What Does P1475 Mean?
The Leak Detection Pump (LDP) circuit has an open signal wire or malfunction. The LDP is used to pressurize the EVAP system to detect leaks, and this code indicates the PCM cannot communicate with or control the pump.
Common Causes
35%
Open or damaged wiring in the LDP signal circuit
30%
Failed Leak Detection Pump
20%
Corroded or disconnected LDP connector
15%
PCM internal failure or poor ground connection
Diagnostic Steps
1
Step 1: Visually inspect LDP connector and wiring for damage, corrosion, or disconnection
2
Step 2: Test LDP power and ground circuits with multimeter, verify 12V supply and good ground
3
Step 3: Check signal wire continuity between LDP and PCM using wiring diagram
4
Step 4: Perform LDP actuation test using scan tool to verify pump operation
5
Step 5: If all circuits test good, replace LDP and retest system
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
The Leak Detection Pump (LDP) circuit has an open signal wire or malfunction. The LDP is used to pressurize the EVAP system to detect leaks, and this code indicates the PCM cannot communicate with or control the pump.
The most common cause of P1475 (EVAP Emission Contr.LDP Circ Malfunction/Signal Circ.Open) is: Open or damaged wiring in the LDP signal circuit
Typical repair costs for P1475 range from $150 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No immediate safety concern. Vehicle is safe to drive but may fail emissions testing and experience slightly reduced fuel economy.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1475 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control (EVAP)
Difficulty
Type
Manufacturer
Recommended Tools
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