Volvo P059800
If any of above DTC´s are set in the ECM or CEM for the pre-heated thermostat in the cooling system, and/or if the customer complains of a charging system war
Quick answer
For a 2016 Volvo XC90 in the US, DTC P059800 is documented by Volvo’s Technical Journal TJ30268.6.0 in connection with the pre-heated thermostat in the cooling system. The supplied evidence does not establish the exact fault meaning beyond that wording.
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 P059800 mean?
For a 2016 Volvo XC90 in the US, DTC P059800 is documented by Volvo’s Technical Journal TJ30268.6.0 in connection with the pre-heated thermostat in the cooling system. The supplied evidence does not establish the exact fault meaning beyond that wording.
2. Technical explanation
NHTSA-hosted Volvo manufacturer communication 10168505 (Technical Journal TJ30268.6.0, published April 4, 2017) lists P059800 as an intermittent ECM DTC. The journal discusses DTCs in the ECM or CEM related to the pre-heated thermostat in the cooling system and also references a customer complaint described in the source as a “charging system war” (the supplied source text is truncated).
3. What system is affected?
Engine cooling system; specifically the pre-heated thermostat. The ECM is identified as the reporting control module for P059800.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- P059800 may be stored intermittently in the ECM.
- The source also references a customer complaint beginning “charging system war,” but the supplied evidence does not provide the complete warning wording or establish it as a symptom of P059800 alone.
6. Possible causes
- A relationship to the pre-heated thermostat in the cooling system is established by the technical journal.
- The specific underlying cause of P059800 is not yet established by verified evidence.
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
- Have the vehicle inspected by a qualified Volvo service facility.
- Record any warning messages and whether the code returns after clearing.
- Do not attempt high-voltage or electrical-system repair based on this code alone.
10. Step-by-step troubleshooting
- Use Volvo VIDA to read and reset DTCs, as listed in Technical Journal TJ30268.6.0.
- Further diagnostic steps are not established by the supplied verified evidence.
11. When to contact service
Contact an authorized Volvo retailer or qualified Volvo service facility, particularly if a warning message is present or P059800 returns.
12. What the service center may check
- Read/reset/confirm DTCs with VIDA.
- Review the pre-heated thermostat cooling-system concern described in Volvo Technical Journal TJ30268.6.0.
- The supplied evidence lists thermostat replacement under operation number 26214-2, but does not establish that replacement is required for every occurrence of P059800.
13. Possible repair or resolution
- The technical journal lists a thermostat replacement operation (26214-2) and a VIDA DTC read/reset operation (36001-2).
- A definitive repair for this individual vehicle is not yet established by verified evidence.
14. Affected vehicles
- Volvo XC90 · 2016 · US
15. Related TSBs / service bulletins
- Volvo Technical Journal TJ30268.6.0, NHTSA Manufacturer Communication 10168505, published April 4, 2017. It applies in the supplied data to the 2016 Volvo XC90, US market, and lists P059800 as an intermittent ECM DTC in the context of the pre-heated thermostat cooling system.
16. Recall information
- No recall is established by the supplied verified evidence.
17. Official manufacturer information
Official source: NHTSA-hosted Volvo Manufacturer Communication 10168505, Technical Journal TJ30268.6.0: https://static.nhtsa.gov/odi/tsbs/2017/MC-10168505-9999.pdf
19. Frequently asked questions
What does Volvo P059800 mean?
The supplied Volvo technical-journal evidence identifies P059800 as an intermittent ECM DTC associated with the pre-heated thermostat in the cooling system. A more specific fault definition is not established by the evidence provided.
Which vehicle is covered by the supplied evidence?
The supplied applicability record identifies a 2016 Volvo XC90 in the United States.
Does P059800 require thermostat replacement?
The journal lists thermostat replacement as a service operation, but the supplied evidence does not establish that every P059800 case requires replacement.