P2609 on RAM
Intake Air Heater System Performance
P2609 on RAM vehicles indicates intake air heater system performance. Au7o has documented this code across 1 RAM model — most commonly on 2500. A rationality/performance code: the PCM monitors the overall intake air heater system (via intake air temperature response after the heater is commanded on) and determines the system is not heating intake air as expected, even though no specific circuit fault is present. Typical repair costs on RAM range from $300 to $18,000, depending on the specific model and root cause.
Common Causes of P2609
- •Weak or partially failed intake air heater element(s)
- •Faulty intake air heater relay
- •Intake air temperature sensor inaccuracy
- •High resistance in the heater power circuit
- •Low system voltage to the heater
P2609 on RAM by Model
RAM 2500(1 issue)
- 6.7L Cummins Grid Heater Bolt Failure (Bolt Drops Into Cylinder #6)2007-2024
The intake grid (air) heater warms incoming air for cold starts and carries up to ~200 amps through a small threaded stud/bolt secured by a 10mm nut on the intake plenum. Over years of high-current heat cycling the bolt/nut connection deteriorates, arcs, and can break loose. Because it sits directly above the intake runner, gravity pulls the heavy steel stud straight into cylinder #6, destroying the piston, valves, and cylinder head, often the entire engine. Banks Power has documented 200+ failures, some at as little as 40,000 miles. Stellantis has NOT recalled the grid heater assembly itself (a separate 2021-2022 relay recall Y08/Y76 addressed sticking relays, not the bolt).
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View P2609 across all makes →Frequently Asked Questions
What does P2609 mean on RAM?▼
P2609 stands for "Intake Air Heater System Performance." A rationality/performance code: the PCM monitors the overall intake air heater system (via intake air temperature response after the heater is commanded on) and determines the system is not heating intake air as expected, even though no specific circuit fault is present. On RAM specifically, this code is documented across 1 model.
What causes P2609 on RAM vehicles?▼
Common causes on RAM: Weak or partially failed intake air heater element(s), Faulty intake air heater relay, Intake air temperature sensor inaccuracy, High resistance in the heater power circuit, Low system voltage to the heater. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2609 on a RAM?▼
Repair costs on RAM range from $300 to $18,000, depending on the specific model and root cause.
Which RAM models have P2609 documented?▼
Au7o has documented P2609 on 1 RAM model: 2500.