P2471 — Exhaust gas temperature sensor circuit high, bank 1, sensor 4

The controller reports an electrical input above the calibrated threshold in the specified exhaust-gas temperature sensor circuit. A high electrical signal is not necessarily a high physical exhaust temperature and does not identify a failed sensor by itself. Interpret voltage and live data using the manufacturer wiring diagram and specifications. This code identifies bank 1, sensor 4; sensor numbering can differ from the physical order on a specific vehicle.

Affected system: Exhaust gas temperature monitoring

Symptoms

• Warning light may illuminate
• Related system function may be impaired
• Vehicle-specific symptoms vary

Possible causes

• Exhaust or emissions plumbing leak, restriction, valve fault, sensor fault, or damaged wiring
• Related wiring, connector, power or ground fault
• Vehicle-specific mechanical or control issue

What to check

• Record stored and pending codes and freeze-frame data
• Inspect the relevant exhaust or emissions plumbing and electrical connections, then compare commanded operation with sensor feedback during the enable conditions.
• Confirm measured values against the vehicle service information
• Retest under the conditions that set the code
• Inspect the relevant exhaust or emissions plumbing and electrical connections, then compare commanded operation with sensor feedback during the enable conditions.
• Repair the verified cause and confirm the code does not return

Also written as: P2471-00, P247100 (some scan tools add the fault-type byte, e.g. -00).