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P2606 Intake air heater: reading or operation not right ("B")

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P2606 means: Intake air heater: reading or operation not right ("B"). Glow plugs heat the diesel engine's cylinders for cold starts. Drive gently and have the car checked soon. The most common repair costs about €90–180 in Estonia, depending on make and model. The most common cause: burnt-out glow plug.

Is it safe to drive?Get it checked soonDrive gently and have the car checked soon.
Glow plug replacement€90–180parts and labour in Estonia, depending on make and model

What it means

Glow plugs heat the diesel engine's cylinders for cold starts. The computer found a fault in a plug or the glow plug module circuit. There is a signal, but the reading or operation isn't plausible. The cause may be the part itself or a real mechanical fault.

What you may notice

  • Hard cold starts
  • White smoke after starting
  • Glow plug light flashing

What could be wrong

  1. 1Burnt-out glow plug · Glow plug replacement €90–180
  2. 2Glow plug module or relay · Control unit check and software €150–300
  3. 3Wire or connector at the plug · Wiring or connector repair €45–90
  4. 4Fuse · Fuse replacement and cause check €30–60

Repair difficulty: Moderate

What you can check yourself

In cold weather start the engine only once the glow plug light has gone out. Fix it before the frosts if you can. You can check the simple things yourself, but the repair is best done in a workshop.

How we fix it

  1. We measure each plug's resistance
  2. We check the module and wiring
  3. We replace the plug or module

Standard SAE description: Intake Air Heater "B" Circuit Range/Performance

Related symptoms: Smoke from the exhaust

Check the fuse · If a light, the horn, wipers, a socket or the fuel pump is dead, a blown fuse may be the cause.Fuse boxes by car →

Want a definite answer?

Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong. Repair price depends on the work involved, generally €45 per hour.

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Questions

What does fault code P2606 mean?

Intake air heater: reading or operation not right ("B"). Glow plugs heat the diesel engine's cylinders for cold starts. The computer found a fault in a plug or the glow plug module circuit. There is a signal, but the reading or operation isn't plausible. The cause may be the part itself or a real mechanical fault.

Can I drive with code P2606?

Drive gently and have the car checked soon.

How much does it cost to fix P2606?

It depends on the cause: glow plug replacement €90–180; control unit check and software €150–300; wiring or connector repair €45–90. Prices include labour at €45/h, depending on make and model.

How is P2606 fixed?

We measure each plug's resistance. We check the module and wiring. We replace the plug or module.

Related codes

P2607Intake air heater: signal or voltage too low ("B")P2605Intake air heater: open circuit ("B")P0504Brake pedal switch: readings don't match ("A")P0512Starter and cranking: circuit faultP0514Battery temperature sensor: reading or operation not rightB1318Battery voltage too low (body module)P2604Intake air heater: reading or operation not right ("A")

Based on AI combined with our hands-on workshop experience and knowledge. This information is general and prices are approximate (Estonian workshop rates). The same code can mean different things on different cars. Only an inspection of the car gives a definite answer.

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