# Service bulletin 18\-070\-24

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: 11007849
- Published by NHTSA: 2024\-09\-17
- Manufacturer's number: 18\-070\-24
- Manufacturer's date: 2024\-09\-14
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: Powertrain Control Module

## NHTSA's summary

"Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician must find one or more of the following Diagnostic Trouble Codes \(DTC\)s have been set: ● P0629 \- Fuel Pump Control Circuit High. ● P0171 \- Fuel system Lean. ● P0087 \- Fuel Rail Pressure Too Low \- Bank 1. Customers may also experience the following: ● Vehicle will not start. ● The Instrument Cluster Panel \(ICP\) unable to calculate the instantaneous fuel economy under heavy acceleration. ● The oxygen sensor can give incorrect values when entering EV mode. False fault detection \(MIL on\) is possible when this event occurs. ● The rear half shafts are damaged due to accelerating in drive with the Electronic Parking Brake \(EPB\) applied. This bulletin involves updating the PCM with the latest available software."

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11007849-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11007849-9999.pdf)

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

## Trouble codes named

P0087, P0171, P0629

## Vehicles listed

- 2023 JEEP GRAND CHEROKEE

JSON: [/v1/bulletins/11007849](/v1/bulletins/11007849)

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