By iCarsoft Official Store Technical Team, Automotive Diagnostics Editors · Updated October 11, 2026 · OEM technical references checked
Quick Answer
The C0077 code requires the full OEM description. In this guide’s documented application it concerns measured tire pressure and TPMS architecture; it does not prove a failed tire sensor, puncture or universal TPMS software fault. Save the original scan, confirm Chrysler low-pressure records and Honda C0077-78 examples; identify the exact vehicle and suffix, and follow the matched electrical, physical and setup checks before choosing a repair.
What Does the C0077 Code Mean?
For the documented OEM branch, the C0077 code concerns measured tire pressure and TPMS architecture. Confirm the vehicle, reporting module and full wording before using this guide. The full fault record determines the test branch.
A tire-pressure warning must first be compared with a physical cold-pressure measurement. Direct systems use wheel sensors; indirect systems infer tire behavior using other vehicle signals. These architectures have different diagnosis and relearn requirements. Do not buy a valve-mounted sensor until the installed system is identified.
The most useful comparison is between the controller record and an independent observation of measured tire pressure and TPMS architecture. A displayed number or a successful erase command cannot establish the physical condition. Preserve the original event before changing parts or setup so a later result can be compared with the same operating state.
Honda bulletin 17-005 documents C0077-78 on 2015–2017 Fit vehicles with a threshold-refinement concern associated with steady grades. Its repair includes applicable VSA software and setup requirements. It is not permission to dismiss a warning, skip pressure measurement or apply Honda calibration instructions to another model.
Chrysler service records also show C0077-00 as low tire pressure. A Chrysler base-code record and Honda’s VSA refinement suffix are distinct evidence. Correct inflation, an air leak, a direct sensor fault and an indirect-system calibration issue should not be treated as interchangeable causes.
Save the full module wording and suffix before clearing; they can change the test path.
Separate C0077 from adjacent fault families
| Code | General description | Key distinction |
|---|---|---|
| C0077 | low-tire-pressure related fault; full TPMS/VSA suffix determines the application | This guide’s OEM-scoped branch; retain the full suffix. |
| U0121 | Lost communication with ABS controller | A communication prerequisite is different from a particular sensor or switch fault. |
| P0562 | System voltage low | Check a documented shared supply issue without assuming it caused every stored code. |
Record the complete C0077 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.
C0077 Symptoms and Likely Causes
Record C0077 symptoms and fault status; symptoms alone cannot identify a failed part.
Check whether companion faults share a proven cause.
Record when this occurs and compare it with the complete C0077 record. It is an observation to investigate, not proof of a failed part. Preserve whether the condition began after tire replacement, rotation, pressure adjustment or TPMS service.
Record when this occurs and compare it with the complete C0077 record. It is an observation to investigate, not proof of a failed part. Preserve whether the condition began after tire replacement, rotation, pressure adjustment or TPMS service.
Record when this occurs and compare it with the complete C0077 record. It is an observation to investigate, not proof of a failed part. Preserve whether the condition began after tire replacement, rotation, pressure adjustment or TPMS service.
Record when this occurs and compare it with the complete C0077 record. It is an observation to investigate, not proof of a failed part. Preserve whether the condition began after tire replacement, rotation, pressure adjustment or TPMS service.
Practical cause-checking order
- Actual low cold inflation pressure: Confirm this branch with the matched OEM inspection and measured evidence. It is a possibility, not a proven failure.
- Tire, wheel or valve leakage/damage: Confirm this branch with the matched OEM inspection and measured evidence. It is a possibility, not a proven failure.
- Incorrect tire fitment or changed rolling behavior: Confirm this branch with the matched OEM inspection and measured evidence. It is a possibility, not a proven failure.
- Direct-sensor/relearn issue if that architecture is installed: Confirm this branch with the matched OEM inspection and measured evidence. It is a possibility, not a proven failure.
- Applicable indirect-system calibration or software concern: Confirm this branch with the matched OEM inspection and measured evidence. It is a possibility, not a proven failure.
Did C0077 appear after recent tire replacement, rotation, pressure adjustment or TPMS service? 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.
How Serious Is C0077, and Can You Drive?
Follow the owner manual and current warnings. This code cannot establish a safe driving distance or prove that assistance is available. Stop safely for abnormal braking, steering, handling or tire condition and obtain qualified inspection or towing. A stored code and an active warning require different assessment; neither should be interpreted without the physical condition.
Record warning messages, operating conditions and service history. Do not induce wheel slip, emergency braking or a handling event on public roads. A red stop warning or abnormal control overrides any verification plan.
Stop and arrange a tow if a tire is visibly damaged or severely underinflated, handling is abnormal, or the owner manual requires stopping.
Do not work under an unsupported vehicle, bypass a safety interlock or probe restraint deployment circuits. Follow OEM shutdown, access and support instructions. Brake hydraulic work, wheel-end work and control-system setup require qualified equipment and verification; a generic scan report is not a safety certificate.
How to Diagnose C0077 in the Right Order
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Identify the OEM branch and preserve evidence
Record the complete code and module, then identify direct or indirect TPMS. Save the warning pattern and any tire-service history before resetting. Record the result and resolve failed prerequisites before continuing.
