SES Light Due to a P1182 DTC - keywords 01997244 09359409 12580698 air BARO CEL check element engine filter MAP MIL repeat SCIAP SCIP sensor supercharger

This PI has been revised to include SCIP sensor parts information. Please discard PIP3512E.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

On rare occasions, a SES Light may be experienced due to a P1182 DTC. Typically, there will not be any engine performance concerns reported.

If the P1182 SI diagnostics do not isolate a cause for this concern, the following information may help:

1. Review the freeze frame data to determine when the DTC set.

1.1.	If the P1182 sets at or near idle, it is most likely due to carbon build up in the throttle body. Clean the throttle body by following the "Throttle Body Cleaning Procedure" in SI.

1.2.

If the P1182 sets at a steady cruise, it is most likely due to an air intake leak or restriction causing the MAF, MAP, and/or SCIP sensor input to vary from the expected value. Inspect the air filter to ensure that it is a factory filter and that it is not dirty or damaged. If any concerns are noted, replace the air filter. Inspect all air intake snorkel connections and clamps to ensure that the air intake system is installed properly. Typically, the Long Term Fuel Trim will be greatly positive when the DTC sets if the engine is drawing in unmetered air due to an air intake leak after the MAF sensor.

2. If the information above does not isolate a cause for this concern, the accuracy of the BARO, MAP, and SCIP sensors should be confirmed with a Tech 2. The values below were taken from a known good vehicle around 740 feet above sea level (values will vary with altitude change).

Key On Engine Off:

-	BARO - 2.29 Volts - 98 KPA

-	MAP - 1.84 Volts - 98 KPA

-	SCIP - 2.33 Volts - 98 KPA

Hot Idle with AC Off:

-	BARO - 2.29 Volts - 98 KPA

-	MAP - .71 Volts - 36 KPA

-	SCIP - .69 Volts - 36 KPA

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If the SCIP sensor voltage is approximately half of the SCIP voltage listed above, the wrong SCIP sensor was most likely installed during a previous repair. When ordering a SCIP sensor, the terminology in the parts catalog does not match SI. As a result, the wrong sensor may have been ordered and installed during a previous repair. The SCIP sensor is mounted on top of the supercharger with part number 09359409 stamped on it and it contains a 3 wire connector. Inspect the part number stamped on the SCIP sensor to ensure that it is part number 09359409. If not, replace the SCIP sensor with part number 09359409 (or any future part number).

3. If the P1182 did not occur until recent engine repairs, the following information may also help:

3.1.	Inspect the vacuum hoses at the Bypass Valve Actuator to ensure proper installation. The hose attached to the top port of the actuator should be attached to the supercharger and the hose attached to the bottom port of the actuator should be attached to the Boost Control Solenoid.

3.2.	Inspect the Bypass Valve Actuator Linkage to ensure that it is not damaged or modified and repair as necessary.

3.3.	Verify proper installation of the cam sensor housing. The cam sensor housing and shaft should be aligned as shown below and carefully installed with #4 piston at top dead center on the compression stroke. If further details are necessary, refer to the procedure listed in 04-06-01-026.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.