What Does P2484 Mean?
The signal from exhaust gas temperature sensor 5 on bank 1 is erratic or intermittent, indicating unstable readings. The PCM detects rapid, unexplained fluctuations in temperature readings or periodic loss of signal. This suggests an electrical connection issue or sensor on the verge of failure.
Common Causes
40%
Loose or corroded connector terminals causing intermittent contact
30%
Damaged wiring harness with intermittent short or open circuit
20%
Failing EGT sensor with intermittent internal failures
8%
Vibration-induced wiring damage in exhaust system mounting area
2%
Poor ground connection with intermittent contact
Diagnostic Steps
1
Step 1: Monitor live data while wiggling sensor connector and wiring harness to reproduce intermittent fault
2
Step 2: Inspect connector for signs of moisture intrusion, corrosion, or loose terminal fit
3
Step 3: Check wiring routing for contact with vibrating components or sharp edges that may cause intermittent shorts
4
Step 4: Perform voltage drop test on ground circuit while moving harness to identify poor connections
5
Step 5: If no wiring issues found, replace sensor as internal intermittent failures are difficult to test
Estimated Repair Cost
$175 - $680
Parts + labor, varies by vehicle and location
The signal from exhaust gas temperature sensor 5 on bank 1 is erratic or intermittent, indicating unstable readings. The PCM detects rapid, unexplained fluctuations in temperature readings or periodic loss of signal. This suggests an electrical connection issue or sensor on the verge of failure.
The most common cause of P2484 (Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 5) is: Loose or corroded connector terminals causing intermittent contact
Typical repair costs for P2484 range from $175 to $680, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe for continued driving, but intermittent faults can cause unpredictable emissions system behavior. May lead to unexpected limp mode activation during driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2484 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
