# Service bulletin 1801921

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10220974
- Published by NHTSA: 2022\-09\-26
- Manufacturer's number: 1801921
- Manufacturer's date: 2021\-03\-25
- NHTSA component: ELECTRICAL SYSTEM; POWER TRAIN

## NHTSA's summary

Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with thelatest available software. The customer may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find one or more ofthe following Diagnostic Trouble Codes \(DTCs\). P02EE \- Cylinder 1 Injector Circuit Performance. P02EF \- Cylinder 2 Injector Circuit Performance. P02F0 \- Cylinder 3 Injector Circuit Performance. P02F1 \- Cylinder 4 Injector Circuit Performance.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10220974-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10220974-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Transmission and driveline

## Trouble codes named

P02EE, P02EF, P02F0, P02F1

## Vehicles listed

- 2021 JEEP CHEROKEE

## Recalls for the same vehicles and component

- [2026224](/recalls/tc/2026224.md), 2026-05-07: Powertrain
- [26V290000](/recalls/nhtsa/26V290000.md), 2026-05-07: POWER TRAIN
- [2021263](/recalls/tc/2021263.md), 2021-05-04: Powertrain
- [21V310000](/recalls/nhtsa/21V310000.md), 2021-05-04: POWER TRAIN:AUTOMATIC TRANSMISSION:COOLER/RADIATOR:HOSES AND FITTINGS

## Other bulletins for the same vehicles and component

- [S2523000003 REV.A](/bulletins/11031688.md), 2026-04-29, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM. Door Latch, Handle And Ajar Additional Service Information.
- [08\-075\-26 REV. A](/bulletins/11031423.md), 2026-04-22, Service bulletin: ELECTRICAL SYSTEM. Rear Taillamp Condensation Clearing Procedure On occasion, vehicle exterior taillamp assemblies get fogged with a light layer of condensation on the SYMPTOM: inside of the lenses Fig. 1. This may be reported after the lamps have been turned on and brought up to operating temperature, turned off and then rapidly cooled by cold water \(such as rain, or the water from a vehicle wash\). Lens fogging can also occur under certain atmospheric conditions after a vehicle has been parked outside overnight \(i.e. a warm humid day followed by clear cool night\). This will usually clear as atmospheric conditions change to allow the condensation to change back into a vapor. Turning the taillamps on will usually accelerate this process. This bulletin is to communicate the procedure for rear taillamp condensation clearing.
- [9100778](/bulletins/11030150.md), 2026-03-18, Service bulletin: ELECTRICAL SYSTEM. If replacing $8474412A$ with $8474413A$ version, verify vehicle is proxied and configured properly. The 4412 part does not have RSD \(SXM\) capability. The 4413 part has RSD \(SXM\) capability and will not have an antenna connected. If replacement radio does not function, verify RSD sales code is added to configurator.
- [S1408000384 REV.J](/bulletins/11030035.md), 2026-03-13, Service bulletin: ELECTRICAL SYSTEM. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor \(IBS\) State of Charge \(SOC\) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes \(DTCs\), or Battery Warning Lamp On
- [08\-075\-26](/bulletins/11029670.md), 2026-03-05, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM. Rear Taillamp Condensation Clearing Procedure On occasion, vehicle exterior taillamp assemblies get fogged with a light layer of condensation on the SYMPTOM: inside of the lenses Fig. 1. This may be reported after the lamps have been turned on and brought up to operating temperature, turned off and then rapidly cooled by cold water \(such as rain, or the water from a vehicle wash\). Lens fogging can also occur under certain atmospheric conditions after a vehicle has been parked outside overnight \(i.e. a warm humid day followed by clear cool night\). This will usually clear as atmospheric conditions change to allow the condensation to change back into a vapor. Turning the taillamps on will usually accelerate this process. This bulletin is to communicate the procedure for rear taillamp condensation clearing.
- [S1408000384 REV.I](/bulletins/11028904.md), 2026-02-19, Service bulletin: ELECTRICAL SYSTEM. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor \(IBS\) State of Charge \(SOC\) Inaccurate, Battery Charging Message, Presence of IBS Related Diagnostic Trouble Codes \(DTCs\), or Battery Warning Lamp On
- [109872](/bulletins/11028779.md), 2026-02-12, Service bulletin: ELECTRICAL SYSTEM. POWER TRANSFER UNIT \- NONE
- [109871](/bulletins/11028778.md), 2026-02-12, Service bulletin: ELECTRICAL SYSTEM. POWER TRANSFER UNIT \- NONE
- [S1721000016 REV.B](/bulletins/11026812.md), 2025-12-23, Service bulletin: POWER TRAIN. Service 4wd Light On, AWD System Service Required Message Illuminated. Diagnostic Trouble Code \(DTC\) C14A7\-97 PTU Motor Component Or System Operation Obstructed Or Blocked.
- [9100736](/bulletins/11026652.md), 2025-12-17, Service bulletin: ELECTRICAL SYSTEM. Verify "Z" part number availability. Order a "Z" part number for all Exchange Orders: Warranty, Mopar, Customer pay and Service contract. Order"68" part number for New unsold units only

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