P1436 1998 Ford F150 Code - A/C Evaporator Air Temperature Circuit Low
Quick Answer
The A/C Evaporator Temperature (ACET) sensor contains a thermistor which receives a reference voltage from the Powertrain Control Module (PCM). Common causes include Faulty A/C Evaporator Temperature (ACET) Sensor, A/C Evaporator Temperature Sensor harness is open or shorted, A/C Evaporator Temperature Sensor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P1436 1998 Ford F150 indicates A/C Evaporator Air Temperature Circuit Low.
- Common causes
- Common causes include Faulty A/C Evaporator Temperature (ACET) Sensor, A/C Evaporator Temperature Sensor harness is open or shorted, A/C Evaporator Temperature Sensor circuit poor electrical connection.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P1436 1998 Ford F150 Description
The PCM maintains evaporator core temperature and prevents icing of the evaporator core, by disengaging the A/C compressor clutch when the evaporator A/C Evaporator Temperature sensor reading falls below acceptable levels, and by engaging the A/C compressor clutch when the discharge air temperature rises above acceptable levels.
The A/C Evaporator Temperature sensor is located inside of the heater core and evaporator core housing in the air-stream leaving the evaporator core.
The Diagnostic Trouble Code (DTC) Indicates the ACET signal input is less than Self-Test minimum. The Self-Test minimum is 0.13 volts.
What are the Possible Causes of the DTC P1436 1998 Ford F150?
- Faulty A/C Evaporator Temperature (ACET) Sensor
- A/C Evaporator Temperature Sensor harness is open or shorted
- A/C Evaporator Temperature Sensor circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC P1436 1998 Ford F150?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1436 1998 Ford F150 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1436 1998 Ford F150 Code
1. What does the OBDII code P1436 mean on a 1998 Ford F150?
P1436 indicates a problem with the A/C Evaporator Air Temperature Circuit, specifically that the sensor is reading a temperature below the expected range.
2. What are the common symptoms of the P1436 code on a 1998 Ford F150?
Symptoms may include poor A/C performance, inconsistent cabin cooling, the A/C system shutting off intermittently, and the check engine light or an A/C system warning light being illuminated.
3. What causes the P1436 code to appear on a 1998 Ford F150?
The most common causes include a faulty A/C evaporator temperature sensor, damaged or corroded wiring or connectors in the circuit, or a failing A/C control module.
4. Can a dirty evaporator cause the P1436 code?
While unlikely, a dirty evaporator can indirectly contribute to sensor issues by affecting airflow and temperature readings. However, the primary cause is usually a faulty sensor or wiring.
5. How do you diagnose the P1436 code on a 1998 Ford F150?
Start by using a scan tool to confirm the code. Inspect the A/C evaporator temperature sensor, wiring, and connectors for damage or corrosion. Test the sensor’s resistance with a multimeter to ensure it’s functioning within specifications.
6. How do you fix the P1436 code on a 1998 Ford F150?
Repairs may involve replacing the A/C evaporator temperature sensor, repairing or replacing damaged wiring, or reprogramming the A/C control module if necessary.
7. Where is the A/C evaporator temperature sensor located on a 1998 Ford F150?
The A/C evaporator temperature sensor is typically located near the evaporator core, which is inside the HVAC housing behind the dashboard.
8. Can you drive with the P1436 code on a 1998 Ford F150?
Yes, you can drive the vehicle, but the A/C system may not function properly, leading to discomfort in hot conditions. It is best to address the issue promptly.
9. How much does it cost to repair the P1436 code on a 1998 Ford F150?
Repair costs can vary depending on labor rates and parts prices, but replacing the A/C evaporator temperature sensor typically costs between $100 and $300.
10. Do I need a professional mechanic to fix the P1436 code on my 1998 Ford F150?
If you are comfortable with basic electrical diagnostics and have the necessary tools, you may be able to repair it yourself. Otherwise, it’s advisable to consult a professional mechanic.
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