P1405 1999 Ford F150 Code - DPF EGR Sensor Circuit High Voltage Detected
Quick Answer
The purpose of the Exhaust Gas Recirculation (EGR) system on your engine is to limit oxides of nitrogen (NOx) emissions. Common causes include Faulty Differential Pressure Feedback Electronic (DPFE) sensor (EGR pressure sensor), Plugged or damaged EGR tube, Differential Pressure Feedback Electronic (DPFE) sensor harness is open or shorted. 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
- P1405 1999 Ford F150 indicates DPF EGR Sensor Circuit High Voltage Detected .
- Common causes
- Common causes include Faulty Differential Pressure Feedback Electronic (DPFE) sensor (EGR pressure sensor), Plugged or damaged EGR tube, Differential Pressure Feedback Electronic (DPFE) sensor harness is open or shorted.
- 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 P1405 1999 Ford F150 Description
The Ford DPFE/EGR system is controlled by the Powertrain Control Module (PCM). The system employs an EGR Valve, an Electronic Vacuum Regulator (EVR), and a Delta Pressure Feedback EGR sensor (DPFE).
The DPFE Sensor measures EGR flow across an orifice located inside the special EGR Tube. The orifice is positioned between two hose ports coming off the tube which is connected to the DPFE sensor with special heat-resistant hoses. When the EGR Valve is open, a pressure differential is created across the orifice (intake manifold pressure vs. exhaust pressure). By design, this difference in pressure is measured by the DPFE sensor in terms of voltage. The DPFE voltage signal output to the PCM is directly proportional to the flow of exhaust gas entering the intake manifold.
What are the Possible Causes of the DTC P1405 1999 Ford F150?
- Faulty Differential Pressure Feedback Electronic (DPFE) sensor (EGR pressure sensor)
- Plugged or damaged EGR tube
- Differential Pressure Feedback Electronic (DPFE) sensor harness is open or shorted
- Differential Pressure Feedback Electronic (DPFE) sensor circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC P1405 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 P1405 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 P1405 1999 Ford F150 Code
1. What does the OBDII code P1405 on a 1999 Ford F150 mean?
- The code P1405 indicates that the DPF EGR sensor circuit has detected high voltage.
2. What are the common symptoms of a P1405 DPF EGR sensor circuit high voltage issue on a 1999 Ford F150?
- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potentially the illumination of the Check Engine Light.
3. What are the possible causes of a P1405 DPF EGR sensor circuit high voltage issue on a 1999 Ford F150?
- Causes can include a faulty DPF EGR sensor, damaged wiring or connectors in the sensor circuit, or a problem with the EGR valve itself.
4. How can I diagnose a P1405 DPF EGR sensor circuit high voltage issue on a 1999 Ford F150?
- Diagnosis typically involves checking the DPF EGR sensor for proper operation, inspecting the sensor wiring and connectors for damage, and testing the EGR valve for functionality.
5. What are some repair tips for addressing a P1405 DPF EGR sensor circuit high voltage issue on a 1999 Ford F150?
- Repair tips may include replacing the DPF EGR sensor if faulty, repairing any damaged wiring or connectors, and cleaning or replacing the EGR valve if necessary.
6. Can a P1405 DPF EGR sensor circuit high voltage issue on a 1999 Ford F150 cause further damage if not addressed promptly?
- Ignoring this issue can potentially lead to reduced engine efficiency, increased emissions, and further damage to related components such as the EGR system.
7. Is it safe to continue driving a 1999 Ford F150 with a P1405 DPF EGR sensor circuit high voltage issue?
- While the vehicle may still be operable, it is recommended to address the issue promptly to prevent any potential long-term damage and to maintain optimal performance.
8. How much does it typically cost to repair a P1405 DPF EGR sensor circuit high voltage issue on a 1999 Ford F150?
- The cost of repairs can vary depending on the exact cause of the issue, but it may involve a sensor replacement, wiring repairs, or EGR valve maintenance, which can range from moderate to high in cost.
9. Can a DIY enthusiast fix a P1405 DPF EGR sensor circuit high voltage issue on a 1999 Ford F150?
- Depending on the DIY skills and tools available, some enthusiasts may be able to address this issue themselves by following repair guides or consulting with experienced professionals for guidance.
10. How often does a P1405 DPF EGR sensor circuit high voltage issue occur in a 1999 Ford F150?
- The occurrence of this specific issue can vary, but it is not uncommon in vehicles of this age and may require periodic inspection and maintenance to prevent reoccurrence.
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