P023B on 2008-2023 Dodge Challenger (SXT, GT, R/T, R/T Scat Pack, SRT 392, SRT Hellcat, SRT Hellcat Redeye) — Charge Air Cooler Coolant Pump Control Circuit Low
1 vehicles · 1 makes · $140-$1,200 repair
How to diagnose and fix P023B: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Dodge Challenger · 2008–2023
A widely reported electrical complaint across nearly all Challenger model years is excessive parasitic battery drain that leaves the car dead overnight or after sitting a few days. A healthy modern vehicle should settle to roughly 25-50 mA of key-off draw once all modules go to sleep; owners reporting this problem measure anywhere from several hundred milliamps to over 2-4 amps, which is enough to flatten a battery in a day or two. There are several distinct, real-world root causes documented across owner forums (ChallengerTalk, ChallengerForumz, Hellcat.org), NHTSA/CarComplaints filings, and repair sites: 1) Power-window self-cycling — a faulty window switch or window module causes the driver- or passenger-side glass to drop and raise itself a fraction of an inch repeatedly with the key off, running the motor until the battery is dead. 2) TIPM failure — a known weak point on Chrysler/Dodge platforms and a common diagnosis on early (2008-2014) cars. 3) Infotainment / Uconnect radio (RER, 730N, and later Uconnect head units) not entering sleep mode — a hung or buggy radio keeps the accessory bus awake. 4) Stuck switches and accessories — faulty door-jamb/courtesy switches that keep a dome light on, a trunk/glovebox/vanity light staying on, door-lock actuator faults, or aftermarket add-ons (alarms, amps, dash cams) wired to a constant-hot circuit.
Common Symptoms
- Battery dead the next morning or after the car sits a few days
- Car needs a jump-start frequently despite a relatively new battery
- Power window drops and raises itself a fraction of an inch with the key off / ignition off
- Audible relay clicking or a motor/pump running after the car is shut off and locked
- Key-off parasitic draw measures well above the normal ~25-50 mA (often hundreds of mA to 2-4 A)
- New battery still goes dead and alternator tests fine
- Dome, trunk, or courtesy light staying on with doors closed
How to Fix
Confirm the charging system first: load-test the battery and verify alternator output with a multimeter, including an AC-ripple check to catch a failing diode (a new battery that keeps dying with a "good" charging test points to parasitic draw, not the battery). Then perform a key-off parasitic-draw test: let the car fully sleep (30-60 minutes, doors closed), put a meter in series with the negative battery cable, and confirm the draw. Anything sustained above ~50 mA is suspect; over ~250 mA will flatten the battery overnight. Isolate the offending circuit by pulling fuses/relays one at a time (both the under-hood and trunk-area fuse boxes) and watching for the draw to drop. Common findings and fixes: - Power-window self-cycling: replace the faulty window switch or window/door module and reset window auto-up programming; have the dealer check for any applicable recall/extended-warranty coverage. - Radio/Uconnect not sleeping: confirm by pulling the radio fuse; fix with a head-unit software re-flash/update or replace the head unit if it won't sleep. - TIPM keeping a circuit awake or a stuck relay: swap/replace the suspect relay or, if confirmed, the TIPM. - Stuck door/courtesy/trunk switch or stuck dome light: replace the faulty switch. - Aftermarket accessories: move any constant-draw add-ons to a switched/ignition circuit.
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What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Innova 3320 auto-ranging digital multimeter
Its DC10A input is unfused and the manual limits high-current readings; incorrect series connection can damage the meter or vehicle, so use the exact manual procedure and a current clamp/professional diagnosis when the draw may exceed th…
- NOCO GENIUS5 five-amp charger, maintainer and desulfator
Long-term-storage support after the battery and charging system are known good, or while an infrequently driven vehicle is stored Fitment: Universal 6V/12V lead-acid including AGM and lithium support; it does not locate or repair a paras…
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Sources for this issue (3)
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P023B code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P023B mean?
P023B stands for "Charge Air Cooler Coolant Pump Control Circuit Low." The PCM detected a low-voltage (short-to-ground) condition in the charge air cooler (water-to-air intercooler) coolant pump control circuit.
What are the most common causes of P023B?
The most common causes of P023B are: Short-to-ground in the pump control wiring, Failed coolant pump, Corroded connector, PCM output driver fault. The specific cause varies by vehicle.
How much does it cost to fix P023B?
Repair costs for P023B range from $140 to $1,200, depending on the vehicle and root cause.
Which vehicles are affected by P023B?
Au7o has documented P023B across 1 vehicle models from 1 manufacturers: Dodge.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.