GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2006 🢒 CTS 🢒 Engine 🢒 Engine Controls - 6.0L 🢒 Symptoms - Sensors/Systems

Sensor/System

Symptoms

Sensor/System

Hard Start

Surges/Chuggles

Lack of Power, Sluggishness, or Sponginess

Hesitation, Sag, Stumble

Cuts Out, Misses

Poor Fuel Economy

Rough, Unstable, or Incorrect Idle and Stalling

Backfire
    • Inspect the mass air flow (MAF) sensor for proper installation, obstruction, contamination, and damage.
    • Inspect the manifold absolute pressure (MAP) sensor for proper installation, obstruction, and damage.

Lack of Power, Sluggishness, or Sponginess

Hesitation, Sag, Stumble

Cuts Out, Misses

Poor Fuel Economy

Rough, Unstable, or Incorrect Idle and Stalling

Detonation/Spark Knock

Backfire
    • Inspect for vacuum leaks and other unmetered air. Refer to Emission Hose Routing Diagram .
    • Test the engine coolant temperature (ECT) sensor for being shifted in value. Refer to the Temperature Versus Resistance .

Lack of Power, Sluggishness, or Sponginess

Surges/Chuggles

Cuts Out, Misses

Poor Fuel Economy

Rough, Unstable, or Incorrect Idle and Stalling

Backfire

Monitor the Knock Sensor (KS) System for excessive spark retard activity. Refer to the Knock Sensor description within in the Air Intake System Description .

Hesitation, Sag, Stumble

Inspect the accelerator pedal position (APP) sensor and the related wiring. Refer to Throttle Actuator Control (TAC) System Description .

Surges/Chuggles

Lack of Power, Sluggishness, or Sponginess

Hesitation, Sag, Stumble

Cuts Out, Misses

Poor Fuel Economy

Rough, Unstable, or Incorrect Idle and Stalling

Backfire

Inspect for contaminated oxygen sensor (O2S).

Hard Start

Surges/Chuggles

Lack of Power, Sluggishness, or Sponginess

Rough, Unstable, or Incorrect Idle and Stalling

Backfire
    • All except Hard Start--Inspect for exhaust leaks. Refer to Exhaust Leakage .
    • Inspect for restricted exhaust. Refer to Restricted Exhaust .

Poor Fuel Economy

Inspect for proper operation of the speedometer. Refer to Symptoms - Instrument Panel, Gages and Console .