P0615 to P0617, P0512, P0513 and P0633: starter relay, starter request and immobilizer key
The starter relay circuit is open, low or high, the starter request signal has a fault, the key is not one the immobilizer recognizes (P0513), or no key has been programmed into the engine computer (P0633).
SeverityModerateUsually not urgent today, but it can get worse if left.
Can you keep driving?Drive gently, check it soonWhat does P0615 mean?
On many modern cars the engine computer, not the ignition switch, decides when to turn the starter: it waits for the request from the key or button, checks the brake or clutch and the immobilizer, then switches the starter relay. A fault in that chain means the starter may not turn, or may keep turning. The immobilizer codes mean the engine computer did not accept the key, which happens with a damaged key, a weak key battery, a key never programmed to this car or after a module was replaced.
What causes P0615?
- A failed starter relay or a blown fuse
- A damaged wire in the starter request or relay circuit
- A worn key or a weak key fob battery
- A key or a replacement engine computer that was never programmed to this car
- A brake or clutch switch fault blocking the start request
What to check first for P0615
- Try the spare key, and replace the key fob battery
- Check the starter relay and its fuse
- Check that the brake lights work, since a brake switch fault can block the start
- Ask whether the engine computer or the immobilizer was replaced recently
Can you drive with P0615?
If the engine is running, you can drive to a workshop, but avoid switching it off on the way, because it may not start again. If the starter keeps turning after the engine has started, switch off at once and have the car towed.
Since May 2018 an engine warning light that stays on is a major defect at the MOT, so the car fails until the fault is fixed.
Codes on this page
- P0512Starter Request Circuit
- P0513Incorrect Immobilizer Key
- P0633Immobilizer Key Not Programmed - ECM/PCM
- P0615Starter Relay Circuit
- P0616Starter Relay Circuit Low
- P0617Starter Relay Circuit High
Related codes
Checked on · Rafael Soares
These are the generic meanings every manufacturer shares. Each brand adds its own detail, so your car's handbook, its service information and a qualified mechanic have the last word. OdoKeep has no connection with any manufacturer, and the app does not read codes from the car.
