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Intake Manifold Pressure Sensor Circuit
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 122 PID: P102 SPN: 102 FMI: 3/3 LAMP: Yellow SRT: |
High voltage detected at the intake manifold pressure sensor circuit. |
Derate in power output of the engine. |
 Intake Manifold Pressure Sensor Circuit
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Circuit Description
The intake manifold pressure sensor monitors intake manifold pressure and passes information to the electronic control module (ECM) through the
engine harness. If the intake manifold pressure becomes too high, it will cause a derate condition.
Component Location
The intake manifold pressure sensor is located in the air intake manifold toward the front of the engine.
Shop Talk
- Determine if engine is being overfueled.
- Confirm that the correct intake manifold pressure sensor part number is being used.
- Confirm that the correct turbocharger is being used.
- If it is suspected that cold intake air is the cause of the high intake manifold pressure, test the engine with warm intake air.
- Inspect the intake manifold pressure sensor circuit for signs of tampering. Remove any extra wires from the circuit.
Refer to Troubleshooting Fault Code t05-122
Last Modified: 02-Sep-2010
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