Hittade följande översättningar från P0121 till Volvos egna koder i VIDA:
P0121 kan betyda både ECM-903C och ECM-959F.
ECM-903C
Diagnostic trouble code (DTC) information ECM-903C
Condition
This diagnostic trouble code is for informational purposes only. The diagnostic trouble code's only purpose is to inform that the reconfiguration, which may affect the emission system, has been active or is active. The diagnostic trouble code is always stored as the result of another trouble code. Troubleshooting is not required.
Also for upgraded software, released during year 2006 or later, this diagnostic trouble code is used as an information diagnostic trouble code. The diagnostic trouble code will only, however, be stored in case the substitute value, throttle shut, is or has been activated. The diagnostic trouble code is always stored as the result of another trouble code. Troubleshooting is not required. This applies to, for example, diagnostic trouble codes ECM-9150, ECM-9160, ECM-9190, ECM-91A7 or ECM-91B7.
Identifying upgraded software ECM/ETM
Note! For upgraded software, released during 2006 or later. There are certain instances when diagnostic trouble code ECM-903C is stored without another diagnostic trouble code that describes why the substitute value, throttle shut, is active or has been activated. If this is the case, try replacing the throttle unit.
Substitute value
None.
Possible source
Faulty signal:
other diagnostic trouble code (DTC) is stored.
This diagnostic trouble code is generated in combination with other trouble codes. Information on the possible root cause is described.
Information about combined diagnostic trouble codes (DTCs)
Fault symptom[s]
Driving/Poor performance/lacks power
Driving/Poor performance/lacks power/At take off
Driving/Hesitates/surges/Unsure when/at all times
Driving/Hesitates/surges/During acceleration
Driving/Hesitates/surges/During deceleration
Driving/Hesitates/surges/At steady speed
Cruise control/Does not engage
Text window and warning symbol/Red symbol and text message
Idling/Uneven idle
Warning lights and chimes/Electronic Throttle System (ETS) indication/no indication
Warning lights and chimes/Malfunction Indicator Light ("Check engine" light) indication/no indication
ECM-959F
Diagnostic trouble code (DTC) information
Condition
The accelerator pedal position sensor has two different internal sensors, where one generates an analogue signal and the other a pulse-width modulated (PWM) signal. The sensor for the pulse-width modulated signal (PWM) is connected to both Engine control module (ECM) and Electronic throttle module (ETM). The sensor for the analogue signal is only connected to Engine control module (ECM). Then both control modules send out the information on the CAN-net, so that other control modules have possibility to use the information.
Electronic throttle module (ETM) compares the analogue signal that comes directly from the accelerator pedal position sensor with the pulse-width modulated signal coming from the Electronic throttle module (ETM) via the CAN-net. If these two signals differ by more than 10 % for longer time than 0.5 seconds when the engine speed is higher than 600 rpm, which then stores diagnostic trouble code ECM-959F, Faulty signal. At times when the analogue signal is in the process of changing, e.g., during acceleration, a greater deviation between both signals is allowed.
For upgraded software, released during year 2006 or later, the above detection time is increased from 0.5 to 0.9 seconds.
Identifying upgraded software ECM/ETM
For more information about the electronic throttle system and related components such as the electronic throttle module, accelerator pedal position sensor, brake light switch, clutch pedal position sensor, and brake pedal position sensor: Design Function
Substitute value
Closing of throttle during braking.
The accelerator pedal position is ignored when the brake pedal is depressed.
Cruise control off.
Cruise control off during entire operating cycle in which fault was detected. If the fault is no longer present, the function is available the next time the car is started.
For upgraded software, released in 2006 or later, adjustments have been made to substitute values. In driving cycles when the fault is active, then slow opening of the throttle will occur and the throttle will close at braking.
Identifying upgraded software ECM/ETM
Possible source
loose connections or contact resistance in the terminals on the digital pulse width modulated signal cable
interference on the CAN signal wiring
fault in the pulse width modulated signal cable between the engine control module (ECM) and the throttle unit
defective throttle unit.
This diagnostic trouble code is generated in combination with other trouble codes. Information on the possible root cause is described.
For turbo engines and 6-cylinder aspirated engines: Information about combined diagnostic trouble codes (DTCs)
Fault symptom[s]
Poor response from accelerator
Cruise control does not operate
Var med om på farsans S80 2.5D att en säkring gick när AC-kompressorn skar. Förutom att mata styrningen till kompressorn även matade även säkringen delar av gaspedalen. Resultatet var att en av signalerna ut från gaspedalen inte skickades och gasresponsen blev jättedålig. Efter byte av säkringen så funkade det fint igen i det fallet.