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Chevrolet C0775

On vehicles equipped with keyless/passive start, the vehicle will start if the fob is placed in the fob pocket. In most cases, these concerns cannot be duplicated. The above system

DriveNot yet established by verified evidence. The diagnostic record lists safe-to-drive status as unknown.
ChargeNot yet established by verified evidence. The diagnostic record lists safe-to-charge status as unknown.
ServiceContact a Chevrolet dealer or qualified service provider if C0775 recurs, starting is unreliable, keyless/passive functions remain inoperative, or warning messages persist. Verified evidence does not establish whether service is required in every case.
Confidence95%

Quick answer

C0775 is listed in Chevrolet bulletin PIC5650 as a possible accompanying DTC for intermittent keyless/passive-entry, remote-keyless-entry, starting, security-message, or tire-pressure-monitor concerns. The bulletin identifies radio-frequency interference from some aftermarket devices as a possible contributor. For keyless/passive-start vehicles, Chevrolet states the vehicle will start if the fob is placed in the fob pocket.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

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DTC Chevrolet C0775 Short ExplanationMaxidot Chevrolet

Videos are supporting material and never override OEM or regulator evidence.

1. What does C0775 mean?

C0775 is listed in Chevrolet bulletin PIC5650 as a possible accompanying DTC for intermittent keyless/passive-entry, remote-keyless-entry, starting, security-message, or tire-pressure-monitor concerns. The bulletin identifies radio-frequency interference from some aftermarket devices as a possible contributor. For keyless/passive-start vehicles, Chevrolet states the vehicle will start if the fob is placed in the fob pocket.

2. Technical explanation

The supplied verified evidence does not provide a conventional component-level definition for C0775. It establishes that C0775 may be present with concerns including intermittent no-crank, intermittent no-start or start-and-stall, security/theft warning or message, poor/no RKE range, inoperative keyless/passive entry or start, a No Fob Detected message, and a Service Tire Pressure Monitor message. Chevrolet bulletin PIC5650 states that these systems use radio frequency (RF) to transmit information and that some aftermarket devices can create RF interference (RFI) that can jam the RF being transmitted. The bulletin also notes that these concerns often cannot be duplicated.

3. What system is affected?

The verified evidence associates C0775 with RF-based remote keyless entry, keyless/passive entry and start, security/theft indication, and tire-pressure-monitor functions. A specific control module or failed component is not yet established by verified evidence.

4. How serious is this code?

Unknown. The diagnostic record classifies severity as unknown.

5. Symptoms you may notice

  • Intermittent no crank.
  • Intermittent no start or start and stall.
  • Security/theft light or message.
  • Poor or no remote keyless entry (RKE) range.
  • Keyless or passive entry/start inoperative.
  • No Fob Detected message.
  • Service Tire Pressure Monitor message.
  • C0775 may be stored with these concerns.

6. Possible causes

  • Radio-frequency interference from some aftermarket devices may jam RF transmissions used by the affected systems.
  • Any additional cause or a specific failed part is not yet established by verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence. The diagnostic record lists safe-to-drive status as unknown.

8. Can I charge the vehicle?

Not yet established by verified evidence. The diagnostic record lists safe-to-charge status as unknown.

9. What you can safely do

  • On vehicles equipped with keyless/passive start, place the fob in the vehicle’s fob pocket if the vehicle does not detect it; Chevrolet states the vehicle will start in this condition.
  • Record any warning messages, starting behavior, RKE range concern, and whether the condition is intermittent.
  • Seek Chevrolet service diagnosis if the concern persists or returns.

10. Step-by-step troubleshooting

  1. Check whether the reported concern matches one of the symptoms listed in Chevrolet bulletin PIC5650.
  2. Consider whether an aftermarket device may be creating RF interference, as identified in the bulletin.
  3. Because Chevrolet states these concerns often cannot be duplicated, provide a clear description of when and where the condition occurs to the servicing dealer.
  4. Do not attempt high-voltage system repair; no high-voltage fault or repair procedure is established by the supplied evidence.

11. When to contact service

Contact a Chevrolet dealer or qualified service provider if C0775 recurs, starting is unreliable, keyless/passive functions remain inoperative, or warning messages persist. Verified evidence does not establish whether service is required in every case.

12. What the service center may check

  • Confirm the stored diagnostic codes and reported symptoms.
  • Evaluate the RF-based systems identified in Chevrolet bulletin PIC5650.
  • Assess possible aftermarket-device RF interference in accordance with Chevrolet service information.
  • A specific test sequence, component inspection, or repair procedure is not included in the supplied verified evidence.

13. Possible repair or resolution

  • If RF interference from an aftermarket device is confirmed, addressing that interference may resolve the associated concern.
  • Any other repair resolution is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Chevrolet PIC5650L, NHTSA Manufacturer Communication MC-11007196-0001, published September 6, 2024.
  • Chevrolet PIC5650K, NHTSA Manufacturer Communication MC-10237659-9999, published May 15, 2023.
  • Chevrolet PIC5650J, NHTSA Manufacturer Communications MC-10201176-9999 and MC-10201252-9999, published July 21, 2021.
  • Chevrolet PIC5650H, NHTSA Manufacturer Communication MC-10178384-9999, published July 24, 2020.
  • Chevrolet PIC5650G, NHTSA Manufacturer Communication MC-10174861-9999, published April 27, 2020.
  • Chevrolet PIC5650F, NHTSA Manufacturer Communication MC-10154604-9999, published December 17, 2018.
  • Chevrolet PIC5650D, NHTSA Manufacturer Communication MC-10126982-9999, published December 19, 2017.
  • Chevrolet PIC5650C, NHTSA Manufacturer Communication MC-10123252-9999, published October 13, 2017.

16. Recall information

  • No recall information was supplied in the verified evidence.

17. Official manufacturer information

Official source: Chevrolet bulletin PIC5650 revisions, published through NHTSA. Latest supplied record: https://static.nhtsa.gov/odi/tsbs/2024/MC-11007196-0001.pdf

19. Frequently asked questions

What does C0775 mean?

The supplied evidence associates C0775 with Chevrolet bulletin PIC5650 and RF-based keyless/passive-entry, starting, RKE, security, and tire-pressure-monitor concerns. A standalone component-level definition is not yet established by verified evidence.

Can placing the fob in the fob pocket help?

Yes. Chevrolet states that on vehicles equipped with keyless/passive start, the vehicle will start if the fob is placed in the fob pocket.

Can an aftermarket device cause this concern?

Chevrolet states that some aftermarket devices can create RF interference that jams RF transmissions used by the affected systems.

Is C0775 an EV high-voltage battery fault?

Not yet established by verified evidence. The supplied bulletin concerns RF-based vehicle systems and does not identify a high-voltage battery fault.

20. Sources & verification

Verified
Chevrolet C0775: On vehicles equipped with keyless/passive start, the… | EV Diagnostics