P0081🔧 Variable valve timing (intake camshaft oil control solenoid)Stop and fix promptly

P0081: Intake Valve Control Solenoid Circuit Bank 2 (Meaning, Causes, Fixes)

Reviewed 2026-10-24 · Based on 2 cited source(s)

What P0081 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 P0081 and turns on the check engine light. Bank 2 is the side of the engine that does not have cylinder number 1 (verify for your engine), so P0081 only applies to V-type and other engines with two cylinder banks. 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. RepairPal describes a solenoid that uses oil pressure to let the PCM adjust valve timing, with P0081 set when the PCM finds an issue with the solenoid's signal. The sources differ in a few ways. OBD-Codes.com describes an electrical fault, such as a bad connection or a short, while RepairPal lists engine oil problems among the common causes and an oil and filter change as the common repair. RepairPal's description and cause list also say 'exhaust valve' even though the code and its title are about the intake solenoid, and its title leaves out the bank. RepairPal's severity (Urgent) and its 'engine may not start' symptom are stronger than anything OBD-Codes.com lists. OBD-Codes.com says this code is the bank 2 match for P0075, is similar to P0082 and P0083, and may be accompanied by P0028.

Severity: can I keep driving?

Stop and fix promptly

Get it checked soon and avoid hard driving until then. RepairPal rates P0081 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. Wiring harness with a poor connection or corroded terminals (OBD-Codes.com), or another wiring issue (RepairPal)
  2. Short to power or short to ground in the solenoid wiring (OBD-Codes.com)
  3. Faulty intake valve control solenoid (OBD-Codes.com; RepairPal calls it the exhaust valve control solenoid)
  4. Engine oil level too low (RepairPal only)
  5. Engine oil that doesn't meet the manufacturer's requirements (RepairPal only)
  6. 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 2 intake valve control solenoid, usually on the intake side of the cylinder head on the bank without cylinder 1, and look for unplugged connectors, corrosion or loose wires.
  3. OBD-Codes.com notes the solenoid can be switched on its power side or its ground side depending on the vehicle, so check a factory wiring diagram to see how your circuit works before testing.
  4. With the solenoid and computer unplugged, OBD-Codes.com says to measure resistance from one end of each solenoid wire to the other with a multimeter. It should be around 1 ohm or less; more than that points to corrosion, a bad terminal or an open wire.
  5. To check the solenoid itself, measure resistance across its terminals and compare with the factory spec or a known good part, then check from each terminal to ground. OBD-Codes.com says excessive resistance across the terminals, or low resistance to ground, means the solenoid is likely faulty.
  6. With the computer unplugged, OBD-Codes.com describes voltage checks on the solenoid wires to find a short to power (meter negative on ground) or a short to ground (meter positive on battery positive), then unplugging connectors to trace the short back toward the solenoid.
  7. 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 wiring repair or new solenoid
  • Other camshaft timing codes such as P0028, P0021 or P0020 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 P0081?

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.

What is the difference between P0075 and P0081?

Both point to the intake valve timing control solenoid circuit. P0075 is bank 1, the side with cylinder number 1, and P0081 is bank 2, the other side, so P0081 only shows up on engines with two cylinder banks such as a V6 or V8.

Can low oil cause P0081?

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 P0081 as an electrical fault, so check both the oil and the wiring.

How much does it cost to fix P0081?

Neither source gives a repair cost for P0081. 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: P0081 Intake Valve Control Solenoid Circuit (Bank 2)
  2. RepairPal: P0081 Intake Valve Control Solenoid Circuit (rated Urgent)

Last reviewed 2026-10-24. Code definitions and repair steps can vary by manufacturer. Confirm with your vehicle's service information.