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Inspect the relevant physical condition
Measure all applicable tires cold with a suitable gauge and compare with the vehicle placard. Do not use the tire sidewall maximum as the inflation target. Record the result and resolve failed prerequisites before continuing.
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Confirm architecture and prerequisites
Inspect for punctures, valve leakage, damage and incorrect fitment. A visibly damaged or severely underinflated tire must be assessed before driving. Record the result and resolve failed prerequisites before continuing.
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Separate circuit from system behavior
On direct TPMS, check available sensor identification and status using the correct equipment. On indirect TPMS, follow the applicable calibration prerequisites instead. Record the result and resolve failed prerequisites before continuing.
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Prove the repair path before parts
If pressures and physical condition are correct, check the precise OEM bulletin and software applicability. A Honda C0077-78 example is not a universal software fix. Record the result and resolve failed prerequisites before continuing.
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Verify the original condition after repair
Complete the required reset/relearn/calibration only after the physical problem is resolved. Recheck pressure stability and warning status under OEM conditions. Record the result and resolve failed prerequisites before continuing.
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.
C0077 Repairs and Cost Planning
A C0077 repair must address the demonstrated failure. Do not replace an assembly from the code alone.
Recheck installation and required setup after repair. For this branch, possible repair paths include correct pressure and repair the demonstrated tire or valve leak; correct verified tire-fitment or wheel damage; service or relearn a proven direct tpms sensor fault. They are alternatives selected by evidence, not a shopping list. A software or calibration step should be performed only where the applicable manufacturer procedure requires it and its prerequisites are met.
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 |
|---|---|
| Correct pressure and repair the demonstrated tire or valve leak | VIN-specific quote |
| Correct verified tire-fitment or wheel damage | VIN-specific quote |
| Service or relearn a proven direct TPMS sensor fault | VIN-specific quote |
| Apply applicable OEM software/calibration only when supported | 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.
Using iCarsoft CR Eagle P for C0077
On a supported vehicle, iCarsoft CR Eagle P can save accessible faults, available freeze frame, live data and diagnostic reports. Preserve the C0077 evidence before clearing.
Compare the saved and final module records. Scan data supports diagnosis but does not replace the OEM reference, physical measurement or safety-system functional check.
Preserve the measured tire pressure and TPMS architecture evidence
iCarsoft CR Eagle P
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 C0077-specific function.
Check current CR Eagle P price and availabilityCheck CR Eagle P 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 measured tire pressure and TPMS architecture. Where required, use a suitable tire-pressure gauge and architecture-specific TPMS or VSA service equipment and compare reported values with the relevant measured evidence.
Verify the C0077 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 measured tire pressure and TPMS architecture, 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 this chassis system.
Compare the original and final fault status. Record the functional-check result and whether the original event returned.
If C0077 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 or steering verification separately from code clearing.
Verification follows the system involved. After saving the original evidence, use the OEM procedure to clear erasable records, complete any required calibration or functional check, and compare the final module status with the original warning and fault conditions.
Related Measured Tire Pressure And TPMS Architecture Code Guides
Compare the related monitor families below. Shared symptoms or components do not make their repair procedures interchangeable.
C0077 Frequently Asked Questions
Does C0077 have one meaning on every vehicle?
No. This guide uses Chrysler low-pressure records and Honda C0077-78 examples; identify the exact vehicle and suffix. Read the full module wording and suffix first. Another manufacturer’s description must be diagnosed with its own current service information; the shared base code does not make the procedures interchangeable.
What should I check first for C0077?
Save every module's codes and freeze frame before clearing. Confirm the full definition, suffix and VIN architecture. Then inspect recent tire replacement, rotation, pressure adjustment or TPMS service, connectors and shared supplies. Those facts determine whether the next test needs a suitable tire-pressure gauge and architecture-specific TPMS or VSA service equipment or a manufacturer-specific functional procedure.
Can I drive with the C0077 code?
Follow the owner manual and current warnings. This code cannot establish a safe driving distance or prove that assistance is available. Stop safely for abnormal braking, steering, handling or tire condition and obtain qualified inspection or towing. A stored code and an active warning require different assessment; neither should be interpreted without the physical condition.
Why did C0077 return after a part was replaced?
An unresolved supply, connection, physical installation or setup issue can remain after replacement. Recheck measured tire pressure and TPMS architecture against the original full code and operating conditions. Confirm that the installed part and the service procedure match the VIN; another clean scan at a different operating state does not explain the original failure.
What should a C0077 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 Eagle P diagnose and clear C0077?
On a supported vehicle, CR Eagle P can organize available faults, freeze frame, live data and reports, and can clear erasable records after repair. Confirm exact ECU coverage. It cannot replace the OEM functional procedure or physical measurements for the measured tire pressure and TPMS architecture.
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
- Honda 17-005: Low Tire Pressure/TPMS Indicator Is On with VSA DTC C0077-78. Application-specific OEM reference; use current VIN instructions, not a universal procedure.
- NHTSA tire safety guidance. Cold inflation, vehicle placard and physical tire condition; not a universal code-monitor threshold.
Product information: Official iCarsoft CR Eagle P 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.
