By iCarsoft Official Store Technical Team, Automotive Diagnostics Editors · Updated October 12, 2026 · OEM technical references checked
Quick Answer
C0516 describes right rear wheel speed sensor intermittent/erratic in the documented application. It does not prove a failed sensor, hub or axle. Save the original scan, confirm VIN scope and use the matched approved wheel-speed live data, wiring tests and the VIN-specific ABS procedure before choosing a repair.
1What Does the C0516 Code Mean?
For the documented application, C0516 concerns right rear wheel speed sensor intermittent/erratic. Confirm the vehicle, reporting module and full wording before using this guide. The full fault record determines the test branch.
The ABS controller evaluates right-rear wheel-speed behavior against the other channels. Intermittent or erratic data can reflect electrical integrity, signal production, target movement, tire fitment or network interpretation; the code does not select a component. The right-rear erratic monitor can be affected by wheel-end movement that only appears under rotation. Inspect the permitted sensor-to-target relationship, bearing movement and harness strain, but do not force a sensor, scrape a tone ring or transfer an active-sensor test to a passive design. If the data becomes unstable during a particular wheel position, preserve that pattern and compare it with the physical target. If it changes when the harness is moved, return to connector and terminal integrity. The GM axle-runout example is a manufacturer-specific clue, not a universal repair instruction. A repeatable dropout at one wheel position points the inspection toward that wheel end, while a disturbance that follows harness movement points toward the circuit. Keep those observations separate in the final repair record. Keep the right-rear channel identified when comparing synchronized wheel-speed traces.
C0516 concerns right-rear behavior over time; it does not identify a sensor or hub by itself.
GM PIT6114 lists C0516 with related rear WSS faults for specified 2024 Silverado/Sierra dual-rear-wheel vehicles and describes axle-shaft runout as one bounded cause. Use current vehicle-specific service information rather than transferring its axle example.
The right-rear channel can fail only with wheel rotation, suspension movement, moisture or heat. Capture the event and compare all four channels before disturbing the hub or harness. A right-rear warning can disable or reduce ABS, traction or stability functions even if the vehicle still feels normal. Follow the owner manual and do not provoke wheel slip on the road. Verification should include the original erratic condition, all companion brake-controller codes and a safe functional check required by the vehicle maker.
Save the full module wording and suffix before clearing; they can change the test path.
Separate C0516 from adjacent fault families
| Code | General description | Key distinction |
|---|---|---|
| C0516 | Right Rear Wheel Speed Sensor Intermittent/Erratic | This guide’s documented application; retain the full suffix. |
| U0121 | Lost communication with ABS controller | A communication or network condition is different from a particular sensor or actuator fault. |
| P0562 | System voltage low | Check a documented shared-supply issue without assuming it caused every stored code. |
Record the complete C0516 description. The suffix, reporting module and companion faults can change the diagnostic path. Use the manufacturer's full wording and test procedure for the exact vehicle.
2C0516 Symptoms and Likely Causes
Record C0516 symptoms and fault status; symptoms alone cannot identify a failed part.
Check whether companion faults share a proven cause.
Record the exact warning, when it appeared and whether it changes with the monitored function. It is evidence to investigate, not proof of a failed part.
Compare the saved report with supported live data and operating conditions. A displayed value can be stale, invalid or unavailable without identifying the cause.
Preserve the service history and inspect the disturbed branch first, while keeping timing as a clue rather than proof.
Save every module’s codes and status. A related communication, voltage, warning or performance code can change the diagnostic order.
Practical cause-checking order
- Power, ground, connector or wake-state problem affecting the right-rear wheel-speed signal: Right-rear sensor dropout or erratic signal
- Open, shorted, corroded, chafed or water-damaged wiring in the monitored path: Right-rear connector, terminal, ground, supply or harness defect
- A target, mechanical, tire or signal relationship problem where the monitor evaluates a physical input: Sensor seating, target/tone-ring, bearing or axle movement
- Gateway, network, configuration, calibration or software condition that changes the reported result: Tire, wheel or part fitment causing unstable monitored data
- Internal sensor, controller or assembly fault only after the external branches pass: Brake controller fault after right-rear input checks pass
Did C0516 appear after recent rear axle, wheel-bearing, tire, sensor or harness work? Recheck the documented connections, parts and setup steps affected by that work. Record battery and software history; a post-repair code does not prove the new part is defective.
