What is P2402 : Engine Error code Causes Explained
The P2402 engine error code indicates aproblem with the secondary air injection system’s switching valve circuit. This issue can impact your vehicle’s emissions and performance, requiring timely attention to keep the engine running smoothly and efficiently
How to Identify a DTCs Number
Understand, this trouble codes (DTCs) are 5 characters: 1 letter, 4 numbers. P-Powertrain indicates the fault code’s location. Generic or manufacturer-specific codes are indicated by the first digit. The second digit denotes the subsystem (7=transmission). The last two numbers describe the issue.
You can identify a DTC number by using an OBD-II scanner, which connects to the vehicle’s diagnostic port. Once connected, the scanner reads stored trouble codes like P2402, allowing you to know which system or component is malfunctioning.
Causes of P2402 Error Code:
- Faulty Leak Detection Pump (LDP):
The LDP pressurizes the EVAP system to detect leaks. A fault can trigger code P2402. - Faulty EVAP Leak Detection Pump Circuit Wiring:
LDP circuit wiring/connector issues can cause high voltage, triggering the code. - Clogged or Damaged Vapor Canister.
A faulty canister restricts airflow, overloading LDP and causing high voltage. - Vacuum Leaks:
Vacuum leaks in the EVAP system can cause malfunctions and trigger code P2402. - Faulty Purge Control Solenoid:
A faulty purae control solenoid can disrupt vapor flow and contribute to the issue. - Blown fuse to the pump power relay:
A blown fuse can disable the pump, causing a high voltage reading. - Shorted wire harness:
A shorted wire harness can cause an incorrect voltage reading.
Risk Level of P2402 Error Code:
This code carries a medium risk level because while the engine might continue running normally, the failure can lead to increased emissions and potential damage to emissions control components if left unaddressed.
If this code appears, it’s advisable to diagnose and repair the issue soon to prevent further complications.
Common Car Brands Affected by P2402 Code:
The P2402 code can affect various vehicles, it is most commonly associated with:
- Ford
- Toyota
- Audi
- BMW
- Honda
- Volkswagen
- Mercedes
Video: P2402 Engine Error code
FAQ’s
What is the P2402 engine error code?
P2402 indicates a Diesel Particulate Filter (DPF) Restriction – Ash Accumulation, meaning the DPF is clogged with ash and not functioning properly.
What is the risk level of the P2402 code?
The risk level is medium, as a clogged DPF can lead to reduced engine power and increased emissions if not addressed.
Which vehicles are commonly affected by P2402?
Diesel vehicles with DPF systems, including models from Ford, Chevrolet, Honda, and Volkswagen, commonly experience this code