P2EA6

Code

Generic P — Powertrain

Turbocharger Compressor Outlet Temperature Sensor Circuit

Brand: Generic

Type: P — Powertrain

Views: UK: 17 EN: 26 RU: 19

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Page language: EN

Causes

Open circuit in sensor wiring (broken wire, disconnected connector)
Short to ground or short to battery/ignition voltage in sensor harness
Corroded, loose or contaminated connector terminals
Failed compressor outlet temperature sensor (thermistor/thermocouple failure)
Water or oil contamination of sensor or connector
Damaged or chafed wiring near turbocharger (heat damage)

Symptoms

Check Engine Light (CEL)/Malfunction Indicator Lamp (MIL) illuminated
Reduced engine power or limp-home mode
Incorrect boost control behavior or reduced turbo performance
Unstable idle or drivability complaints under load
Stored related fault code(s) and possibly reduced fuel/ignition adjustments

What to check

Retrieve freeze frame and live data for compressor outlet temperature and related sensors
Visually inspect sensor, wiring harness, and connector for heat damage, oil/contamination, or corrosion
Check that connector is fully seated and locking tabs intact
Measure sensor supply reference voltage at the connector (typically 5 V reference) with ignition ON
Measure sensor signal voltage with ignition ON and engine running (compare to live data)
Check continuity and resistance of sensor wiring from sensor connector to ECM connector with ignition OFF

Signal parameters

Reference supply: commonly 5 V (verify exact vehicle spec)
Signal voltage range: typically about 0.1–4.9 V (varies with temperature and sensor type)
Expected idle/ambient: mid-range voltage (example ~2.5 V at ~20–25°C) — consult vehicle spec
Typical thermistor resistance vs temperature: resistance decreases with increasing temperature (NTC). Example: several kΩ at 20°C to a few hundred ohms at high temps (manufacturer-specific)
Open-circuit: signal voltage may float to supply rail or 0 V; short-to-ground: ~0 V; short-to-batt: ~supply voltage

Diagnostic algorithm

Read and record freeze frame and live data for the compressor outlet temperature sensor and related inputs (IAT, ECT, boost pressure).
Perform a visual inspection of the sensor, connector, and wiring for heat damage, oil/soot contamination, corrosion, or signs of chafing near the turbocharger and intercooler piping.
With ignition OFF, disconnect the sensor. Inspect terminals for corrosion; clean or replace connector if damaged.
Measure resistance of the sensor at the connector (manufacturer specification required). Compare resistance to expected values for ambient temperature; if out of range, replace sensor.
With ignition ON (engine OFF), verify the ECM reference voltage and ground at the sensor connector. If reference or ground missing, trace back to ECM and repair wiring or grounds.
With the sensor connected, backprobe the signal wire with ignition ON and while warming engine. Monitor signal voltage — it should change as intake/charge-air temperature changes. Use hot/cold exposure (room-temp to warmed air) or compare to ambient to confirm sensor response.
Perform continuity and short checks between the sensor signal, reference, ground wires and the ECM connector pins. Repair any opens/shorts found.
If wiring and sensor are good, substitute known-good sensor or harness or test ECM outputs. If ECM faults likely, follow manufacturer procedure for module testing/repair.
Clear codes and perform a test drive; confirm code does not return and related sensor data behaves normally.

Likely causes

Wiring damage/connector corrosion due to proximity to turbocharger
Sensor element failure (thermistor short/open or out-of-spec)
Connector pushed out or not fully seated after service
Short to voltage from nearby high-temp components or harness abrasion

Fault status

⚠️ Status

Turbocharger Compressor Outlet Temperature Sensor Circuit - Open, short to ground, short to voltage, intermittent or implausible signal detected. Check sensor, connector, wiring, and ECM inputs.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours