GM Service Manual Online
For 1990-2009 cars only

Circuit Description

DTC B1656 indicates that the odometer portion of the instrument cluster EEPROM, which stores the vehicle mileage, has an unrecoverable error. The odometer is no longer accurate.

Conditions for Setting the DTC

DTC B1656 sets when the instrument cluster detects an EEPROM error during a diagnostic system test.

Action Taken When the DTC Sets

When DTC B1656 is set current, the instrument cluster displays the word ERROR in the season odometer display.

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Custer Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

Replace the Instrument Custer.

Did you complete the replacement?

--

System OK

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