B0970 code meaning
Interior Light Circuit
What B0970 means
B0970 is not documented anywhere public, whether in J2012 extracts, workshop literature or NHTSA bulletins. The title covers the interior lighting circuit. The 2003–2012 Saab 9-3 supervises it through its BCM: B2556 02 when more than 10 A flows on the lamp feed, B2555 0F when the lamps are powered although they should be off, and B2610 02 when the dimmed PWM line drops below 2.0 V. GM's 2011 Saab 9-5 reports a grounded courtesy lamp feed as B2615 02, stops driving the lamps and clears the history entry after 100 fault-free ignition cycles. HELLA warns that fitting bulbs of higher wattage overheats lamps and surrounding trim. A constantly lit interior lamp can drain the battery overnight.
B0970 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0970
- Interior lights stay off when a door is opened
- Interior lights stay on permanently
- Battery flat after the car has stood overnight
Common causes of B0970
- Most likelyDoor contact switch stuck, keeping the lamps on
- PossibleShort in a roof or footwell lamp, often after bulb changes
- PossibleChafed wire in the headliner or A-pillar
- Less likelyLamp output of the body control module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Interior lampBody control module
What each part of B0970 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 70 | The exact fault in that area. |
What to do next
- Note B0970 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B0970
What does B0970 mean?
B0970 means "Interior Light Circuit". B0970 is not documented anywhere public, whether in J2012 extracts, workshop literature or NHTSA bulletins. It is a generic code, so it means the same on every make.
Is it safe to drive with B0970?
B0970 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0970 fail an emissions test?
B0970 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B0970 to fix?
Difficulty: easy. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will B0970 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.