Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the car's system that checks for leaks in the fuel tank. It's like when you have a balloon with a tiny hole, and the pump that checks for leaks isn't working right.
The P1470 code indicates an issue with the electrical circuit that controls the leakage diagnostic pump, which is part of the evaporative emission control system.
The leakage diagnostic pump is a component of the vehicle's evaporative emission control system (EVAP) that pressurizes the fuel system to check for leaks. The P1470 code is triggered when the engine control module (ECM) detects a malfunction in the electrical circuit controlling this pump.
• Check Engine Light is on
• Failed emissions test
• Fuel smell from the vehicle
• Faulty leakage diagnostic pump
• Damaged or corroded wiring or connectors
• Faulty ECM or control module
ECM: Engine Control Module
EVAP: Evaporative Emission Control System
• Use an OBD-II scanner to confirm the code.
• Inspect wiring and connectors for damage or corrosion.
• Test the leakage diagnostic pump for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the leakage diagnostic pump if faulty.
• Replace or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Mercedes-Benz C-Class
• Mercedes-Benz E-Class
• Mercedes-Benz S-Class
• Regularly inspect and maintain the fuel system.
• Ensure connectors and wiring are protected from corrosion.
• Perform routine diagnostic checks.
Sensor Issue
• Have the vehicle inspected by a professional if the Check Engine Light is on.
• Avoid driving with a strong fuel smell, as it may indicate a leak.
Check with the vehicle manufacturer for warranty coverage on emission-related components.
The P1470 code has been associated with vehicles using advanced EVAP systems, particularly in European models.
Moderate – While not immediately dangerous, it should be addressed to ensure emissions compliance and prevent further issues.
Driving with an emissions system malfunction may be illegal in some regions and could lead to fines.
• Engine at normal operating temperature
• Vehicle parked on a level surface
The leakage diagnostic pump is typically located near the fuel tank or in the rear of the vehicle.
Q: Can I drive with a P1470 code?
A: Yes, but it's best to have it checked soon to avoid potential emissions issues.
Q: Will a P1470 code affect my car's performance?
A: It may not directly affect performance, but it can lead to emissions test failure and fuel smell.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant when EVAP diagnosis points toward purge-flow or purge-control faults.
EVAP diagnosis often includes purge-flow and valve-control faults.
Confirm the failed valve and exact fitment before buying parts.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.