MechanicDB
Fault Family System: Powertrain (P-Codes) 25 SAE Codes

Starter Control Circuit

Diagnostic & Technical Explanation
Code P0512 (Starter Request Circuit) sets when the ECM/BCM detects an open circuit, out-of-range voltage, or a performance fault while requesting, energizing, or inhibiting the starter relay or solenoid. Causes are a failed starter relay, a worn starter solenoid contact, corroded connectors at the relay socket, or chafed control wiring between the module and the relay/solenoid.

These 25 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 25 times.

Codes in this family (25)

CodeDefinitionRepair coverage
P0512Starter Request Circuit4 ranked fixes
P0615Starter Relay A Circuit4 ranked fixes
P0616Starter Relay A Circuit Low4 ranked fixes
P0617Starter Relay A Circuit High4 ranked fixes
P06E9Engine Starter Performance4 ranked fixes
P0817Starter Disable Circuit/Open4 ranked fixes
P081AStarter Disable Circuit Low4 ranked fixes
P081BStarter Disable Circuit High4 ranked fixes
P26E4Starter Relay B Circuit4 ranked fixes
P26E5Starter Relay B Circuit Low4 ranked fixes
P26E6Starter Relay B Circuit High4 ranked fixes
P26F0Starter Relay A Stuck On4 ranked fixes
P26F1Starter Relay A Stuck Off4 ranked fixes
P26F2Starter Relay B Stuck On4 ranked fixes
P26F3Starter Relay B Stuck Off4 ranked fixes
P2AF2Starter Relay C Control Circuit/Open4 ranked fixes
P2AF3Starter Relay C Control Circuit Low4 ranked fixes
P2AF4Starter Relay C Control Circuit High4 ranked fixes
P2AF5Starter Relay C Stuck On4 ranked fixes
P2AF6Starter Relay C Stuck Off4 ranked fixes
P2AF7Starter Relay D Control Circuit/Open4 ranked fixes
P2AF8Starter Relay D Control Circuit Low4 ranked fixes
P2AF9Starter Relay D Control Circuit High4 ranked fixes
P2AFAStarter Relay D Stuck On4 ranked fixes
P2AFBStarter Relay D Stuck Off4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here: