P2084Emissions / Exhaust

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2

P2084 means the exhaust gas temperature sensor for Bank 1 Sensor 2 is reporting a value outside the expected range. This sensor monitors temperature further down the exhaust for catalyst and DPF protection. Causes include a failed sensor, wiring issues, or an exhaust problem.

🚗 Yes, but exhaust temperature control and regeneration may be affected.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Failed EGT sensor$60-$300

40%

The Sensor 2 EGT reads out of range or inaccurately.

#2Wiring or connector fault near the exhaust$50-$250

30%

Heat-damaged wiring or corrosion skews the reading.

#3Exhaust leak or restriction$100-$500

20%

Leaks or restrictions change the measured temperature.

#4ECM or software issue$100-$500

10%

Rare control fault causing a range error.

🩺 Common Symptoms

Check engine light on
Possible reduced power or limp mode
DPF regeneration issues on diesels
May fail an emissions test

💰 Repair Cost: DIY vs Shop

DIY Cost

$50-$350

Shop Cost

$150-$600

📋 Free OBD2 Code Cheat Sheet

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🔧 How to Diagnose P2084

1Scan for related EGT and regeneration codes

2Compare Sensor 2 EGT readings to known good data

3Inspect wiring and connector for heat damage

4Check the exhaust for leaks or restrictions

❓ Frequently Asked Questions

Can I drive with a P2084 code?

Short-term yes, but regeneration and temperature control may be affected. Repair it soon.

How much does it cost to fix P2084?

A new EGT sensor with labor typically runs $150 to $600 at a shop.

What is the most common cause of P2084?

A failed EGT sensor or heat-damaged wiring are the most common causes.

🔗 Related Codes

P2080P2002P2000P0420P242F