P0135 1999 Ford F150 Code - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1
Quick Answer
Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0135 1999 Ford F150 indicates O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0135 1999 Ford F150 Description
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
What are the Possible Causes of the DTC P0135 1999 Ford F150?
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0135 1999 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0135 1999 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 P0135 1999 Ford F150 Code
1. What are the common symptoms of OBDII code P0135 on a 1999 Ford F150?
- Common symptoms include poor fuel economy, rough idling, and the illumination of the Check Engine Light.
2. What does the O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1 mean for a 1999 Ford F150?
- This code indicates an issue with the oxygen sensor's heating element in the exhaust system of the first bank of cylinders.
3. What are the possible causes of the O2 Sensor Heater Circuit Malfunction in a 1999 Ford F150?
- Potential causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or a problem with the vehicle's computer.
4. How can I diagnose the OBDII code P0135 on my 1999 Ford F150?
- Diagnose the code by checking the oxygen sensor's wiring, testing the sensor's resistance, and inspecting the fuse related to the sensor heater circuit.
5. Can I still drive my 1999 Ford F150 with the P0135 code?
- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to prevent further damage and ensure optimal performance.
6. How do I repair the O2 Sensor Heater Circuit Malfunction on a 1999 Ford F150?
- The repair typically involves replacing the faulty oxygen sensor, repairing damaged wiring or connectors, and resetting the Check Engine Light after the issue is fixed.
7. Are there any tips for preventing the recurrence of the P0135 code on a 1999 Ford F150?
- Ensure proper maintenance of the vehicle, use high-quality oxygen sensors, and address any underlying issues promptly to prevent the code from reoccurring.
8. Can a DIY enthusiast fix the OBDII code P0135 on a 1999 Ford F150?
- Yes, a DIY enthusiast with some mechanical knowledge and the right tools can often diagnose and repair the O2 Sensor Heater Circuit Malfunction with guidance from repair manuals or online resources.
9. Will resetting the Check Engine Light resolve the P0135 code on a 1999 Ford F150?
- Resetting the Check Engine Light may temporarily turn it off, but it will not fix the underlying issue causing the O2 Sensor Heater Circuit Malfunction. The problem needs to be diagnosed and repaired.
10. Is it necessary to replace the oxygen sensor when dealing with the P0135 code on a 1999 Ford F150?
- In many cases, replacing the oxygen sensor is the most effective solution to resolve the O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1 on a 1999 Ford F150.
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