P2400 - OBD Trouble Code
OBD Code P2400 - Evap Leak Detection Pump Control Circuit/Open
Is the check engine light illuminated on the dashboard? Do you
smell some fuel odour while driving? These might me indication of Emission
control system failure causing P2400 error getting stored in the PCM
(Powertrain Control Module).
Learn More About OBD Error Code P2400
The
evaporative control EVAP system in a vehicle captures any raw fuel that
evaporates from the fuel storage system (this would be the fuel tank, fuel cap
and the filler neck). This system reacts to three specific variables – the
speed of the vehicle, its engine temperature and the engine load. After
assessing a reading on these three, the EVAP system proceeds with storing and
purging the fuel vapours it has captured, putting them back into the vehicle’s
combustion process.
The EVAP system is prone to changes in pressure. It is constantly relaying this information to the PCM. If the PCM senses that any particular reading for the heater pump has taken place which is outside the manufacturer's specifications for an acceptable range, the P2400 code is stored. The code P2400 is set when the PCM detects any problem with the leak detection pump control circuit.
What causes this problem with the EVAP Leak Detection Pump Control Circuit/Open?
- Leak Detection Pump failure
- Open or short harness to Leak Detection Pump
- Electrical connection issue to the Leak Detection Pump circuit
Replace/Repair These Parts To Fix OBD Code P2400
- Powertrain Control
Module - PCM stands for powertrain control module. It is a car part, a control
unit which is utilized on motor vehicles. It is generally a combined control
unit, consisting of the engine control unit (ECU) and the transmission control
unit (TCU).
- Electronic Control
Unit - If your automobile's
check engine light remains on constantly, and never goes off, there's a good
chance that your vehicle has a damaged electronic control unit. There are a lot
of reasons why a car's check engine light will remain on. The most common
reason is a defective ECU.
- Diagnostic Tools - It is always advisable to use correct tools
and equipment while resolving any OBD code issue as even small mistakes can
lead to wrong diagnosis. Thus, always take help from a professional who has the
knowledge and experience to such tools in efficient manner. Buy new quality
diagnostic tools from us today!
- Engine Control
Module - There can be some engine performance issues due to faulty engine
control module. If the ECM fails or has any problems it can lead to performance
issues with the vehicle like misfires, hesitation, loss of power, and sometimes
even decreased fuel economy.
- EVAP Leak Detection Pump - The leak detection pump is the component that often triggers those "Check Engine" warning lights when it detects small leaks that would be hard to see. It is required under federal law as it ensures your evaporative emission system (EVAP) is functioning correctly.
- Vapor Canister Valve - When the engine is running under certain conditions, the fuel vapors are purged from the canister and burned inside the engine. The purge valve precisely controls the amount of fuel vapor that is purged from the charcoal canister.
-
Vapor Canister
Purge Solenoid - The duty cycle EVAP
canister purge solenoid (DCP) regulates the rate of vapor flow from the EVAP
canister to the intake manifold. The Powertrain Control Module (PCM) operates
the solenoid.
Symptoms Of OBD Error Code P2400
It is
essential to know the symptoms of an issue as only then you would be able to
solve the problem. So that’s why we have listed out some major symptoms of OBD
Code P2400 here:
Common Symptoms
- Check Engine Light On
- Rich or lean engine conditions
- Leaking fuel odour
- Affected fuel economy
How To Correct P2400 Evap Leak Detection Pump Control Circuit/Open
Here are
some ways with the help of which you will be able to correct the OBD Code P2400.
- Faulty wiring repair or replacement
- EVAP Leak Detection Pump repair or replacement
- Fuel cap replacement
- Faulty EVAP valves replacement
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Easy Diagnosis Of Engine Error OBD Code P2400
Here are some steps which you should follow in order to diagnose this fault code P2400:
- Check the reading from the PCM by using an OBD-II scanner. Any
other problem codes will need to be downloaded as well.
- Inspect the fuel tank as well as its sending unit for any faults
and leakages and resolve the issue.
- The leak detection pump and the EVAP’s system’s wiring must also
be examined and immediately replaced to resolve the issue.
- If none of these issues shed any light on the problem, the carbon
canister needs to be checked, as well as its vent valve and replaced as
required.
- Also check the PCM for any faults as it may have malfunctioned and may need reprogramming and replacement. Then again check if the code returns after every step of diagnosis.
Common Mistakes When Diagnosing the P2400 Code
Most of the times, the
problem is as simple as a faulty fuel cap. This is an easy and affordable fix,
so much so that the mechanic sometimes skips this check. The same goes for the
purge and vent valves of the EVAP system. Again, these can be extremely easy
fixes that clear the code and don’t cost much, so they definitely need to be
addressed. Thus, it is important to follow the correct diagnosis in order to
avoid costly and wrong repairs.