What Does P2488 Mean?
The exhaust gas temperature sensor at Bank 2, Sensor 5 is providing readings that are outside expected parameters or not responding appropriately to exhaust temperature changes. The sensor signal is present but implausible or unresponsive.
Common Causes
40%
Failed or degraded EGT sensor with slow response time
25%
Exhaust leak near sensor affecting temperature readings
15%
Carbon buildup or contamination on sensor element
12%
Incorrect sensor installation or sensor not fully seated
8%
High resistance in wiring harness affecting signal accuracy
Diagnostic Steps
1
Step 1: Compare live data readings from all EGT sensors to identify if Bank 2 Sensor 5 readings are illogical compared to others
2
Step 2: Perform exhaust leak test around sensor location using smoke machine or visual/audible inspection
3
Step 3: Monitor sensor response time during engine warm-up and acceleration events; should respond within 2-3 seconds
4
Step 4: Remove sensor and inspect for carbon deposits, physical damage, or contamination on sensing element
5
Step 5: Check all wiring connections for high resistance using voltage drop testing under load conditions
Estimated Repair Cost
$200 - $800
Parts + labor, varies by vehicle and location
The exhaust gas temperature sensor at Bank 2, Sensor 5 is providing readings that are outside expected parameters or not responding appropriately to exhaust temperature changes. The sensor signal is present but implausible or unresponsive.
The most common cause of P2488 (Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 5) is: Failed or degraded EGT sensor with slow response time
Typical repair costs for P2488 range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe for continued driving but inaccurate temperature monitoring may lead to improper regeneration cycles. Could result in reduced engine performance or long-term emission system damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2488 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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