VOLVO
EFI-0014 - Throttle position (TP) sensor. Faulty signal
System
Electronic Fuel Injection (EFI)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
2 modelsS40 (1996–2004), V40 (1996–2004)
Show models by year and engine (2)
What does this fault code mean?
The control module receives a faulty signal from the throttle position sensor, which shows the throttle position. The fault may be a defective sensor, a faulty signal from the idle air control valve, or contact resistance, an open circuit or a short-circuit in the wiring.
Possible causes
- Defective throttle position (TP) sensor
- Throttle position sensor signal wire short-circuited to ground or supply voltage
- Open circuit in the signal wire
- The idle air control (IAC) valve gives a faulty ON signal
- Idle air control valve signal wire short-circuited to ground or supply voltage
- Contact resistance
What you can do
- 1Check the connectors to the throttle position sensor and the control module for contact resistance and oxidation, and remedy them.
- 2Switch the ignition off before disconnecting the connectors. Then look for loose connectors and chafed wiring.
- 3If you have a diagnostic tool, follow the throttle position sensor voltage in live data while the accelerator is pressed and released.
- 4If no fault is found in the wiring, the throttle position sensor needs replacing. Have a workshop do the replacement.
Symptoms you may notice2
- The malfunction indicator lamp lights up
- Poor performance
What the fault can affect2
- The engine runs on a rich fuel and air mixture
- Idle control is not damped
General guidance for car owners. Diagnosis on the car can point to a different cause.