P1428 GMC Code - EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible
Quick Answer
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. Common causes include 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. 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
- P1428 GMC indicates EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible.
- Common causes
- Common causes include 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.
- 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 P1428 GMC Description
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.
What are the Possible Causes of the DTC P1428 GMC?
- 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 to Fix the DTC P1428 GMC?
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 P1428 GMC 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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Frequently Asked Questions about P1428 GMC Code
1. What are the common symptoms of OBDII code P1428 GMC (EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible)?
- Common symptoms include rough idling, decreased fuel efficiency, and potential stalling of the vehicle.
2. What can cause the OBDII code P1428 GMC to trigger?
- The code P1428 is typically triggered by a faulty EGR temperature sensor or a problem with the intake air temperature sensor.
3. How can I diagnose the issue causing the OBDII code P1428 GMC?
- You can diagnose the issue by using an OBDII scanner to read the code and then inspecting the EGR temperature sensor and intake air temperature sensor for any damage or malfunctions.
4. What are some possible repair tips for resolving the OBDII code P1428 GMC?
- Repair tips may include cleaning or replacing the EGR temperature sensor, checking the wiring connections, and ensuring the intake air temperature sensor is functioning properly.
5. Can I continue driving my vehicle with the OBDII code P1428 GMC active?
- It is not recommended to continue driving with the code active as it can lead to further engine problems and potential damage if left unresolved.
6. Are there any safety concerns associated with the OBDII code P1428 GMC?
- While the code itself may not pose immediate safety risks, ignoring the underlying issue could result in decreased performance and potential engine issues.
7. How much does it typically cost to repair the OBDII code P1428 GMC?
- The cost of repairing the code can vary depending on the specific cause of the issue, but it may range from a simple sensor replacement to more extensive diagnostic work.
8. Can a DIY enthusiast fix the OBDII code P1428 GMC at home?
- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address the issue by replacing the faulty sensors or checking the wiring connections.
9. What are the long-term effects of ignoring the OBDII code P1428 GMC?
- Ignoring the code can lead to decreased fuel efficiency, engine performance issues, and potential damage to other components over time.
10. How often does the OBDII code P1428 GMC (EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible) occur in GMC vehicles?
- The occurrence of this specific code can vary among GMC vehicles, but it is a relatively common issue that may require attention to ensure proper vehicle operation.
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