P1470 - FAULT CODE - OBD2

P1470 BMW, MINI: LEAKAGE DIAGNOSTIC PUMP ELECTRICAL CONTROL CIRCUIT

The Evaporative Emissions Control System (EVAP) is responsible for reducing the number of exhaust vapors that are expelled into the atmosphere, significantly reducing the levels of pollution in the atmosphere. The EVAP is continuously monitored to ensure that it is functioning properly, paying close attention to any blockages or leaks that may occur.

The function of detecting leaks in the EVAP system is of vital importance since even the slightest leak can lead to the release of vapors that are very harmful to the environment. For this reason, the Leakage Diagnostic Pump (LDP) is used, a component that, by means of engine vacuum, is able to detect EVAP leaks.

This pump has a diaphragm, which changes continuously according to increases in vacuum pressure. Once adequate levels are reached, the pump is deactivated, which in turn prevents excessive vacuum build-up. The PCM (Powertrain Control Module) monitors this process and uses this information to determine if the EVAP has a problem.

P1470 OBDII fault code is a code that in the case of BMW and Mini vehicles, relates to the LDP (Leak Detection Pump). The code indicates that the electrical control circuit for the LDP is malfunctioning.

• The Check Engine light comes on.
• Strong fuel odors are perceived.

P1470 OBD2 diagnostic code is set for one of the following reasons:

• Leakage Detection Pump wires or connectors could have been damaged.
• The Leakage Diagnostic Pump electrical circuit could be open or shorted.
• The LDP may be in poor condition.

To troubleshoot the DTC P1470 OBDII code you must do the following:

• Consult the Technical Service Bulletins.
• Inspect all cables and connectors that are related to the Leakage Diagnostic Pump circuit, in order to verify that they are in good condition. If obvious damage is found, proceed with repairs.
• Verify that the Leakage Diagnostic Pump circuit is not open or shorted. To do this, follow the manufacturer's recommendations to check if the actual circuit voltages match those specified. If deficiencies are found, make the appropriate corrections.
• Following the diagnostic steps outlined by the manufacturer in the information source, determines that the LDP has no deficiencies. Correct it as required.