OBDII Code List

P1437 MERCURY - A/C Evaporator Air Temperature Circuit High

Repair Importance Level: 1/3
Repair Difficulty Level: 3/3  What does this mean?

P1437 MERCURY Possible Causes

  • Faulty A/C Evaporator Air Temperature (ACET) Sensor
  • Evaporator Temperature Sensor harness is open or shorted
  • Evaporator Temperature Sensor circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

First diagnose P1437 MERCURY code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

Cost of diagnosing the P1437 MERCURY code

    Labor: 1.0

    The cost of diagnosing the P1437 MERCURY code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

P1437 MERCURY Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1437 MERCURY Meaning

The Powertrain Control Module (PCM) detects the evaporator control circuit had a high voltage condition. The PCM sources a low current 5 volts on the A/C Evaporator Air Temperature (ACET) circuit (this voltage can be measured with the sensor disconnected). As A/C evaporator air temperature changes, the ACET circuit resistance to SIG RTN (ground) changes (which changes the voltage the PCM detects). When the ACET signal is detected above the Self-Test maximum, check for open circuits (ACET or SIG RTN), which would cause the voltage to remain high. Although not as probable, also check for a short to power (VREF).
OBDII Code P1437 MERCURY - A/C Evaporator Air Temperature Circuit High - Engine-Codes.com

P1437 MERCURY More Information

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