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Diagnostic is a diagnostic trouble code (DTC) for "Trouble Code (DTC) P1109 - BARO Sensor Circuit Out of Range High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P1109 code is a manufacturer-specific fault code. It means that the engine control module (ECM) has detected a signal voltage from the barometric (BARO) pressure sensor that is out of the predetermined range.
Because this is a manufacturer-specific code, each automaker may have a slightly different definition, steps for diagnosis, and repair information. Automakers with a P1109 trouble code include, but are not limited to Audi, Citroen/Peugeot, Daewoo, Fiat, Ford, General Motors, Lincoln, Mercury, Mini, Oldsmobile, Volkswagen, and Volvo.
Codes related to the P1109 include:
For most automakers, a code P1109 will be stored when the wrong manifold air pressure (MAP) sensor voltage reading is detected for a preset amount of time, typically four seconds.
A vehicle’s MAP and BARO sensor work to provide the ECM with information related to the amount or degree of air pressure, or vacuum, that is in the intake manifold at a given point in time. The ECM will then use the data to help calculate the best fuel delivery strategy for the most efficient engine operation.
Several problems may cause a P1109 code including:
Symptoms of a P1109 code may include:
A mechanic may use several methods to diagnose a P1109 trouble code, including:
It is possible to misdiagnose the cause of a P1109 code to be either the MAP or BARO sensor, when the true problem is related to electrical wiring and circuitry.
Because a vehicle’s safe driving operation most likely will not be impacted due to faults that store a P1109 code, this code is not considered a potentially serious code. When this code appears, it is recommended to take your vehicle to your local service center or mechanic for repair and diagnosis as soon as you can.
Several repairs can fix a P1109 trouble code and include:
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