Checks
| Action
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DEFINITION: The engine delivers less than expected power. There is little or no increase in speed when partially applying the accelerator pedal.
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Preliminary Checks
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| • | Compare the vehicle with a similar unit. Ensure the vehicle has an actual problem. |
| • | Remove the air filter and check for dirt, or for air ducts being plugged or restricted. Replace as necessary. |
| • | Inspect for a proper transmission shift pattern and down shift operation. |
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Fuel System Checks
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| • | Check the fuel pressure to the fuel injection pump. Fuel is under vacuum. If the pressure drops, a restriction exists in the fuel supply lines between the pump and the fuel tank. |
| • | Inspect the fuel injection pump operation. |
| • | Inspect for restricted or plugged fuel injectors. |
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Exhaust System Checks
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| • | Inspect the exhaust system for leaks. |
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Air Intake System Checks
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| • | Inspect for an air leak or restriction in the air inlet ducts or the intake manifold. Refer to
DTC P0234
. |
| • | Inspect for an air leak or restriction in the charged air cooler. |
| • | Inspect for a worn or damaged turbo charger turbine wheel, shaft or compressor wheel. |
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Engine Mechanical Check
| Inspect the engine for the following conditions:
| • | Improper valve timing |
| • | Improper or worn camshaft |
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Additional Checks
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| • | Inspect the control module grounds for being clean, tight, and in their proper location. |
| • | Inspect the torque converter clutch (TCC) operation. |
| • | Inspect the generator output voltage. Repair if less than 9 volts or more than 16 volts. |
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