OBD-II code · Powertrain (generic, extended)
P26E4 Starter Relay B Circuit
The control circuit for the secondary starter relay (used on twin-starter heavy diesels or stop-start systems with a dedicated stop-start starter) returns no usable signal.
Is it safe to drive with P26E4?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen coil in the relay
- PossibleBroken control wire
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Starter Relay B, Wiring Harness
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.