P2B6E Turbocharger/Supercharger A Temperature Sensor Circuit

P2B6E is the general circuit code for temperature sensor A on the turbocharger or supercharger. SAE J2012 names the sensor but leaves its measuring point open, so the manufacturer decides what it watches, and no manufacturer documents this exact code publicly. The engine computer reports P2B6E when the signal is missing or implausible without being clearly low or clearly high, typically an intermittent open circuit or a corroded connector. CARB 13 CCR 1968.2 (e)(15) calls for circuit checks on powertrain input sensors and names turbocharger electronics among monitored parts. GM's patent US11060525B2 shows, using compressor outlet temperature, how such a value protects the charger by trimming boost and how a sensor fault disables that function. Out-of-range codes are P2B6F and P2B70; sensor B has P2B8F.

Likely causes

Symptoms

• Warning lamp with stored code
• Implausible or jumping turbo temperature value in live data

Repair estimate

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

Related codes

References: law.cornell.edu, patents.google.com.