OBD-II Code
P0662
Severity
Not yet reviewed
Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.
Can you drive it
We cannot say
Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.
Indicative cost (USD)
$80–$750
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
$80 (connector repair) to $750 (full intake manifold + actuator on a GM 3.6).
P0662 sets when the PCM commands the IMRC actuator on bank 1 and the driver circuit reads a voltage HIGHER than expected — typically the driver pulled the line to ground and the line stayed at 12V, indicating an open in the actuator coil, an open in the wiring, or a high-side driver fault inside the PCM.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then follow the diagnostic notes further down this page, in the order they are written.
They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Read the full diagnostic procedureP0662 sets when the PCM commands the IMRC actuator on bank 1 and the driver circuit reads a voltage HIGHER than expected — typically the driver pulle…
P0662 sets when the PCM commands the IMRC actuator on bank 1 and the driver circuit reads a voltage HIGHER than expected — typically the driver pulled the line to ground and the line stayed at 12V, indicating an open in the actuator coil, an open in the wiring, or a high-side driver fault inside the PCM. This is the complement of P0661 and uses the same physical hardware; the diagnostic flow shares most of its steps.
Cheapest-first ladder
- Visual the IMRC connector for backed-out pins or corrosion — diesel and high-mileage gas engines both kill these connectors.
- Resistance-check the IMRC actuator coil (8-16 ohms cold) — an open coil reads OL on a DMM and is the most common P0662 cause; replace the actuator.
- Wiggle-test the harness from the actuator back to the PCM with the actuator commanded — intermittent opens at chafe points show up as the code re-setting on motion.
- If wiring and actuator both check good, the PCM's high-side driver may have failed (rare, but it happens). Target thresholds: actuator coil 8-16 ohms, command line drops to <1V when commanded on, returns to 12V when off, actuator current 0.3-1.5A during sweep. Expensive-misdiagnosis caveat: an open IMRC coil and a broken linkage both throw the same family of codes on some platforms (the PCM can't always distinguish them), and replacing the actuator without checking the linkage means the new actuator stalls against the same jammed butterflies — always free the linkage and confirm full sweep before installing a new actuator.
Vehicle-specific patterns2003-2007 Ford 3.0L Duratec (Escape, Tribute, Mariner, Taurus) throws P0662 alongside P0661 when the IMRC actuator coil opens — Ford redesigned the a…
- 2003-2007Ford 3.0L Duratec (Escape, Tribute, Mariner, Taurus) throws P0662 alongside P0661 when the IMRC actuator coil opens — Ford redesigned the actuator midway through the production run, get the updated part number.
- 2004-2013Mazda MZR 2.3L/2.5L (3, 5, 6, CX-7) throws P0662 from the actuator solenoid failing internally; the failure rate climbs sharply past 90k miles.
- 2010-2017GM 3.6L LFX/LLT throws P0662 from corroded actuator pins on the front-of-manifold connector or from a failed PCM high-side driver after a poorly grounded jump-start.
- 2011-2018Hyundai Theta II 2.4L throws P0662 when carbon buildup increases the mechanical resistance on the IMRC butterflies and the actuator burns out trying to drive against it — fix the carbon, then the actuator.
- 2007-2014Subaru Forester/Legacy with the FB25 throws P0662 from the tumble-generator valve (Subaru's IMRC equivalent) failing.
Estimated repair$80 (connector repair) to $750 (full intake manifold + actuator on a GM 3.6).
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