What Does P1453 Mean?
The PCM has detected an electrical fault in the control circuit for the secondary air injection pump relay. This could be an open circuit, short circuit, or excessive current draw preventing proper relay operation.
Common Causes
35%
Failed secondary air injection pump relay with internal contact failure
25%
Corroded or damaged relay socket connections in fuse box
20%
Shorted or open wiring between PCM and relay control circuit
15%
Secondary air pump motor shorted causing excessive current through relay
5%
PCM internal relay driver circuit failure
Diagnostic Steps
1
Step 1: Locate and inspect secondary air injection pump relay in fuse/relay box for damage or corrosion
2
Step 2: Swap relay with known good relay of same type to determine if relay is faulty
3
Step 3: Check relay socket terminals for corrosion, overheating, or poor contact
4
Step 4: Measure current draw of secondary air pump motor when relay is commanded on
5
Step 5: Test PCM control signal voltage at relay coil terminal during activation command
Estimated Repair Cost
$80 - $400
Parts + labor, varies by vehicle and location
The PCM has detected an electrical fault in the control circuit for the secondary air injection pump relay. This could be an open circuit, short circuit, or excessive current draw preventing proper relay operation.
The most common cause of P1453 (Secondary Air Injection Pump Relay Control Circuit Electrical) is: Failed secondary air injection pump relay with internal contact failure
Typical repair costs for P1453 range from $80 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but may cause cold start emission issues and check engine light. Vehicle may fail emissions testing.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1453 to identify the root cause.
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Quick Info
Category
Powertrain
System
Secondary Air Injection System
Difficulty
Type
Manufacturer
Recommended Tools
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