Jeep bulletin 0801324
What it saysFlash: Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. NHTSA’s full summary ↓
Jeep filed this with NHTSA as a service bulletin dated Jan 10, 2024, received Mar 18, 2024, about the power train. It names 1 model year (2023). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationFlash: Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set in the Hybrid Control Processor (HCP) module: ? P16F0-00 - SPI Comm Hardware Fault. Customers may also comment on one or more of the following: ? Shifts rough occasionally when coming down to a stop. ? Shifts rough occasionally when accelerating. ? Shifts rough when transitioning from EV to Hybrid operation on low SoC. ? Shifts rough when engines starts. ? On part throttle accelerations with little to no battery available the transition from battery power to engine on is harsh and abrupt. ? The engine oil life on dashboard drops down too fast when the engine oil dilution reaches high level without the ability to recover. This bulletin involves reprogramming the Powertrain Control Module (PCM), Transmission Control Module (TCM) and the AHCP also known as Power Inverter Module (PIM), with the latest available software.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 0801324 | Service bulletin | Jan 10, 2024 | 10251834 | not found |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 1 model year this bulletin names have filed 578 complaints with NHTSA since 2015. 248 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
On the 2023 Jeep Grand Cherokee, the 31 owners who gave an odometer reading for Electrical System reported it at a median of 18,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
Generally, for the entire time we've owned the car, it has ongoing and systemic electronics malfunctions. This ranges from the car slamming on its own brakes while driving to systems not working to the seat shifting on its own while driving to false positives in the NAV system, etc.
2023 Jeep Grand Cherokee · Electrical System · filed with NHTSA Jul 9, 2025
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the power train
Source: same model, same component group76 other manufacturer communications filed against the Jeep Grand Cherokee under the same component group (power train), newest first. The eight newest are listed; the rest are on the Jeep list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 08-289-26 | Service bulletin | Jul 30, 2026 | Transmission Control Module (TCM) Diagnostic Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must S… |
| 21-053-26 | Service bulletin | Jul 3, 2026 | Service Transmission Message Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit… |
| 21-041-26 | Service bulletin | Jun 18, 2026 | Transmission Auxiliary Oil Pump Failure Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPT… |
| 21-049-26 | Service bulletin | Jun 4, 2026 | Flash: Transmission Control Module (TCM) Updates Customers may experience one or more of the following: ● Intermittently during low‑speed pa… |
| 18-058-26 | Service bulletin | Jun 4, 2026 | Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mus… |
| 18-050-26 | Service bulletin | Apr 18, 2026 | Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mus… |
| 18-049-26 | Service bulletin | Apr 18, 2026 | Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mus… |
| S2623000023 | Service bulletin | Apr 8, 2026 | Power Liftgate Inoperative. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Jeep, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Jeep 0801324 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the 0801324 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does 0801324 cover?
The manufacturer filed it against 1 model year: 2023 Jeep Grand Cherokee. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.