What Does P2564 Mean?
The PCM has detected a voltage signal from the turbocharger boost control position sensor that is below the expected minimum threshold. This indicates an electrical circuit fault or sensor failure causing an abnormally low reading.
Common Causes
35%
Short to ground in position sensor circuit wiring
30%
Failed boost control position sensor with internal short
20%
Damaged or corroded sensor connector causing poor ground connection
10%
Broken or chafed wiring harness near turbocharger due to heat/vibration
5%
Failed PCM internal circuit (rare)
Diagnostic Steps
1
Step 1: Disconnect position sensor connector and measure voltage at PCM side of harness (should show reference voltage typically 5V)
2
Step 2: Check sensor ground circuit for continuity to PCM and proper ground connection
3
Step 3: Measure sensor resistance and compare to specifications with sensor disconnected
4
Step 4: Inspect wiring harness for damage, pinching, or contact with hot exhaust components
5
Step 5: Verify PCM is providing proper reference voltage to sensor circuit
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The PCM has detected a voltage signal from the turbocharger boost control position sensor that is below the expected minimum threshold. This indicates an electrical circuit fault or sensor failure causing an abnormally low reading.
The most common cause of P2564 (Turbocharger Boost Control Position Sensor "A" Circuit Low) is: Short to ground in position sensor circuit wiring
Typical repair costs for P2564 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Reduced power output and potential limp mode activation. Vehicle remains drivable but with significantly diminished performance.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2564 to identify the root cause.
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Quick Info
Category
Powertrain
System
Forced Induction System
Difficulty
Type
Generic (SAE)
Recommended Tools
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