Honda U0416-68: Invalid Data from VSA Control Module
| Light color | Amber |
|---|---|
| Urgency | Service soon (amber) |
| Safe to drive | Short distance only - VSA and ABS are offline |
| Common cause | Weak battery or battery disconnect corrupting CAN bus data |
| DIY or shop | Either - battery/wiring checks are DIY; software updates require Honda i-HDS at a shop |
Honda DTC U0416-68 means the powertrain control module received invalid data from the Vehicle Stability Assist (VSA) control module, which also governs ABS. The '-68' sub-type identifies this as an 'event information' flag: something caused the VSA module to stop sending valid signals, but the VSA module itself may not be the broken part.
Three things account for the large majority of cases - a dead or low battery, a CAN bus wiring fault, or a known Honda software bug triggered by battery disconnection. Before replacing the VSA modulator, work through the cheaper causes first.
What U0416-68 actually means
The base code U0416 is a standard OBD-II network communication fault: 'Invalid Data Received from Vehicle Dynamics Control Module.' Honda appends -68 as a manufacturer sub-type, which Honda labels 'Event Information.' That sub-type tells you the VSA module set this fault in response to an external event - typically bad power supply, a missing CAN bus signal, or a software hiccup - rather than an internal hardware failure inside the modulator itself.
The VSA system shares a CAN bus with the engine ECM, transmission control module, electronic power steering unit, and (on equipped vehicles) the forward collision warning radar. If any node on that bus goes quiet or sends garbage data, U0416-68 can appear even if the VSA hardware is fine.
- VSA Warning LightAmber
- Meaning: Vehicle Stability Assist system is disabled or has detected a fault. Traction and stability intervention will not function.Recommended action: Do not rely on VSA in low-grip conditions. Scan for DTCs and address the root cause before extended driving.
- ABS Warning LightAmber
- Meaning: Anti-lock braking is offline. Normal braking still works, but wheels may lock under hard stops.Recommended action: Drive cautiously and allow longer stopping distances. The fault must be diagnosed and cleared before ABS returns.
- Brake System Warning LightRed
- Meaning: In some Honda models, a confirmed VSA module fault also triggers the red brake light to alert the driver that full brake system functionality is compromised.Recommended action: If the red brake light is on alongside the VSA and ABS lights, pull over and verify brake pedal feel is normal before continuing.
Common causes in order of likelihood
1. Weak or recently disconnected battery. Honda TSB ATS161223 and A17-064 both document a known software bug: disconnecting, replacing, or jump-starting the battery on affected Civic, CR-V, Accord, and Odyssey models sets U0416-68 (and sometimes U0416-92). The codes do not clear on their own because the software gets stuck. A dealer reflash of the millimeter-wave radar or VSA control unit resolves it. This is the most common scenario on late-model Hondas.
2. Low battery voltage. Voltage below roughly 12.4 V is enough to corrupt CAN bus data. A battery that reads fine at rest but sags under load can produce intermittent U0416-68 at startup. Load-test the battery before anything else.
3. Corroded or loose VSA module connector. The VSA modulator sits in the engine bay and its multi-pin connector is exposed to moisture. Corrosion on the 12 V supply pin, a ground pin, or the CAN-H/CAN-L pair can stop communication entirely. Inspect the connector under magnification and clean it with electrical contact cleaner.
4. Wheel speed sensor fault. Each wheel speed sensor feeds data to the VSA module. A damaged sensor, broken tone ring, or chafed sensor wire can send erratic signals that the VSA module classifies as invalid, causing it to flag U0416-68 upstream. Live data showing one wheel speed dropping to zero or jumping erratically while others track normally points here.
5. CAN bus wiring damage. Rodent damage, chafing against chassis metal, or wiring pulled tight after a minor front collision can break the CAN-H or CAN-L wire serving the VSA node. A CAN bus resistance check (should read approximately 60 ohms between CAN-H and CAN-L at the VSA connector with the module unplugged) confirms line integrity.