3How Serious Is C0516, and Can You Drive?
Safety-related ABS/traction warning — assess actual operation. Follow the owner manual and current warnings. C0516 cannot establish a safe driving distance or prove that assistance is available. Stop safely if the brake warning is red, braking or handling changes, or the owner manual requires stopping; obtain qualified inspection or towing.
Record brake warnings, pedal changes, fluid loss and recent service. Do not induce wheel slip or emergency braking to test assistance on public roads; warning-state assessment comes before any functional verification.
Stop and arrange a tow if the brake warning is red, braking or handling changes, or the owner manual requires stopping.
Do not work under an unsupported vehicle or bypass a safety interlock. Follow OEM shutdown, access and support instructions. A scan result is not a safety certificate.
4How to Diagnose C0516 in the Right Order
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Identify the application and preserve evidence
Save the complete C0516 record, suffix, reporting module, status, freeze frame and ABS warnings before clearing.
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Inspect the relevant physical and electrical path
Confirm VIN and wheel-speed architecture; PIT6114 is limited to the listed GM dual-rear-wheel application.
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Confirm architecture and prerequisites
Inspect right-rear connector, terminals, sensor seating, target/tone-ring, bearing, axle and harness routing with safe support.
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Separate signal, network or system behavior
Prove right-rear supply/ground or signal path while rotating; check moisture, abrasion and changing clearance without universal resistance values.
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Prove the repair path before parts
Compare right-rear live data with all channels and follow a dropout through rotation, harness movement and recent tire/axle work.
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Verify the original condition after repair
Repair the demonstrated right-rear path, complete ABS verification, reread the brake controller and confirm the erratic event does not return.
Specifications are vehicle-specific. Use the exact VIN specifications, approved test points and required operating state. No generic value or drive cycle can replace the applicable procedure. Manufacturer examples here do not establish specifications for other applications.
5C0516 Repairs and Cost Planning
A C0516 repair must address the demonstrated failure. Do not replace an assembly from the code alone.
Recheck installation and required setup after repair. The GM axle-runout example is bounded to specified dual-rear-wheel trucks; keep it separate from connector and signal checks. A right-rear warning can disable or reduce ABS, traction or stability functions even if the vehicle still feels normal. Follow the owner manual and do not provoke wheel slip on the road. Verification should include the original erratic condition, all companion brake-controller codes and a safe functional check required by the vehicle maker.
Ask the shop to name the failed branch and the measurement supporting each proposed repair.
Authorize diagnosis before parts while the cause remains uncertain.
| Possible path | Quote basis |
|---|---|
| Repair the demonstrated power, ground, connector or network path serving the right-rear wheel-speed signal | VIN-specific quote |
| Correct the proven mechanical, target, tire, mounting, centering or installation condition where applicable | VIN-specific quote |
| Restore configuration, software, calibration or required setup only through the VIN-specific procedure | VIN-specific quote |
| Replace the isolated sensor, controller or assembly only after external evidence and the OEM test support that path | VIN-specific quote |
These are alternative repair paths, not prices to add together. Request a VIN-specific quote separating diagnosis, parts, labor, fluids, taxes, required setup and verification. Ask which failed test supports the proposed repair and whether warranty coverage applies.
6Using iCarsoft CR Pro S for C0516
On a supported vehicle, iCarsoft CR Pro S can save accessible faults, available freeze frame, live data and diagnostic reports. Preserve the C0516 evidence before clearing.
Compare available brake-controller records before and after repair. The report supports diagnosis but cannot replace the OEM physical and functional checks.
Preserve the right-rear wheel-speed signal evidence
iCarsoft CR Pro S
Review supported codes and relevant live data together. Confirm the exact VIN, controller access, PIDs and any requested active test with iCarsoft before purchase; generic product capabilities do not guarantee a C0516-specific function.
