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Chevrolet P0299

If you encounter poor engine performance or CEL on with P0299 during very cold ambient temperatures of 32 degrees Fahrenheit (0 degrees Celsius) and lower, it is advisable to inspe

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Chevrolet service facility for diagnosis, particularly when P0299 occurs with a CEL/MIL and poor or reduced engine performance in temperatures at or below 32°F (0°C).
Confidence95%

Quick answer

For Chevrolet vehicles covered by the supplied bulletins, P0299 may occur with a check-engine light and poor or reduced engine performance in ambient temperatures of 32°F (0°C) or below. Verified bulletin guidance calls for inspection of the air-induction system, including the charge-air cooler on turbocharged engines, for ice restricting airflow or covering related pressure sensors before normal SI DTC diagnostics.

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

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1. What does P0299 mean?

For Chevrolet vehicles covered by the supplied bulletins, P0299 may occur with a check-engine light and poor or reduced engine performance in ambient temperatures of 32°F (0°C) or below. Verified bulletin guidance calls for inspection of the air-induction system, including the charge-air cooler on turbocharged engines, for ice restricting airflow or covering related pressure sensors before normal SI DTC diagnostics.

2. Technical explanation

The verified NHTSA-posted Chevrolet communications describe a cold-weather condition in which restricted airflow may lead to P0299. The bulletins specifically identify ice in the air-induction system or, on turbocharged engines, the charge-air cooler, as a condition to inspect for. Other Chevrolet communications list P0299 among codes that may be associated with a charge-air-cooler/induction-system leak; they direct technicians to follow SI diagnostics. The supplied evidence does not establish a universal P0299 definition or a single cause for every vehicle.

3. What system is affected?

Verified evidence concerns the engine air-induction system, including the charge-air cooler on turbocharged engines and related pressure sensors. This is not established by the supplied evidence as an EV high-voltage or charging-system fault.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Check-engine light/CEL or MIL illuminated.
  • Poor engine performance.
  • Intermittent reduced engine power.
  • The cold-weather bulletin condition is described at 32°F (0°C) or lower.

6. Possible causes

  • In very cold ambient temperatures, ice restricting airflow in the air-induction system or charge-air cooler on turbocharged engines, or ice covering related pressure sensors.
  • A possible leak in the charge-air-cooler/induction systems, as identified in Chevrolet communications that list P0299 among multiple possible DTCs.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Arrange diagnostic service if the CEL/MIL is illuminated, P0299 is stored, or engine performance is poor or reduced.
  • Provide the service facility with the ambient temperature and whether the concern occurred at 32°F (0°C) or below.
  • Do not attempt high-voltage repairs. The supplied evidence does not identify a high-voltage fault for this condition.

10. Step-by-step troubleshooting

  1. For the specified cold-weather condition, Chevrolet bulletin guidance is to inspect the air-induction system, including the charge-air cooler on turbocharged engines, for ice restricting airflow or covering related pressure sensors before following SI DTC diagnostics.
  2. Verify that the latest service information, bulletins, and product information applicable to the specific vehicle have been completed, as directed by PIP5540J.
  3. For the induction-system-leak bulletin scenario, follow SI diagnostics.

11. When to contact service

Contact a Chevrolet service facility for diagnosis, particularly when P0299 occurs with a CEL/MIL and poor or reduced engine performance in temperatures at or below 32°F (0°C).

12. What the service center may check

  • Confirm whether the event occurred during very cold ambient temperatures of 32°F (0°C) or lower.
  • Inspect the air-induction system for ice-related airflow restriction.
  • On turbocharged engines, inspect the charge-air cooler for ice-related airflow restriction.
  • Inspect for ice covering related pressure sensors.
  • Confirm applicable current service information, bulletins, and product information for the individual vehicle.
  • Follow SI diagnostics, including evaluation of possible charge-air-cooler/induction-system leaks where applicable.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied bulletins provide inspection and diagnostic direction but do not establish a single repair for all P0299 events.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PIP5540J, NHTSA manufacturer communication MC-10230697-9999, published December 15, 2022: cold-weather CEL/poor-performance condition; P0299 and P2227 may be associated with restricted airflow.
  • PIP5684C, NHTSA manufacturer communication MC-10182564-9999, published October 22, 2020: P0299 is among numerous codes potentially associated with a charge-air-cooler/induction-system leak; follow SI diagnostics.
  • PIP5684B, MC-10178370-9999, published July 13, 2020.
  • PIP5684A, MC-10176300-9999, published May 5, 2020.
  • PIP5684, MC-10167455-9999, published October 22, 2019.
  • PIP5540D, MC-10154306-9999, published February 19, 2019.
  • PIP5540B, MC-10154566-9999, published December 6, 2018.
  • PIP5540A, MC-10129073-9999, published January 18, 2018.
  • PIP5540, MC-10129051-9999, published January 4, 2018.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official NHTSA-posted Chevrolet communication: PIP5540J / MC-10230697-9999: https://static.nhtsa.gov/odi/tsbs/2022/MC-10230697-9999.pdf

19. Frequently asked questions

Can cold weather be relevant to P0299?

Yes. Chevrolet bulletins describe P0299 with poor engine performance or a CEL in temperatures of 32°F (0°C) or lower, where ice may restrict airflow or cover related pressure sensors.

Is P0299 identified as a charging or high-voltage-battery fault?

Not by the supplied verified evidence. The evidence concerns engine air induction, charge-air cooling on turbocharged engines, and related pressure sensors.

Does P0299 always mean ice is present?

No. The cold-weather bulletins identify ice as an inspection item under the specified conditions. Separate Chevrolet communications also identify a possible charge-air-cooler/induction-system leak scenario and direct SI diagnostics.

Which Chevrolet vehicles are listed in the supplied applicability data?

The supplied applicability records list US Chevrolet Bolt EV, Spark, and Volt entries for 2011–2018 and 2011–2022. The supplied bulletin summaries describe engine and turbocharged-engine systems; exact applicability must be confirmed using the VIN and current Chevrolet service information.

20. Sources & verification

ReferenceVerified
Chevrolet P0299: If you encounter poor engine performance or CEL on… | EV Diagnostics