new 2001 v70 - ecm8606 question

[paintinx]

Hello from germany,

i yesterday bought my 2001 V70 2.4 T Volvo and have read the obd codes using my MOT PRO EU908.
And I am wondering about the "syntax" of the code ...
years ago I got a Chevy Suburban from 2000, all these codes were like "P0300" ...

one of the "Volvos code" is: ECM 8606 TurboCharger control system flow ... too low ...
ECM is clear, engine control module ... but i dont understand the number ... "8606".

The text message is also clear ... i will check the whole turbo system ... air flow, hoses, vacuum system.

any other suggestions or links ... to solve the problem and maybe to explain the difference between obd codes and volvo codes?

thx in advance, stephan

[RickHaleParker]

Volvo Diagnostic trouble code (DTC) format: Control Module-DTC number.
The three character alpha prefix is the control module, in this case ECM (Engine Control Module).
The suffix is the Diagnostic trouble code (DTC).

A conversion table not worth much for this code because Volvo ECM-6806 = P1237. P1XXX are manufacture defined codes. P1237 can mean something entirely different with another manufacturer.

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ECM-6806 Turbocharger (TC) control system flow fault. Flow too high/low.

Diagnostic trouble code (DTC) information

Condition
If engine speed (RPM) is above 3500 rpm and the engine is operating at a high load, the control signal to the turbocharger (TC) control valve is at maximum and the boost pressure (from boost pressure sensor) is lower than a designated value (approximately 20 kPa (2.90 psi) under normal boost pressure - signal too low).
If the air mass (from mass air flow (MAF) sensor) is higher than a desired value (signal too high) it is interpreted as a fault and diagnostic trouble code (DTC) ECM-6806 is stored.

Substitute value
reduced boost pressure

Possible source

Signal too high:

• air leakage after turbocharger (TC)

Signal too low:

• hoses between turbocharger (TC) and turbocharger (TC) control valve respectively turbocharger (TC) control valve and pressure servo are loose or are blocked/damaged
  faulty turbocharger (TC) control valve
  faulty boost pressure control (BPC) valve pressure servo
  sticking boost pressure control (BPC) valve

Fault symptom(s)
DL2, Warning lights and chimes/Malfunction Indicator Light ("Check engine" light) indication/no indication
Driving/Poor performance/lacks power
Driving/Hesitates/surges/Unsure when/at all times

[paintinx]

... answer. thx a lot. stephan