P1428 Cadillac 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 Cadillac 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 Cadillac 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 Cadillac?
- 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 Cadillac?
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 Cadillac 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 Cadillac Code
1. What are the common symptoms of OBDII code P1428 in a Cadillac related to the EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible issue?
- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.
2. What are the possible causes of OBDII code P1428 in a Cadillac related to the EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible issue?
- Possible causes include a faulty EGR temperature sensor, issues with the intake air temperature sensor, wiring problems, or a malfunctioning EGR valve.
3. How can I diagnose the OBDII code P1428 in a Cadillac related to the EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible issue?
- Diagnosis involves using an OBDII scanner to retrieve the fault code, inspecting the EGR and intake air temperature sensors, checking for wiring issues, and testing the EGR valve.
4. Can I continue driving my Cadillac with OBDII code P1428 related to the EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible issue?
- It is not recommended to drive the vehicle with this fault code as it can lead to further engine damage and potential safety issues.
5. How can I repair OBDII code P1428 in a Cadillac related to the EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible issue?
- Repair options include replacing the faulty EGR temperature sensor, addressing any issues with the intake air temperature sensor, repairing or replacing damaged wiring, or servicing the EGR valve.
6. Are there any DIY tips for fixing OBDII code P1428 in a Cadillac related to the EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible issue?
- DIY enthusiasts can start by checking the sensor connections, cleaning any dirt or debris around the sensors, and inspecting the wiring for any visible damage before considering sensor replacement.
7. How much does it typically cost to repair OBDII code P1428 in a Cadillac related to the EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible issue?
- The cost of repair can vary depending on the exact cause of the issue, but it generally ranges from $200 to $500, including parts and labor.
8. Can a faulty EGR Temperature Sensor cause other issues in a Cadillac besides triggering OBDII code P1428?
- Yes, a faulty EGR temperature sensor can cause a variety of issues such as poor engine performance, increased emissions, and potential damage to other engine components over time.
9. How long does it typically take to repair OBDII code P1428 related to the EGR Temperature Sensor issue in a Cadillac?
- The repair time can vary depending on the complexity of the issue and the availability of parts, but it usually takes a few hours to complete the repair.
10. Will resetting the fault code temporarily resolve OBDII code P1428 in a Cadillac related to the EGR Temperature Sensor 1 Intake Air Temperature 2 Not Plausible issue?
- Resetting the fault code may temporarily turn off the check engine light, but it will not fix the underlying issue causing the fault code to reappear. It is important to diagnose and repair the problem to prevent further issues.
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