P02AD - OBD Trouble Code

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Is the car’s Check Engine Light On? Is there a sudden drop in the power and acceleration? Are you experiencing reduced fuel economy? All these can be due to problems with the fuel delivery system of the car thus leading to OBD code P02AD getting stored and flashed in the PCM (Powertrain Control Module).

The Engine Control Module (ECM) makes use of multiple sensors to ensure that fuel pressure remains constant within the fuel system. If one of the sensors detects a drop-in fuel pressure, the PCM will set code P02AD.

To properly meter fuel injection, the Engine Control Module (ECM) closely monitors and modulates the high-pressure system, even between injector pulses. If the ECM detects an unexpected drop in pressure in the high-pressure side of the fuel system, mainly due to leaky fuel injectors, it will set a diagnostic trouble code (DTC) P02AD and illuminate the Check Engine Light (CEL).

What causes the problem of Cylinder 5 Injector Leaking?

• Fuel injector leakage
• Fuel line common rail leakage
• Fuel pressure sensor malfunction/faulty
• Fuel pump or lift pump failure/damage
• Fuel heater constantly on
• Failed fuel temperature sensor
• Leakage in the high-pressure circuit
• Electrical connector corrosion/damages
• Fuel pressure regulator malfunction/faulty
• Plugged fuel filter dropping the fuel line volume
• Injector pump leakage
• Fuel control actuator failure/faulty
• Cascade overflow valve malfunction/failure
• Electrical harness damaged at the injectors or to the ECM
• Fuel pressure valve limiting
• ECM failure/faulty

1. Fuel Pump - Check for failure/damaged fuel pump for the reason of drop in the fuel pressure. Replace faulty pumps immediately.
2. Fuel Pressure Sensor - Faulty sensors can cause error in estimating the fuel pressure as the data sent to the ECU can be faulty, leading to performance issues. Replace them now!
3. Fuel Injection - If the fuel injection is faulty, it will lead to malfunctioned fuel delivery system due to loss of fuel pressure entering the engine. Replace faulty systems now!
4. Electronic Control Unit - Faulty ECU can lead to problems with the fuel delivery system. Replace it now!
5. Diagnostic Tools - An experienced mechanic will make use of factory grade tools to diagnose an OBD problem. Buy best tools and equipment from us.
6. Powertrain Control Module - P02AD error code also relates to problems with the powertrain which is a combination of engine control module and the transmission control module. Find all the Powertrain related parts with us.
7. Oxygen Sensor - The fault in the oxygen sensor immediately make the ECM to go into failsafe mode due to failure of the fuel delivery system, and engine control module. Replace faulty O2 sensors today!
8. Manifold Absolute Pressure Sensor - If you are experiencing any problem with the pressure sensor, you should replace them immediately. Shop from us now!

Some of the dramatic symptoms for this code may include smoke from the engine area, reduced acceleration, the engine may be disabled, and the strong odour of fuel may be present as well.

Common Symptoms

• Increased fuel consumption
• Extremely poor fuel economy
• Burning smell for under the hood
• Decreased Fuel pressure (could cause the engine to run poorly, further decreasing fuel economy)

Check for all the parts of the fuel system can cause this code. Some of the parts that could be replaced to repair this issue would include:

• Fuel tank
• Fuel lines
• Fuel hoses
• Fuel injectors
• Fuel rail
• Fuel pressure regulator
• Spark plug

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• Take the help of an experienced mechanic who will visually inspecting the fuel system, searching primarily for the leak. Since the leak is considered a significant one, it should be fairly easy to locate.
• The mechanic will repair or replace the part that is causing the large fuel leak, once the source of fuel leak has been found.
• Check for any wiring and harness issues and correct the damaged wirings.
• If there is no leakage found, check for the faulty ECU. Although, this fault is very rare but can be a reason for problematic fuel delivery system, thus hampering the engine performance. The ECU needs to be replaced in such condition and has to be reprogrammed to erase any stored faulty error.

Common Mistakes When Diagnosing The P02AD Code

• Considering that the issue at hand is a fuel leak, it would be quite difficult to make a mistake during diagnosis. This issue is as simple as locating the fuel leak and having it repaired.
• Check for the error code indicative in the PCM to avoid any rushed entrance in the system and analyse the problem properly.
• Always use the components as per the specific make and model and manufacturer’s specifications to avoid any future leakages.