What Does P0547 Mean?
The ECM has detected a general malfunction in the exhaust gas temperature sensor circuit for Bank 2, Sensor 1, located upstream of the turbocharger or catalytic converter on the second cylinder bank. This is the Bank 2 equivalent of P0544 and indicates the sensor signal is outside the expected operating parameters. On V-type or boxer engines, Bank 2 is typically the side without cylinder #1.
Common Causes
40%
Failed exhaust gas temperature sensor on Bank 2 with internal open or short circuit from prolonged heat exposure
30%
Heat-damaged or melted wiring harness between the Bank 2 EGT sensor and ECM, especially near exhaust manifold or turbo
20%
Corroded or damaged connector at the Bank 2 EGT sensor from moisture and heat cycling
10%
ECM internal circuit fault on the Bank 2 EGT sensor analog input channel
Diagnostic Steps
1
Step 1: Locate the Bank 2 Sensor 1 EGT sensor. On V-type engines this is on the opposite bank from cylinder #1. Inspect the sensor, connector, and wiring for heat damage, melting, or corrosion.
2
Step 2: Disconnect the EGT sensor and measure resistance across the sensor terminals. Compare to the Bank 1 sensor reading and manufacturer specifications (typically 100-200 ohms at room temperature for NTC type).
3
Step 3: Check wiring continuity and isolation from the Bank 2 EGT sensor connector to the corresponding ECM pins. Verify no shorts to ground or battery voltage exist on either signal wire.
4
Step 4: With the engine warmed up, compare live data EGT readings between Bank 1 and Bank 2. Significant deviation (more than 50C at steady state) with verified good wiring suggests a sensor accuracy issue.
5
Step 5: If sensor and wiring are within specification, check the ECM connector for corrosion or backed-out pins on the Bank 2 EGT input channels. Replace the ECM only after all external circuits have been verified.
Estimated Repair Cost
$80 - $350
Parts + labor, varies by vehicle and location
The ECM has detected a general malfunction in the exhaust gas temperature sensor circuit for Bank 2, Sensor 1, located upstream of the turbocharger or catalytic converter on the second cylinder bank. This is the Bank 2 equivalent of P0544 and indicates the sensor signal is outside the expected opera...
The most common cause of P0547 (Exhaust Gas Temperature Sensor Circuit (Bank 2 Sensor 1)) is: Failed exhaust gas temperature sensor on Bank 2 with internal open or short circuit from prolonged heat exposure
Typical repair costs for P0547 range from $80 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Without proper Bank 2 EGT monitoring, the ECM cannot protect the Bank 2 turbocharger or catalytic converter from overheating. Extended driving may result in component failure and reduced engine performance.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0547 to identify the root cause.
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Quick Info
Category
Powertrain
System
Exhaust / Emission Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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