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P1183 Cadillac Code - Supercharger Inlet Pressure Sensor Circuit Low Voltage

- Code Popularity: 1,095 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P1183 Cadillac?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Supercharger Inlet Pressure (SCIP) Sensor
  • Supercharger Inlet Pressure (SCIP) Sensor harness open or shorted
  • Supercharger Inlet Pressure (SCIP) Sensor circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)
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How to Fix the DTC P1183 Cadillac?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1183 Cadillac code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P1183 Cadillac Description

The Supercharger Inlet Pressure (SCIP) Sensor measures both the atmospheric pressure and the vacuum that exists, under different operating conditions, in the supercharger intake plenum. The plenum volume between the throttle body and the supercharger is where this sensor is located, and for the purpose of this diagnostic, this area is considered to be the intake manifold. The SCIP sensor has the following types of circuits:
- A Powertrain Control Module (PCM) supplied and regulated 5-volt reference circuit
- A PCM supplied ground for the low reference circuit
- A sensor signal circuit that supplies a voltage input to the PCM
The diaphragm within the SCIP sensor responds to the pressure changes in the intake manifold, and provides a signal voltage to the PCM on the signal circuit, relative to those pressure changes.
The PCM monitors the SCIP sensor signal for voltage that is outside of the normal range of a properly operating sensor. If the PCM detects a SCIP sensor signal voltage that is excessively low, DTC P1183 sets.
OBDII Code P1183 Cadillac - Supercharger Inlet Pressure Sensor Circuit Low Voltage - AutoCodes.com
P1183 Cadillac Code - Supercharger Inlet Pressure Sensor Circuit Low Voltage

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Code P1183 Cadillac comments

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