P227C Code - Barometric Pressure Sensor 2 Circuit Low Voltage
Quick Answer
The Barometric Pressure (BARO) Sensor 2, also referred to as the Turbocharger Inlet Air Pressure (TCIAP) sensor, is integral to the Multifunction Intake Air Sensor and is used for humidity sensor signal correction. Common causes include Faulty Multifunction Intake Air Sensor, Multifunction Intake Air Sensor harness is open or shorted, Multifunction Intake Air Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P227C indicates Barometric Pressure Sensor 2 Circuit Low Voltage.
- Common causes
- Common causes include Faulty Multifunction Intake Air Sensor, Multifunction Intake Air Sensor harness is open or shorted, Multifunction Intake Air Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P227C Description
- Intake Air Temperature (IAT) Sensor 1
- IAT Sensor 2
- Humidity Sensor
- Mass Air Flow (MAF) Sensor
- Turbocharger Inlet Air Pressure (TCIAP) Sensor (BARO 2)
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the BARO sensor pressure is less than 44 kPa (6.4 PSI) for greater than 5 s.
What are the Possible Causes of the DTC P227C?
- Faulty Multifunction Intake Air Sensor
- Multifunction Intake Air Sensor harness is open or shorted
- Multifunction Intake Air Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P227C?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P227C code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P227C Buick — Barometric Pressure Sensor 2 Circuit Low Voltage
- P227C Cadillac — Barometric Pressure Sensor 2 Circuit Low Voltage
- P227C Chevrolet — Barometric Pressure Sensor 2 Circuit Low Voltage
- P227C GMC — Barometric Pressure Sensor 2 Circuit Low Voltage
Frequently Asked Questions about P227C Code
1. What are common symptoms of OBDII code P227C (Barometric Pressure Sensor 2 Circuit Low Voltage)?
- Common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the Check Engine Light.
2. What are possible causes of OBDII code P227C?
- Possible causes include a faulty barometric pressure sensor, damaged wiring or connectors, low engine vacuum, or a problem with the engine control module.
3. How can I diagnose OBDII code P227C?
- Diagnosis typically involves using an OBDII scanner to retrieve the code, checking the barometric pressure sensor's readings, inspecting the sensor's wiring, and performing a vacuum test.
4. What is the role of the barometric pressure sensor in the vehicle's operation?
- The barometric pressure sensor helps the engine control module adjust air/fuel mixture and ignition timing based on changes in atmospheric pressure, ensuring optimal engine performance.
5. Can I drive my vehicle with OBDII code P227C present?
- It is generally not recommended to drive with this code active, as it can lead to reduced engine efficiency and potentially cause further damage if left unresolved.
6. How do I repair OBDII code P227C?
- Repair involves identifying and addressing the root cause, such as replacing the faulty sensor, repairing damaged wiring, or addressing any underlying issues affecting engine vacuum.
7. Can a DIY enthusiast fix OBDII code P227C at home?
- Depending on their skill level and access to tools, DIY enthusiasts may be able to address this code by following repair guides and using the necessary diagnostic equipment.
8. How long does it typically take to repair OBDII code P227C?
- The repair time can vary based on the specific cause of the code and the complexity of the repair, ranging from a quick sensor replacement to a more involved troubleshooting process.
9. Will clearing the OBDII code P227C make it go away permanently?
- Clearing the code without addressing the underlying issue will not resolve the problem permanently, as the Check Engine Light is likely to reilluminate once the issue persists.
10. Is it necessary to reset the vehicle's computer after repairing OBDII code P227C?
- It is recommended to reset the vehicle's computer after repairing the code to clear the fault codes and enable the system to monitor for any new issues effectively.
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