Proton Arena gives fault code P0121 on diagnostics

SOURCE: how much to repair fault codes p0116, p0121

You can check the fault code meanings at http://www.bluejag.co.uk/ this should give you an idea of repair costs

Ed Warden

• 218 Answers
• Posted on Sep 14, 2011

SOURCE: i got diagnostic trouble codes P0108,P0121,P0340

Here is what each of your trouble codes means:

DTC P0108 MAP Sensor Range check High
DTC P0121 TPS Circuit Range/Performance Problem
DTC P0340 Camshaft Position Sensor Circuit Malfunction
Do you know how long each of these codes have been stored? Each one of these codes relate to a different part of the vehicle.

Your PO108 codes is probably a faulty Manifold Absolute Pressure Sensor
PO121 is a Throttle Position Sensor malfunction code
PO340 is a Camshaft Position Sensor malfunction code

I would not think that all 3 of these codes all set at the same time, just wouldnt make sense unless there was a problem with the Engine Control Module (ECM) causing all these codes to set at the same time.

Bogdan Odwazny

• 6171 Answers
• Posted on Jan 10, 2016

SOURCE: Proton wiar 1.5 P0121

Problem with TPS sensor (RPM)