Check current CR Pro S price and availabilityCheck CR Pro S compatibility by VINThe official product page describes supported full-system diagnostics, available live data, freeze frame and diagnostic reports; exact controller coverage and active tests depend on the VIN and software. Confirm the requested function by VIN before purchase. Follow OEM prerequisites and stop for abnormal operation.
Know the measurement boundary. Scan data describes ECU-provided information; it does not directly prove the physical condition of the right-rear wheel-speed signal. Where required, use approved wheel-speed live data, wiring tests and the VIN-specific ABS procedure and compare reported values with the relevant measured evidence.
7Verify the C0516 Repair
After repair, verify installation, clearance and required setup. Save the final findings and clear only erasable records as instructed. Battery disconnection is not a repair.
Run the manufacturer's applicable verification conditions in a safe workshop or route. Compare the original operating state with current data for the right-rear wheel-speed signal, and check current and pending faults in related modules. A clean start or idle period does not prove the repair; use the OEM functional check for the affected system.
Compare the original and final fault status. Record the functional-check result and whether the original event returned.
If C0516 returns, compare its suffix, status, failure order and operating conditions with the saved baseline before replacing another part. Revisit the failed branch and inspect anything disturbed. Confirm the prescribed brake-system verification separately from code clearing.
Stored and Active brake-control faults require different decisions. Preserve the original record and follow the OEM confirmation procedure. A cleared display does not prove restored assistance or safe braking.
8Related Right-Rear Wheel-Speed Signal Code Guides
Compare the related monitor families below. Shared symptoms or components do not make their repair procedures interchangeable.
9C0516 Frequently Asked Questions
Does C0516 prove the named component is bad?
No. C0516 describes right rear wheel speed sensor intermittent/erratic, not a confirmed part. It also does not prove a failed sensor, hub or axle. Use the manufacturer’s test sequence to distinguish the relevant branch before replacing parts.
What should I check first for C0516?
Save every module's codes and freeze frame before clearing. Confirm the full definition, suffix and VIN architecture. Then inspect recent rear axle, wheel-bearing, tire, sensor or harness work, connectors and shared supplies. Those facts determine whether the next test needs approved wheel-speed live data, wiring tests and the VIN-specific ABS procedure or a manufacturer-specific functional procedure.
Can I drive with the C0516 code?
Safety-related ABS/traction warning — assess actual operation. Follow the owner manual and current warnings. C0516 cannot establish a safe driving distance or prove that assistance is available. Stop safely if the brake warning is red, braking or handling changes, or the owner manual requires stopping; obtain qualified inspection or towing.
Why did C0516 return after a part was replaced?
Reproduce the event with synchronized wheel-speed data before and after repair; a clean stationary scan is insufficient.
What should a C0516 repair estimate include?
Ask for the failed-test evidence and a VIN-specific breakdown of diagnosis, parts, labor, taxes, required setup and verification. A code alone cannot establish the repair price.
Can CR Pro S diagnose and clear C0516?
On a supported vehicle, CR Pro S can organize available faults, freeze frame, live data and reports, and can clear erasable records after repair. Confirm exact ECU coverage. It cannot establish safe braking from an erase command or replace physical measurements for the right-rear wheel-speed signal.
The iCarsoft Official Store Technical Team maintains the store's fault-code library. This guide organizes published technical references and verified product information; it does not document a hands-on test of a particular vehicle or claim an individual engineer's review.
Technical and cost references
- GM PIT6114 — ABS / Traction Control / Stabilitrak / SES MIL DTCs C0511 C0510 C0516 and/or C0517. NHTSA-hosted GM application bulletin; limited to listed dual-rear-wheel vehicles.
Product information: Official iCarsoft CR Pro S page.
Editorial note: General diagnostic education, not a substitute for the owner's manual, current VIN-specific service information or professional inspection. Test limits, procedures, coverage and costs vary. Related articles provide context; apply only the specifications and repair procedures that match the vehicle. No universal failure rate, repair price or outcome is implied.
