P1106 CHEVROLET Possible Causes
- Faulty Manifold Absolute Pressure (MAP) sensor
- Manifold Absolute Pressure (MAP) sensor harness is open or shorted
- Poor electrical connection in the Manifold Absolute Pressure (MAP) sensor circuit
How to Fix Code P1106 CHEVROLET?
Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
When is the Code Detected?
If the Powertrain Control Module (PCM) detects a Manifold Absolute Pressure (MAP) sensor signal voltage that is intermittently high, code P1106 will be set.
Symptoms
Possible
Engine Light On (or Service Engine Soon Warning Light)
Engine Rough Idle
Engine Hesitation
P1106 CHEVROLET Meaning
The Manifold Absolute Pressure (MAP) sensor responds to changes in intake manifold pressure. Pressure changes occur based on engine load. The MAP sensor has the following circuits:
– 5 Volt Reference Circuit
– Low Reference Circuit
– MAP Sensor Signal Circuit
The Powertrain Control Module (PCM) supplies 5 volts to the MAP sensor on the 5 Volt Reference Circuit. The PCM also provides a ground on the Low Reference Circuit. The MAP sensor provides a signal to the PCM on the MAP Sensor Signal Circuit that corresponds to pressure changes in the manifold. The PCM should detect a low signal voltage at low MAP, such as during idle or deceleration. The PCM should detect a high signal voltage at high MAP, such as when the ignition is ON with the engine off, or at wide open throttle (WOT). The MAP sensor is also used to determine barometric pressure (BARO). This occurs when the ignition switch is turned ON with the engine stopped. The BARO reading may also be updated whenever the engine operates at WOT. The PCM monitors the MAP sensor signal for voltage outside the normal range.