Back to 2015 Cadillac SRX

2015 CADILLAC SRX

3.0L V6AWDAUTOMATICgas
3 active safety recalls on this vehicle — view recalls
Repairs0Labor515Torque4985Fluid9DTC959Battery0Maintenance0Recalls3
P1115moderate severityPowertrain

ECT Sensor Circuit Intermittent High Voltage

on 2015 Cadillac SRX 3.0L V6 · AWD

What this code means

The PCM detected intermittent high voltage on the Engine Coolant Temperature sensor circuit, indicating the sensor is sporadically reporting very low temperatures.

Symptoms

  • Check Engine Light
  • Rich running condition
  • Poor fuel economy
  • Cooling fans not activating when needed

Common causes

  • Intermittent open in ECT circuit
  • Loose ECT connector
  • Faulty ECT sensor
  • Corroded terminals

Diagnostic steps

  1. Monitor ECT readings for erratic spikes
  2. Wiggle test ECT connector
  3. Test sensor resistance across temperature range
  4. Check connector terminals

Repair notes

Clean and secure ECT connector. Replace sensor if faulty.

Other Powertrain codes on this vehicle

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