What Does P1495 Mean?
The PCM has detected a malfunction in the secondary air relief solenoid valve circuit. This is similar to P1490 and indicates a problem with the electrical circuit controlling the air injection relief valve.
Common Causes
40%
Defective secondary air relief solenoid valve
25%
Short to ground or power in solenoid wiring
20%
Corroded or damaged electrical connector
10%
Intermittent open circuit in solenoid control wiring
5%
Failed PCM output driver for solenoid
Diagnostic Steps
1
Step 1: Locate secondary air relief solenoid and check connector for moisture or corrosion
2
Step 2: Measure solenoid resistance with connector disconnected (should be 20-50 ohms typically)
3
Step 3: Check for short to ground by measuring resistance between each solenoid terminal and chassis ground
4
Step 4: Monitor scan tool data for PCM solenoid command status during engine warm-up
5
Step 5: Backprobe connector and verify PCM is sending proper switching signal (12V on/0V off)
Estimated Repair Cost
$150 - $475
Parts + labor, varies by vehicle and location
The PCM has detected a malfunction in the secondary air relief solenoid valve circuit. This is similar to P1490 and indicates a problem with the electrical circuit controlling the air injection relief valve.
The most common cause of P1495 (Secondary Air Relief Solenoid Circuit Malfunction) is: Defective secondary air relief solenoid valve
Typical repair costs for P1495 range from $150 to $475, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving. Only affects cold-start emissions reduction and may result in check engine light and emissions test failure.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1495 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control - Secondary Air Injection
Difficulty
Type
Manufacturer
Recommended Tools
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