OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Powertrain generic / SAE

P26E6

Starter Relay B Circuit High

Voltage on the secondary starter relay control line is above the expected window. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number6 / E6

Possible causes

  • Control wire shorted to B+ high
  • Open relay coil medium
  • Connector pins corroded - high contact resistance low

Inspection / repair

  • Difficulty: easy
  • DIY: possible
  • Estimated cost: 50–300 €
  • Estimated time: 0.3–1.5 h
  • Component: starter relay b
  • Component: wiring harness
  • MIL / check engine light

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication