P1437 1997 FORD F150 - A/C Evaporator Air Temperature Circuit High
P1437 1997 FORD F150 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 1997 FORD F150 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.
P1437 1997 FORD F150 Tech NotesIndicates the ACET signal input is greater than Self-Test minimum. Self-Test maximum is 4.5 volts.
Cost of diagnosing the P1437 1997 FORD F150 code
Labor: 1.0The cost of diagnosing the P1437 1997 FORD F150 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 1997 FORD F150 Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1437 1997 FORD F150 MeaningThe Powertrain Control Module (PCM) detects the evaporator control circuit had a high voltage condition. The PCM sources a low current 5 volts on the 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).
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