P0075🔧 Variable valve timing (intake camshaft oil control solenoid)Stop and fix promptly

P0075: Intake Valve Control Solenoid Circuit Bank 1 (Meaning, Causes, Fixes)

Reviewed 2026-10-23 · Based on 2 cited source(s)

What P0075 means

On engines with variable valve timing, the engine computer (ECM/PCM) moves the camshaft by sending engine oil through a control solenoid. OBD-Codes.com explains that the computer drives this solenoid with a pulse width modulated (PWM) signal and watches that signal; if the voltage is out of specification or intermittent, it sets P0075 and turns on the check engine light. Bank 1 is the side of the engine with cylinder number 1, and OBD-Codes.com says the intake valve control solenoid is usually on the intake manifold side of the cylinder head. It is a generic code that applies to all makes from 1996 on, though repair steps vary by model. The sources differ in a few ways. OBD-Codes.com describes a purely electrical circuit fault, while RepairPal says the code sets when the PCM finds an issue with the solenoid's signal but lists engine oil problems among the common causes. RepairPal's write-up also says this intake solenoid controls the exhaust valve and lists an exhaust valve control solenoid failure as a cause, which conflicts with the code's own name and with OBD-Codes.com; on a P0075 it is the bank 1 intake solenoid that should be checked. RepairPal's severity (Urgent) and its 'engine may not start' symptom are also stronger than anything OBD-Codes.com lists. OBD-Codes.com says this code is similar to P0076 and P0077, which cover the same bank 1 solenoid circuit, and may be accompanied by P0026.

Severity: can I keep driving?

Stop and fix promptly

Get it checked soon and avoid hard driving until then. RepairPal rates P0075 Urgent, meaning immediate action is needed, and lists decreased engine performance, higher fuel use and, in some cases, an engine that may not start. OBD-Codes.com gives no severity rating and lists milder symptoms: the check engine light, poor acceleration and lower fuel economy. Check your engine oil level right away, since RepairPal lists low or wrong-spec oil among the causes.

Common symptoms

Likely causes

Roughly most to least common, based on the sources below. Your vehicle may differ.

  1. Poor connection or corroded terminals in the wiring harness, or other wiring issues (OBD-Codes.com, RepairPal)
  2. Faulty intake valve control solenoid (OBD-Codes.com; RepairPal names it the exhaust valve control solenoid)
  3. Short to power in the solenoid circuit (OBD-Codes.com)
  4. Short to ground in the solenoid circuit or inside the solenoid (OBD-Codes.com)
  5. Engine oil level too low (RepairPal only)
  6. Engine oil that doesn't meet the manufacturer's requirements (RepairPal only)
  7. Faulty engine computer (ECM/PCM) (OBD-Codes.com, RepairPal)

Diagnostic steps you can do

⚠ Before you start

Work on a cool engine, parked on level ground with the parking brake set. Never work under a car supported only by a jack.

  1. Check the engine oil level and make sure the oil matches your owner's manual spec; RepairPal lists low or wrong oil as common causes and an oil and filter change as the common repair.
  2. Find the bank 1 intake valve control solenoid, usually on the intake side of the cylinder head on the cylinder 1 side, and check for unplugged connectors, corrosion or loose wires (OBD-Codes.com).
  3. With the connectors unplugged at the solenoid and computer, use a multimeter on ohms to check each wire end to end. OBD-Codes.com says resistance should be around 1 ohm or less; higher points to corrosion or bad wiring.
  4. Measure the resistance across the solenoid's own terminals and compare it with factory specs or a known good solenoid. OBD-Codes.com says an open or excessive reading means the solenoid is likely bad, and any reading from a terminal to ground suggests it is shorted internally.
  5. With the computer connector unplugged, OBD-Codes.com describes checking the solenoid wires for unwanted voltage (short to power) and for a path to ground (short to ground), then tracing any fault connector by connector.
  6. If wiring and solenoid test good, OBD-Codes.com suggests comparing the duty cycle commanded on an advanced scan tool with the actual signal at the solenoid using an oscilloscope or graphing multimeter at different engine speeds and loads. No signal from the computer may mean a computer fault.

Typical fixes

Repair costs vary widely by vehicle, region, parts brand and shop, so we don't quote prices. Get a written estimate after diagnosis.

🛠 When to call a pro

  • The engine won't start or runs poorly along with the code
  • You don't have a wiring diagram, multimeter or a scan tool that shows solenoid duty cycle
  • The code returns after an oil change and a new solenoid
  • Other camshaft timing codes such as P0010, P0011 or P0026 are also set
  • Tests point to the engine computer, which may need programming to your vehicle

Where to buy

Plain search links. Always match parts to your exact year, make, model and engine.

OBD2 scanners on Amazon Parts at Advance Auto Parts catalog at RockAuto

FAQs

Can I drive with P0075?

Only carefully and for a short time. RepairPal rates it Urgent and says the engine may lose performance or even fail to start, while OBD-Codes.com lists poor acceleration and lower fuel economy. Check the oil level first and get it diagnosed soon.

Can low oil cause P0075?

RepairPal lists low engine oil and oil that doesn't meet the manufacturer's requirements as common causes, because the timing solenoid works with engine oil pressure. OBD-Codes.com treats P0075 as an electrical circuit fault, so check both the oil and the wiring.

Is P0075 related to P0076 and P0077?

Yes. OBD-Codes.com says P0075 is similar to P0076 and P0077, which involve the same bank 1 intake valve control solenoid circuit, and that it may be accompanied by P0026. The checks on this page (oil, wiring, solenoid resistance) are a good starting point for any of them.

How much does it cost to fix P0075?

Neither source gives a repair cost for P0075. It can be as simple as an oil change or a corroded connector, or it may need a new solenoid, so diagnose it before buying parts.

Sources

  1. OBD-Codes.com: P0075 Intake Valve Control Solenoid Circuit (Bank 1)
  2. RepairPal: P0075 Intake Valve Control Solenoid Circuit (rated Urgent)

Last reviewed 2026-10-23. Code definitions and repair steps can vary by manufacturer. Confirm with your vehicle's service information.