P017E on Audi
Cylinder Head Temperature Sensor - Open Circuit / Loose Contact
P017E on Audi vehicles indicates cylinder head temperature sensor - open circuit / loose contact. Au7o has documented this code across 2 Audi models — most commonly on RS Q8, SQ8. The engine control module has lost the cylinder head temperature sensor signal entirely - the circuit reads open or the contact is intermittent. The ECM cannot determine head temperature and substitutes a fail-safe value, usually with maximum fan operation and a coolant warning. On the Audi 4.0T V8 (TSB 2062951) this comes from corrosion or contact damage inside coolant temperature sender G407 after water intrusion past a failed O-ring.
Common Causes of P017E
- •Corroded or damaged contacts inside the G407 coolant temperature sender following moisture ingress (Audi TSB 2062951)
- •Loose, backed-out, or unseated sensor connector
- •Broken or chafed wire between the sensor and ECM
- •Internally open sensor element
P017E on Audi by Model
Audi RS Q8(1 issue)
- 2020-Early 2021 RS Q8 Red Coolant Warning - Check G407 per TSB 2062951/42020-2021
Audi TSB 2062951/4 covers all 2020 RS Q8 vehicles and early-production 2021 vehicles through chassis WUARRDF11MD011353 when a red coolant warning appears and the engine controller stores P218100, P017B00, P017C00 or P017E00. Audi documents that a damaged or pinched O-ring can allow moisture to reach coolant temperature sender G407. This bounded sensor condition does not establish universal turbo-coolant hose, pump or heat-related failure.
Audi SQ8(1 issue)
- 2020-Early 2021 SQ8 Red Coolant Warning - Check G407 per TSB 2062951/42020-2021
Audi TSB 2062951/4 covers all 2020 SQ8 vehicles and early-production 2021 vehicles through chassis WA1CWBF17MD010458 when a red coolant warning appears and the engine controller stores P218100, P017B00, P017C00 or P017E00. Audi documents that a damaged or pinched O-ring can allow moisture to reach coolant temperature sender G407. This bounded sensor condition does not establish universal turbo-coolant hose, pump or heat-related failure.
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View P017E across all makes →Frequently Asked Questions
What does P017E mean on Audi?▼
P017E stands for "Cylinder Head Temperature Sensor - Open Circuit / Loose Contact." The engine control module has lost the cylinder head temperature sensor signal entirely - the circuit reads open or the contact is intermittent. The ECM cannot determine head temperature and substitutes a fail-safe value, usually with maximum fan operation and a coolant warning. On the Audi 4.0T V8 (TSB 2062951) this comes from corrosion or contact damage inside coolant temperature sender G407 after water intrusion past a failed O-ring. On Audi specifically, this code is documented across 2 models.
What causes P017E on Audi vehicles?▼
Common causes on Audi: Corroded or damaged contacts inside the G407 coolant temperature sender following moisture ingress (Audi TSB 2062951), Loose, backed-out, or unseated sensor connector, Broken or chafed wire between the sensor and ECM, Internally open sensor element. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P017E on a Audi?▼
Repair costs vary widely depending on the root cause and specific Audi model.
Which Audi models have P017E documented?▼
Au7o has documented P017E on 2 Audi models: RS Q8, SQ8.