What Does P1527 Mean?
The PCM has detected an abnormally low voltage signal on the intake camshaft position actuator control circuit for Bank 1. This suggests a short to ground or excessive current draw preventing proper VVT operation.
Common Causes
35%
Wiring harness chafed or shorted to ground/engine block
30%
VVT solenoid internal short to ground
20%
Damaged connector causing short to ground
10%
Oil contamination in connector causing low resistance path
5%
PCM internal driver circuit malfunction
Diagnostic Steps
1
Step 1: Disconnect VVT solenoid connector; check for oil contamination and clean if necessary
2
Step 2: Measure resistance from solenoid control pin to ground with solenoid disconnected; should be open circuit
3
Step 3: Measure resistance of VVT solenoid itself; very low resistance indicates internal short
4
Step 4: Inspect wiring harness for contact with hot surfaces, sharp edges, or moving components
5
Step 5: Perform insulation resistance test on control wire from PCM to solenoid connector; repair or replace damaged sections
Estimated Repair Cost
$150 - $700
Parts + labor, varies by vehicle and location
The PCM has detected an abnormally low voltage signal on the intake camshaft position actuator control circuit for Bank 1. This suggests a short to ground or excessive current draw preventing proper VVT operation.
The most common cause of P1527 ("A" Camshaft Position Actuator Control Circuit Signal Low Bank 1) is: Wiring harness chafed or shorted to ground/engine block
Typical repair costs for P1527 range from $150 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to operate but engine performance will be degraded with fixed cam timing. May experience poor idle quality and increased emissions requiring prompt repair.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1527 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing System
Difficulty
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