What Does P0075 Mean?
This code indicates a general electrical malfunction in the intake variable valve timing (VVT) oil control solenoid circuit on bank 1. The ECM has detected abnormal voltage, resistance, or current flow in the circuit controlling the intake camshaft phaser solenoid. This can cause rough idle, reduced power, and poor fuel economy due to incorrect intake valve timing.
Common Causes
35%
Failed intake VVT solenoid with internal coil short or open circuit, typically measuring outside the 6.5-8.5 ohm specification
25%
Damaged or corroded wiring harness between ECM and intake VVT solenoid, especially near exhaust heat sources
20%
Contaminated engine oil blocking the VVT solenoid screen filter, causing erratic solenoid operation and triggering circuit faults
15%
Corroded or damaged connector pins at the VVT solenoid or ECM causing intermittent contact
5%
Faulty ECM driver circuit unable to properly control solenoid duty cycle
Diagnostic Steps
1
Measure the intake VVT solenoid coil resistance with a multimeter at the solenoid connector (disconnect solenoid first). Specification is typically 6.5-8.5 ohms at 68°F (20°C). An open or shorted reading confirms a failed solenoid.
2
Inspect the VVT solenoid connector and wiring harness for corrosion, heat damage, chafing, or broken wires. Pay special attention to routing near exhaust components.
3
With the solenoid disconnected, check for battery voltage on the power supply wire with ignition on. Then backprobe the ECM connector to verify the control circuit has continuity and is not shorted to ground or power.
4
Remove the VVT solenoid and inspect the mesh screen filter for sludge or debris contamination. Check for metal particles that indicate internal engine wear.
5
Using a scan tool, command the VVT solenoid duty cycle from 0-100% while monitoring intake cam position. Verify the solenoid clicks and the cam angle responds proportionally.
Estimated Repair Cost
$80 - $400
Parts + labor, varies by vehicle and location
This code indicates a general electrical malfunction in the intake variable valve timing (VVT) oil control solenoid circuit on bank 1. The ECM has detected abnormal voltage, resistance, or current flow in the circuit controlling the intake camshaft phaser solenoid. This can cause rough idle, reduced...
The most common cause of P0075 (Intake Valve Control Solenoid Circuit (Bank 1)) is: Failed intake VVT solenoid with internal coil short or open circuit, typically measuring outside the 6.5-8.5 ohm specification
Typical repair costs for P0075 range from $80 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
While not an immediate safety hazard, VVT malfunction can cause reduced engine power and poor throttle response, which may affect the ability to merge or accelerate safely in traffic.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0075 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing (VVT) System
Difficulty
Type
Generic (SAE)
Recommended Tools
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