P06B6

Internal Control Module Knock/Combustion Vibration Sensor Processor 1 Performance

Q: Is it safe to drive with P06B6?

Yes, for the short term. With knock detection disabled the computer retards timing to protect the engine, so you'll notice reduced power. Avoid heavy loads and get it looked at.

Q: Can I just clear P06B6?

It will come back if the module's internal processor is genuinely faulty. Try a software update first; clearing alone rarely holds.

Control module (internal) Generic OBD-II High

What it means

P06B6 means the circuitry inside the engine computer that processes knock-sensor signals isn't performing correctly. This is an internal module fault, not the external knock sensor. With knock detection unreliable, the computer usually retards ignition timing as a safeguard, so you may feel reduced power until it's fixed with a software update or module repair.

High

Can I keep driving? Drivable, but the computer may pull ignition timing as a precaution — expect slightly reduced power and economy until it's addressed.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Reduced power and throttle response (timing pulled back for safety)
Slightly worse fuel economy
Possible audible knock or ping under load

Common causes

Most likely first

Internal fault in the module's knock-signal processorLikely
Outdated or corrupted control-module softwareCommon
Poor power or ground to the control module affecting internal processingCommon
Control-module (ECM) failureLess often

How to diagnose & fix

Work through it in order

Scan and confirm the fault is the module's internal processor, not the external knock sensor circuit.
Check the ECM's power feeds and grounds for corrosion or high resistance.
Check for a manufacturer software/calibration update — this often clears internal-processor faults.
Because the fault is inside the module, replacement or reprogramming is the fix when power, grounds, and software are good. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P06B6?+

Yes, for the short term. With knock detection disabled the computer retards timing to protect the engine, so you'll notice reduced power. Avoid heavy loads and get it looked at.

Can I just clear P06B6?+

It will come back if the module's internal processor is genuinely faulty. Try a software update first; clearing alone rarely holds.

Read & clear P06B6 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX