C0087 — ISO/SAE Reserved #

Note: The code label and meaning may vary depending on the vehicle manufacturer.

• ISO/SAE Reserved — Generic (All OEMs)
• Reserved Code — Chrysler
• Reserved by SAE — Ford
• ISO Reserved — GM

Summary of code C0087 #

The C0087 diagnostic trouble code (DTC) is identified as an ISO/SAE Reserved code. This means that the code is set aside by the International Organization for Standardization (ISO) and the Society of Automotive Engineers (SAE) for future use or specific manufacturer applications. In most cases, it does not indicate a specific fault recognized by the generic OBD-II/EOBD system. Instead, it may appear during advanced diagnostics, software updates, or due to a scan tool compatibility issue. Some OEMs may use this code for proprietary functions, but it is most often a placeholder rather than a direct indicator of a system failure.

Common symptoms for DTC C0087 #

Typically, the presence of C0087 does not result in noticeable symptoms for the driver. Because it is a reserved code, it rarely triggers the check engine light or warning messages. However, in rare cases—especially when proprietary OEM software is involved—you might experience minor, non-specific behaviors if the code is used internally by the vehicle’s control modules.

• No apparent symptoms (most common)
• Check engine light or service message (rare, OEM-specific)
• Minor electronic glitches during diagnostics or software updates
• Scan tool communication errors or incomplete code descriptions

Probable causes for code C0087 (by frequency) #

When C0087 appears, it is usually not due to an actual hardware or sensor fault. The most frequent causes relate to scan tool limitations, software anomalies, or rare manufacturer-specific uses. Understanding these will help you avoid unnecessary repairs.

1. Scan tool software incompatibility or outdated firmware
2. Non-OEM diagnostic tool misreading proprietary codes
3. Vehicle control module (ECU or BCM) software update in progress
4. OEM-specific diagnostic mode or internal testing
5. Unintended readout during module replacement or coding

Step-by-step diagnosis for C0087 #

Since C0087 often does not represent a true fault, a careful and methodical approach is key. Follow these steps to clarify the situation and prevent unnecessary part replacements or repairs.

• Verify the scan tool: Ensure you are using an up-to-date and OEM-approved diagnostic scanner.
• Double-check code definition: Consult official OEM documentation or a reputable repair database to confirm the code’s meaning for your specific vehicle.
• Clear the code: Reset the code and observe if it returns during a normal drive cycle or after a system self-test.
• Check for related codes: Look for any associated DTCs that might indicate a genuine system fault.
• Review recent work: Note any recent software updates, module programming, or diagnostic tool changes.
• Contact OEM support: If the code persists and is not documented, consult the vehicle manufacturer’s technical assistance or dealer network.

Possible repairs for C0087 #

Because this is a reserved code, direct repairs are rarely needed. The focus should be on verifying tool compatibility and ensuring all vehicle systems are operating as intended. If the code is linked to OEM-specific functions, follow the manufacturer’s repair procedures.

• Update scan tool software or firmware
• Use an OEM diagnostic interface or tool
• Re-flash or update vehicle control module software (if instructed by OEM)
• Clear the code and monitor for recurrence
• No repair needed if no symptoms or related codes are present

Is it safe to drive with code C0087? #

Yes, in most cases, you can safely drive with code C0087 present. Since it is a reserved code, it typically poses no risk to vehicle performance, safety, or emissions compliance. However, if you notice any unusual symptoms or if the code is accompanied by other active DTCs, have the vehicle inspected by a qualified technician to rule out underlying issues.

Vehicles most commonly affected by C0087 #

This reserved code can potentially appear on any vehicle equipped with OBD-II/EOBD, especially during deep diagnostic sessions or with generic scan tools. However, it is most often reported on models from manufacturers that use proprietary diagnostic protocols or during aftermarket scan tool use.

• General Motors (Chevrolet, GMC, Cadillac, Buick)
• Ford (including Lincoln and Mercury)
• Chrysler (Dodge, Jeep, RAM)
• Some European and Asian makes during advanced diagnostics
• Vehicles undergoing module programming or software updates

Common mistakes & best practices regarding C0087 #

Misinterpreting C0087 as a genuine fault is a frequent error, leading to unnecessary part replacements or service visits. Following best practices can save time and prevent frustration.

• Do not replace parts based solely on this code—verify its relevance first.
• Always confirm the code definition with OEM or technical resources.
• Keep your diagnostic equipment updated and use OEM-approved tools when possible.
• Document any module programming or software changes for reference.
• Monitor for related codes or symptoms before considering repairs.

FAQ express — C0087 #

Here are quick answers to the most common questions about C0087:

• Q: Can C0087 cause my check engine light to come on?
  A: Almost never. This reserved code typically does not trigger dashboard warnings and is seen primarily during advanced diagnostics.
• Q: Should I worry about passing emissions with this code?
  A: No, C0087 is not related to emissions system faults and has no impact on inspection results.
• Q: Can I ignore this code if my car runs fine?
  A: Yes, if there are no symptoms or related DTCs, this code can be safely ignored.