P0081
Intake valve Control Solenoid Circuit (Bank 2)P0081 is a generic OBD-II powertrain diagnostic trouble code: Intake valve Control Solenoid Circuit (Bank 2). It is logged by the engine control unit when the powertrain monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.
What P0081 means
P0081 is a generic OBD-II code indicating a malfunction in the intake valve control solenoid circuit on Bank 2 — the engine bank that does not contain cylinder number one. The intake valve control solenoid is a key actuator in the variable valve timing (VVT) system. When commanded by the PCM, it meters pressurised engine oil to the intake camshaft phaser, which advances or retards intake valve opening and closing timing to optimise combustion efficiency, idle quality, power output, and emissions. Unlike the high (P0083) or low (P0082) circuit variant codes which indicate a specific voltage level fault, P0081 is a general circuit malfunction — the PCM has detected that the solenoid is not responding as commanded, or that circuit voltage or current is outside acceptable parameters without being decisively high or low. Common triggers include an open solenoid winding, a connector fault, or a wiring problem. When this code is active, the PCM locks intake valve timing on Bank 2 at a default position and may impose a failsafe that limits engine speed or output, producing noticeable performance symptoms particularly at higher engine loads where variable timing contribution is greatest.
Common causes
Most-frequently reported root causes when P0081 is logged.
-
1
Faulty intake valve control solenoid on Bank 2 with open or shorted winding
-
2
Damaged, corroded, or backed-out pins in the solenoid electrical connector
-
3
Open circuit or high-resistance fault in the wiring harness between the PCM and solenoid
-
4
Blown fuse in the VVT solenoid circuit
-
5
Low engine oil level or oil pressure insufficient to actuate the camshaft phaser
-
6
Oil sludge blocking the solenoid oil control valve ports
-
7
PCM output driver failure on the Bank 2 intake solenoid control channel
Symptoms drivers notice
How to diagnose P0081
A typical diagnostic flow when this code is present.
-
1
Scan for all active and pending codes; companion codes such as P0011/P0012 (Bank 1) or P0021/P0022 (Bank 2 phaser performance) help distinguish electrical from mechanical VVT faults
-
2
Check engine oil level and condition first; correct any deficiency before proceeding with electrical diagnosis
-
3
Locate the Bank 2 intake valve control solenoid and inspect its connector for corrosion, bent pins, moisture, or signs of heat damage
-
4
With the connector disconnected, measure solenoid winding resistance using a multimeter; compare to specification (typically 6–20 ohms) — infinite resistance indicates an open winding
-
5
Measure supply voltage and ground continuity at the connector with the ignition on; an absent reference voltage or missing ground confirms a wiring or fuse fault
-
6
Use a scan tool with active test capability to command the solenoid and listen for an audible click, confirming mechanical operation
-
7
Replace the solenoid if it fails electrical tests, clear codes, and verify VVT performance with a live data scan after a road test
Related powertrain codes
Frequently asked questions
What is the difference between P0081 and P0082 or P0083?
P0081 is a general circuit malfunction for Bank 2 intake valve control solenoid, meaning the PCM has detected an abnormal circuit condition without specifically identifying high or low voltage. P0082 means the circuit voltage is specifically too low (possible short to ground or open load), while P0083 indicates voltage too high (possible short to power). P0081 often accompanies P0082 or P0083 as the generic counterpart.
Can I still drive with P0081 active?
The vehicle will generally remain driveable, but Bank 2 VVT will be disabled, causing noticeably reduced performance and fuel economy. If the PCM has entered a failsafe mode with RPM or torque limits, driving is possible but uncomfortable. The underlying cause — particularly if oil-related — should be addressed before driving long distances.
Is this code exclusive to V-engines with two banks?
Yes. P0081 references Bank 2, which only exists on multi-bank engines (V6, V8, flat-six, etc.). Inline four-cylinder engines only have Bank 1. If P0081 appears on an inline engine, it typically indicates a PCM software or configuration error.
How much does it cost to fix P0081?
If the repair is a connector clean or wiring repair, costs are typically $50–$150. Replacing the intake valve control solenoid costs $40–$150 for the part and 0.5–1.5 hours labour, totalling approximately $150–$400. If the phaser itself is also damaged due to prolonged operation with low oil pressure, costs can escalate to $500–$1,200 or more.
Disabling P0081 in software
RaceTune can permanently disable P0081 — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.
Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.
Got P0081 in your scan?
Upload your ECU file — we'll identify the exact software version and confirm whether a disable is available for your car.
Upload your file