ECM) through the engine harness.
Component Location
The crankshaft engine speed/position sensor is located in the front cover on the intake side of the engine.
The camshaft engine speed/position sensor is located on the intake side of the cylinder head.
Shop Talk
Possible causes of this fault code include external fuel sources drawn into the intake air passage, reverse powering (motoring) of the engine, and 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: 26-Oct-2010
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