OBD-II Code
C0700
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)
$400–$3,500
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
C0700 on Toyota/Lexus platforms equipped with active or adaptive suspension is a 'left rear channel defective' code — the suspension ECU has detected that the left rear damper actuator, accumulator pressure, or ride-height position sensor is not responding to commanded inputs.
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 procedureC0700 on Toyota/Lexus platforms equipped with active or adaptive suspension is a 'left rear channel defective' code — the suspension ECU has detected…
C0700 on Toyota/Lexus platforms equipped with active or adaptive suspension is a 'left rear channel defective' code — the suspension ECU has detected that the left rear damper actuator, accumulator pressure, or ride-height position sensor is not responding to commanded inputs. On Toyota Tundra/Sequoia with AVS (Adaptive Variable Suspension), the channel fault usually points at a failed solenoid in the LR damper that adjusts shock valving; on Lexus LX with the full hydraulic active suspension (AHC), the fault typically points at a hydraulic-circuit issue on the LR corner — a failed height-control valve, pressure-accumulator pre-charge loss, or a leaking LR damper cylinder.
Cheapest-first ladder
- Visual inspect the LR corner for fluid leaks at the damper body and the high-pressure hydraulic lines — AHC fluid leaks are obvious (golden hydraulic fluid pooling under the LR strut tower or wetting the lower control arm), and a leaking damper is a $400-$800 part.
- Scan-tool live-data the LR ride-height sensor — expect 0-5V scaled across the suspension travel range; flat-lined or pegged readings indicate a failed height sensor or broken linkage rod between the sensor and the LCA.
- Pressure-test the AHC accumulator spheres if equipped — accumulator pre-charge degrades over 10+ years and produces channel-defective codes when the system can't maintain commanded pressure; this is a serviceable item on LX 470/570 platforms.
- Resistance-check the damper solenoid on AVS-equipped Tundra/Sequoia (typical spec 3-12 ohms across the coil; open or shorted is a dead solenoid). Expensive-misdiagnosis caveat: on Lexus LX 470/570 with AHC, C0700 is frequently misdiagnosed as a failed shock when the actual issue is system-wide accumulator pressure loss across all four corners and the LR is just the first to flag — a full AHC pressure check across all four spheres is the correct first step, because replacing one shock on a system with degraded accumulators doesn't fix the underlying problem.
Vehicle-specific patterns2008-2021 Toyota Tundra/Sequoia with AVS (Adaptive Variable Suspension) throws C0700 from failed LR damper solenoids that fail open or shorted; OEM d…
- 2008-2021Toyota Tundra/Sequoia with AVS (Adaptive Variable Suspension) throws C0700 from failed LR damper solenoids that fail open or shorted; OEM dampers run $400-$700 per corner and aftermarket Bilstein/KYB conversion kits exist that delete the AVS system entirely if Brian's customer doesn't want the OEM cost.
- 1998-2021Lexus LX 470/LX 570 with AHC (Adaptive Hydraulic Suspension) throws C0700 from leaking LR damper cylinders (typically the rear cylinders fail before the fronts on these), failed height-control valves at the rear axle, or accumulator pre-charge loss — a Techstream pressure-cross-check is required to isolate.
- 2007-2017Lexus LS 460/600h with AVS-equipped trim packages throws C0700 from the same solenoid-failure pattern as Tundra.
- 2010-2015Lexus GX 460 with KDSS (Kinetic Dynamic Suspension System) can throw similar channel codes from failed KDSS solenoid valves at the front/rear sway bar pressure circuits.
Estimated repair$400 to $3,500.
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