# Service bulletin 18\-078\-26

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: 11037571
- Published by NHTSA: 2026\-09\-30
- Manufacturer's number: 18\-078\-26
- Manufacturer's date: 2026\-09\-26
- NHTSA component: ENGINE

## NHTSA's summary

Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P05CC\-00 \- Cold Start A Camshaft Position Timing Performance Bank 1. ● P05CE\-00 \- Cold Start B Camshaft Position Timing Performance Bank 1. This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037571-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037571-9999.pdf)

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

## Components

Engine

## Trouble codes named

P05CC, P05CE

## Vehicles listed

- 2027 RAM 1500

## Other bulletins for the same vehicles and component

- [9100898](/bulletins/11037347.md), 2026-09-17, Service bulletin: ENGINE. Engine PNs: MY 24\-26 WD/DT \(5.7L\) Code P00B is being misdiagnosed and incorrect parts are being installed causing over repair. Refer to SOL S2609000006 The IAFM Foam Engine Valley Cover \(PN 53013735AB\) does not provide sufficient clearance for proper routing of the MDS solenoid jumper harness \(PN 05148163AE\). As a result, the harness may become compressed by the foam cover. To prevent unnecessary part replacement, the MDS solenoid jumper harness \(PN 05148163AE\) should be inspected for damage or pinch conditions prior to replacing the following part numbers: Engine PNs: 68409343AA 68409357AA 68450915AA OCV PNs: 53022338AB Phaser PNs: 53022298AA 53022298AB
- [9100839](/bulletins/11033961.md), 2026-06-18, Service bulletin: ENGINE. 3\-way valves are available in STAR Parts as two distinct components and must be selected correctly based on application. The High Temp 3\-way valve \(68309834AC\) is located between the engine and the bulkhead at the rear of the engine compartment. The Low Temp 3\-way valve \(68448241AA\) is located between the engine and the radiator at the front of the engine. When ordering or servicing, ensure the correct valve is identified and installed in the proper location, as incorrect part selection may lead to improper thermal system operation and repeat repairs.

JSON: [/v1/bulletins/11037571](/v1/bulletins/11037571)

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