# Service bulletin 18NA089

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: 10137422
- Published by NHTSA: 2018\-05\-21
- Manufacturer's number: 18NA089
- Manufacturer's date: 2018\-03\-22
- NHTSA component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\)

## NHTSA's summary

This informational bulletin provides information for higher mileage Volts that are having the EGR cooler being plugged not allowing sufficient flow with DTC being set.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10137422-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10137422-0001.pdf)

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

## Components

Engine, Exhaust and emissions, EGR valve

## Vehicles listed

- 2016 to 2018 CHEVROLET VOLT

## Other bulletins for the same vehicles and component

- [15\-NA\-080](/bulletins/10201116.md), 2021-09-07, Service bulletin: ENGINE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\). Malfunction Indicator Lamp \(MIL\) On, Possible P0300, P040B, P041B, P01427 and/or P1429 TDCs Set
- [15\-NA\-080](/bulletins/10190514.md), 2021-04-20, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\); EQUIPMENT. Malfunction Indicator Lamp \(MIL\) On, Possible P0300, P040B, P041B, P1427 and/or P1429 DTCs Set Some customers may comment on a check engine light illuminated. During diagnosis a technician may find one or more of the following DTCs set: • P0300 — Engine Misfire Detected • P040B — Exhaust Gas Recirculation Temperature Sensor 2 Circuit Range/Performance • P041B — Exhaust Gas Recirculation Temperature Sensor 1 Circuit Range/Performance • P1427 — EGR Temperature Sensor 1 – Intake Air Temperature 1 Not Plausible • P1429 — EGR Temperature Sensor 2 – Intake Air Temperature 1 Not Plausible This may be caused by a calibration within the K20 Engine Control Module

JSON: [/v1/bulletins/10137422](/v1/bulletins/10137422)

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