P2031Emissions / Exhaust

Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 2

P2031 means the ECM detected a general circuit fault with the exhaust gas temperature sensor for Bank 1 Sensor 2. This sensor helps protect the catalyst and DPF. Causes include a failed sensor, heat-damaged wiring, or a connector problem.

🚗 Yes, but exhaust temperature monitoring may be affected until repaired.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Failed EGT sensor$60-$300

40%

The sensor no longer provides a valid signal.

#2Heat-damaged wiring near the exhaust$50-$250

30%

High heat breaks down insulation and connections.

#3Corroded or loose connector$40-$150

20%

A poor connection interrupts the sensor circuit.

#4ECM or reference issue$100-$500

10%

Rare control or reference voltage fault.

🩺 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

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose P2031

1Scan for related EGT codes and check freeze frame

2Inspect the sensor wiring and connector for heat damage

3Test the EGT sensor resistance and signal

4Compare readings to a known good sensor

❓ Frequently Asked Questions

Can I drive with a P2031 code?

Short-term yes, but exhaust temperature monitoring may be affected. Repair it soon.

How much does it cost to fix P2031?

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

What is the most common cause of P2031?

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

🔗 Related Codes

P2080P2084P2002P0420P242F