P3462 OBD Error Code: Problem & Solutions

<<See All OBD Codes

Baffled? Well, don’t worry, we have listed here all that you need to know about the error code P3462. This generic OBD-II code decreased engine performance is also described as a cylinder 8 exhaust valve control circuit performance. It can be seen that a large number of manufacturers’ make use of the cylinder deactivation systems for meeting fuel and emissions standards. This system further permits the engine control module (PCM) to defuse select cylinders at times when extra power is not required from the engine (such as at idle or when cruising on the highway). The PCM sets the error code P3462 when if the engine control module records that the exhaust valve for cylinder number eight is not turning on or off the way it is being commanded.

It should be noted that the deactivation of the cylinder is only done by disabling the opening of the intake and exhaust valves to on the selected cylinders by making use of the special valve lifters. The internal pin housing of the lifter is connected to the outer housing through the spring-loaded locking pins present in the deactivation lifters. The pushrod is interfaced by the lifter plunger and pushrod seat present in the pin housing. The outer housing connects to the camshaft lobe via roller. The locking pins are pushed outward by spring force. Also, locking the pin housing and outer housing together cause the lifter operate as a normal lifter during the V8 mode. The locking pins are pushed inward with engine oil pressure directed from the valve lifter oil manifold (VLOM) assembly solenoids when the V4 mode is commanded ON. The internal pin housing remains stationary when the lifter pin housing is unlocked from the outer housing, while the outer housing moves with the profile of the camshaft lobe. This results in a closed. Both the intake and exhaust valves are controlled by one VLOM solenoid for deactivating each cylinder. One can find two prominent oil passages leading to each cylinder deactivation lifter bore, one for the hydraulic lash-adjusting feature of the lifter, and one for controlling the locking pins utilized for the task of cylinder deactivation.

What causes this problem with the Cylinder 8 Exhaust Valve Control Circuit Performance?

• Fault in the variable valve timing solenoid
• Less engine oil level or pressure
• Jammed oil passage
• Defective wiring
• Corroded or loose connectors
• Malfunction in the ECM

1. Powertrain Control Module - Due a malfunction in the powertrain control module, downward emissions are likely to follow besides other issues like a sluggish engine crank, failure in the emission system etc. We advise you to get your faulty PCM changed now by simply logging into Parts Avatar.
2. Engine Control Module - Facing the error code P3462? It could be due to a fault in your engine control module. Not only this, it is likely to invite problems while accelerating and engine misfires. We advise you to get your engine control module changed or repaired right away before it's too late.
3. Exhaust Valve - Weary or an unsound exhaust valve can often be problematic. It monitors the exhaust system as well as few components in the system. Also, a faulty one can lead to a lot of problems. So, to add some spark to your ride you definitely need the perfect quality exhaust valve offered at Parts Avatar. Isn’t that just the perfect deal?
4. Exhaust Valve Control Solenoid - It can be seen that all the time the exhaust valve control solenoid controls the overall functioning of the exhaust system so if damaged it should be fixed. So, replacing one can be one of the wisest decisions to avoid a problematic system.
5. Timing Chain - Finding metal shavings in the oil? Then, this is indicative of an open or shorted timing chain. Change or repair it now!

Willing to know some common symptoms of OBD code P3462? Your wish is our demand. Have a look at them below:

Common Symptoms

• More fuel consumption
• Falling engine performance
• Engine misfire may be observed
• The service engine soon light or the check engine light blinking

We have listed out so ways which would help you to correct the occurrence of OBD code P3462. They are mentioned here as follows:

• A defective variable valve timing solenoid should be repaired or replaced
• A thorough cleansing should be performed of the corrosion on the connectors
• All the corroded or faulty wiring should be repaired or replaced
• Ensure that all the blocked oil passages are cleared
• A malfunctioning ECM should be flashed or replaced

There is no need to get strained if your OBD code is still flashing up as we are here at your service. Have a look at our superior variety of PCM, ECM, exhaust valve, exhaust valve control solenoid, timing chain, camshaft actuator, valve lifter, timing component and many more. Now all your problems would vanish within no time.

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

Well, the first step in the troubleshooting process for any defect should be to search the technical service bulletins (TSB's) for the specific vehicle by year, model and engine. Most of the times, this helps in saving a lot of time and resources. Secondly, check the condition of the engine oil. Make sure that it is serviced as per the needs. Then proceed to find all the components linked to the cylinder 8 deactivation intake valve control circuit for any kind of physical damage. According to the specific vehicle, this circuit has numerous components installed including the deactivation solenoid, switches, fault indicators and the ECM. Next, a careful visual inspection should be performed to check the linked wiring for errors such as scraping, rubbing, bare wires, or corrosion spots. Now, the connectors and circuitry should be checked for security, burns and defects pins. This inspection should include all the wiring connectors and circuitry to all parts including the ECM. The specific tech data should be consulted for the vehicle in order to check the configuration of the cylinder 8 deactivation/intake valve control circuit. Then confirm that all the components installed within the circuit (including a fuse or a fuse-able link) are fine.

Advanced steps that should be performed

These advanced steps performed are quite vehicle specific and may need the right advanced equipment for accuracy. A digital multimeter and the specific technical references for the vehicle should be referred to while performing the procedure.

Voltage checks that should be performed

It can be observed that the reference voltage and the acceptable ranges vary according to the specific vehicle and the circuit configuration. Troubleshooting charts and the right sequence to follow will be a part of the specific technical data. If in case, while performing the diagnosis you detect absence of a power source or ground, this may require continuity testing for checking the probity of the wiring, connectors and other parts. Perform continuity tests with the power removed from the circuit. Also, the normal readings for wiring and connections should be 0 ohms of resistance. Note that the resistance or no continuity is a sign of damaged wiring that is open, short circuited or burnt. Repairs or replacements should be performed.

Common Mistakes When Diagnosing the P3462 Code

Here we have listed a few common mistakes that should be avoided:

• Make sure that the engine oil level is not too low
• Failed powertrain control module (PCM)
• Faulty variable valve timing solenoid
• Wiring issues