# Service bulletin 1804921

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: 10223496
- Published by NHTSA: 2022\-10\-17
- Manufacturer's number: 1804921
- Manufacturer's date: 2021\-05\-20
- NHTSA component: SERVICE BRAKES, HYDRAULIC; ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE; EXTERIOR LIGHTING; ELECTRICAL SYSTEM; BACK OVER PREVENTION

## NHTSA's summary

Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation, a technician may find one or more of the following DTCs have been set: P225D\-00 \- Nox Sensor 1/1 Performance \- Signal Stuck Low. P249C\-00 \- Excessive Time To Enter Closed Loop Reductant Injection Control. P065A \- Generator System Performance. P00F4\-00 \- Humidity Sensor Circuit Low. P00AF\-00 \-Turbocharger Boost Control Module "A" Performance. P0106\-00 \- Manifold Absolute Pressure Sensor Performance. P20FB\-00 \- Reductant Pump 2 Control Performance. P200A\-00 \- Intake Manifold Runner Performance \- Bank 1. P200B\-00 \- Intake Manifold Runner Performance \- Bank 2. P2610 \- PCM Internal Engine Off Timer Performance. P0087\-00 \- Fuel Rail Pressure Too Low \(with rapid apply and release of accelerator pedal\). P015E\-00 \- Excessive Time To Enter Closed Loop Fuel Timing Control. P01CB\-00 \- Cylinder 1 Injection Timing Performance \- Over Retarded. P01CC\-00 \- Cylinder 1 Injection Timing Performance \- Over Advanced. P01CD\-00 \- Cylinder 2 Injection Timing Performance \- Over Retarded. P01CE\-00 \- Cylinder 2 Injection Timing Performance \- Over Advanced. P01CF\-00 \- Cylinder 3 Injection Timing Performance \- Over Retarded. P01D0\-00 \- Cylinder 3 Injection Timing Performance \- Over Advanced. P01DL\-00 \- Cylinder 4 Injection Timing Performance \- Over Retarded. P01D2\-00 \- Cylinder 4 Injection Timing Performance \- Over Advanced. P01D3\-00 \- Cylinder 5 Injection Timing Performance \- Over Retarded. P01D4\-00 \- Cylinder 5 Injection Timing Performance \- Over Advanced. P01D5\-00 \- Cylinder 6 Injection Timing Performance \- Over Retarded. P01D6\-00 \- Cylinder 6 Injection Timing Performance \- Over Advanced. P0534\-00 \- A/C Refrigerant System "A" Charge Loss. P204F\-00 \- Reductant System Performance. P2199\-00 \- Intake Air Temperature Sensor 1/2 Correlation.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10223496-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10223496-9999.pdf)

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

## Components

Brakes, Driver assistance, Electrical system, Fuel system, Lighting, Backup camera, Software

## Trouble codes named

P0087, P00AF, P00F4, P0106, P015E, P01CB, P01CC, P01CD, P01CE, P01CF, P01D0, P01D2, P01D3, P01D4, P01D5, P01D6, P0534, P065A, P200A, P200B, P204F, P20FB, P2199, P225D, P249C, P2610

## Vehicles listed

- 2020 JEEP WRANGLER

## Recalls for the same vehicles and component

- [24V676000](/recalls/nhtsa/24V676000.md), 2024-09-12: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA; EXTERIOR LIGHTING:BRAKE LIGHTS
- [22V638000](/recalls/nhtsa/22V638000.md), 2022-08-25: BACK OVER PREVENTION:DISPLAY FUNCTION
- [20V191000](/recalls/nhtsa/20V191000.md), 2020-09-10: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

## Other bulletins for the same vehicles and component

- [0300224](/bulletins/10251863.md), 2024-03-18, Service bulletin: EXTERIOR LIGHTING; BACK OVER PREVENTION. Front and Rear Axle Sensor Kit \*\*Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Code \(DTC\) has been set: ? C1451\-11 \- Service Axle Locker System\*\* Customers may also comment on a Service Axle Locker message displayed in the Electronic Vehicle Information Center \(EVIC\) for this condition.
- [ReferenceY40](/bulletins/10251816.md), 2024-03-18, Service bulletin: ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:SOFTWARE. Customer Satisfaction Notification Y40 Control Module Software Updates
- [S2319000007](/bulletins/10248550.md), 2024-01-08, Service bulletin: BACK OVER PREVENTION; STEERING:CRITICAL FASTENERS; STEERING. Squeak Noise From Dash Area When Turning The Steering Wheel.
- [0804523](/bulletins/10248014.md), 2024-01-02, Service bulletin: BACK OVER PREVENTION:SOFTWARE. Radio Over The Air Updating to 34.42 Software Version ? Mobile Wi\-Fi inoperative upon start up. ? Hotspot gives 9No Internet9 connection message on phone when trying to connect to a device. This bulletin provides information regarding the latest Firmware Over The Air \(FOTA\) update and provides the service technician an overview of the steps a customer will need to take to complete the update. The radio software will be updated from 34.4 to 34.42.
- [S2025000001](/bulletins/10247967.md), 2024-01-02, Service bulletin: EXTERIOR LIGHTING; BACK OVER PREVENTION. Malfunction Indicator Lamp Illumination \(MIL\). Diagnostic Trouble Code \(DTC\) P203E ? Reductant Level Sensor 1 Circuit Intermittent\-Erratic Set.
- [9003357](/bulletins/10247905.md), 2024-01-02, Service bulletin: BACK OVER PREVENTION. ADAPTER, Engine Oil Filter \(Pentastar V6\) For all 2014MY replace the Oil Filter Adapter \(OFA\). For any other MY \(with mileage above 30,000\) review and follow instructions from STAR Online S1809000007 REV. C available on Dealer Connect. Also, consider the following: 1\) Remove OFA 2\) Replace only the oil inlet O\-ring and gaskets \(seals kit in SOL above\). 3\) Re\-install the OFA. For 2023MY and beyond use black O\-ring. For 2022MY and prior use red O\-ring. Note: When replacing OFA, it may be necessary to transfer the Oil Temp/Pressure Sensor from the old OFA to the new OFA.
- [9100134](/bulletins/10247903.md), 2024-01-02, Service bulletin: SERVICE BRAKES; FUEL SYSTEM, GASOLINE; BACK OVER PREVENTION. Engine When replacing a GMET4 long block from a 2021 JL or older, you will need to carry over the injector wiring harness from the original engine, and the Fuel pressure sensor should be replaced with part number: 68212572AB.
- [9100247](/bulletins/10247404.md), 2023-12-18, Service bulletin: BACK OVER PREVENTION; VEHICLE SPEED CONTROL. ERG Hydraulic Tensioner Before replacing any FEAD components, please check FEAD belt layout as per the engine sales code. Customer complaint may include a noise from under the hood described as a squeal, screech, squeak, chirp or belt\-related noise and/or noisy tensioner/pulley. Please refer to SOL\# S2309000007.
- [S1808000152](/bulletins/10243131.md), 2023-10-02, Service bulletin: VEHICLE SPEED CONTROL:ACCELERATOR PEDAL; BACK OVER PREVENTION. CEL \(Check Engine Lamp\) Illuminated, P057B Brake Pedal Position Sensor Performance
- [BulletinA](/bulletins/10240002.md), 2023-07-31, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Customer Satisfaction Notification ZD7 \- Radio Software Update

JSON: [/v1/bulletins/10223496](/v1/bulletins/10223496)

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