P1428 Buick Code - EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible

Code P1428 Buick Possible Causes

• Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 1
• Exhaust Gas Recirculation Temperature Sensor 1 harness is open or shorted
• Exhaust Gas Recirculation Temperature Sensor 1 circuit poor electrical connection

How do I Fix the Code P1428 Buick?

Check 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's pins.

What is the Cost to Diagnose the Code P1428 Buick?

Labor: 1.0

The cost of diagnosing the P1428 Buick code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

What are Code P1428 Buick Possible Symptoms?

• Engine Light ON (or Service Engine Soon Warning Light)

Code P1428 Buick Description

The Exhaust Gas Recirculation (EGR) Temperature Sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the EGR cooler. The Engine Control Module (ECM) supplies 5 volts to the EGR temperature sensor signal circuit and a ground for the low reference circuit. When the EGR temperature sensor is cold, the sensor resistance is high. When the EGR temperature increases, the sensor resistance decreases. With high sensor resistance, the ECM detects a higher voltage on the EGR temperature signal circuit. With lower sensor resistance, the ECM detects a lower voltage on the EGR temperature signal circuit.
The Diagnostic Trouble Code (DTC) will be set if the ECM detects that the EGR cooler temperature sensor 1 or 2 is greater than 20°C (36°F) different from Intake Air Temperature (IAT) sensor 2.

Need More Information on the P1428 Buick Code?

Need more information on how to fix the P1428 Buick code? Get Access to Factory Service Manuals

Need Help with the P1428 Buick Code?

Get the P1428 Buick code diagnosed by a professional: Find a repair shop in your area

Related Information

• Find a Shop
• Car Questions
• Cars TSB
• Buick Recalls
• Buick Common Problems
• Buick Safety Rating
• Cars Technical Articles
• OBDII FAQ
• OBDII Components
• Car Glossary
• Car Warning Lights
• Buick MPG
• 2023 Cars MPG
• Car Test Game
• What is OBDII?
• How does the OBDII works?
• Why is the Engine Light ON?
• How to Reset MIL
• 5 Most Common Reasons for Check Engine Light
• Top 25 Engine Codes
• Latest 15 Codes Updated
• All OBDII Codes
• Powertrain (P) Codes
• Network (U) Codes
• Body (B) Codes
• Chassis (C) Codes

Code P1428 Buick comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P1428 Buick code? Have you replaced any parts?
Any information is appreciated. Thanks