What Does P2034 Mean?
The PCM has detected an electrical circuit malfunction with the exhaust gas temperature sensor located after the catalytic converter on Bank 2. This affects V6 or V8 engines with dual exhaust banks.
Common Causes
40%
EGT sensor Bank 2 failure or internal circuit fault
30%
Damaged wiring or corroded connector at Bank 2 EGT sensor
15%
Poor ground connection for Bank 2 sensor circuit
10%
Exhaust leak near Bank 2 sensor location
5%
PCM internal fault on Bank 2 sensor circuit
Diagnostic Steps
1
Step 1: Locate Bank 2 EGT sensor (opposite side from cylinder 1) and inspect connector
2
Step 2: Measure sensor resistance and compare to temperature specification chart
3
Step 3: Test wiring continuity between sensor and PCM connector
4
Step 4: Verify sensor ground circuit with resistance test to known good ground
5
Step 5: Monitor sensor voltage during engine warm-up for proper temperature tracking
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
The PCM has detected an electrical circuit malfunction with the exhaust gas temperature sensor located after the catalytic converter on Bank 2. This affects V6 or V8 engines with dual exhaust banks.
The most common cause of P2034 (Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 2) is: EGT sensor Bank 2 failure or internal circuit fault
Typical repair costs for P2034 range from $150 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains drivable but emissions monitoring is impaired. May cause Bank 2 catalytic converter damage if left unrepaired due to improper temperature monitoring.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2034 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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