6. VSA modulator-control unit failure. The modulator itself failing is the least common cause but does occur on high-mileage vehicles. Honda requires replacement units to be programmed and calibrated with Honda i-HDS before the light will clear.
Diagnosis steps
Follow this sequence to avoid replacing expensive parts that are not at fault:
- Battery test first. Load-test the battery and record voltage under load. Replace it if it fails. Clear all codes and recheck - if U0416-68 is gone, the battery was the problem.
- Check for Honda TSB applicability. If the code appeared right after a battery disconnect or replacement on a 2016-2021 Civic, 2017-2022 CR-V, 2016-2021 Accord, or 2018-2020 Odyssey, take the vehicle to a Honda dealer for a software update under TSBs ATS161223 or A17-064. This is often a no-charge repair if the vehicle is in the affected range.
- Inspect the VSA module connector. With the ignition off, unplug the main VSA connector and examine all pins for corrosion, bent terminals, or moisture. Clean with contact cleaner, reseat firmly, and recheck.
- Scan for companion codes. U0416-68 rarely appears alone. Related ABS codes (C1xxx series) or additional network codes narrow the fault to a specific sensor or bus node.
- Monitor live wheel speed data. Drive at low speed while a scan tool monitors all four wheel speed channels. A dropout or outlier reading on one channel points to that sensor or its wiring.
- CAN bus resistance check. With the VSA module connector unplugged and the ignition off, measure resistance across the CAN-H and CAN-L pins in the harness connector. Around 60 ohms is correct. A reading near zero indicates a short; an open reading (over-limit) indicates a broken wire.
Repair and cost
Battery replacement typically costs $150-$250 and resolves the issue when the battery is the root cause. This is fully DIY.
Software update (TSB ATS161223 / A17-064) requires Honda i-HDS diagnostic software and is dealer-only. Under warranty or extended warranty coverage it costs nothing; out of warranty, expect a one-hour diagnostic charge ($100-$180) plus the software update labor ($50-$100).
VSA module connector repair - cleaning terminals and repairing a chafed wire - is a DIY job with basic hand tools. Professional wiring repair runs $75-$200 depending on severity.
Wheel speed sensor replacement runs $80-$200 per sensor in parts; shop labor adds $80-$150 per sensor. The sensor at the affected corner must be identified first via live data.
VSA modulator-control unit replacement is the most expensive path. The part alone is $400-$900 depending on the model year, and programming adds another $100-$200 at a Honda dealer. Only pursue this after ruling out all other causes.
Frequently Asked Questions
Q: Can I drive with Honda code U0416-68?
A: Normal braking still works, but VSA and ABS are offline. Short trips at low speed are acceptable if you must move the car, but avoid highway driving or wet/slippery roads. The systems that prevent skidding and wheel lock-up are not functioning.
Q: Will U0416-68 clear itself after fixing the battery?
A: Sometimes, but not always. If the code was set by the Honda software bug (TSB ATS161223), it will not clear on its own even after the battery is fixed - it requires a software update at a dealer to fully reset.
Q: Is U0416-68 the same as U0416?
A: U0416 is the base OBD-II code meaning 'Invalid Data from Vehicle Dynamics Control Module.' The '-68' is Honda's manufacturer sub-type, narrowing it to an event-triggered fault in the VSA system. The diagnosis steps are similar, but the Honda-specific TSBs apply only to the -68 and -92 sub-types.
Q: Does U0416-68 appear with other codes?
A: Yes, frequently. After a battery disconnect you may also see U0416-92 (rejected control request by VSA system) and C0051-54 (steering angle neutral position not learned). When a wheel speed sensor is at fault, one or more ABS sensor codes in the C1xxx range usually appear alongside it.
Q: Which Honda models get U0416-68 most often?
A: The code appears across the Honda lineup but is most commonly reported on 10th and 11th generation Civic (2016-2025), 5th generation CR-V (2017-2022), 10th generation Accord (2018-2022), and 5th generation Odyssey (2018-2021). Honda TSBs specifically address these model ranges.