Saab 9-3 P1644 Engine Error Code

When you check Saab 9-3 car engine light came on code P1644 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However Saab manufacturer may have a different definition for the P1644 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

Do you have fresh, clean fuel in the tank? If it's empty, fill it up and go! If it's full, check P1644 Saab 9-3 that the fuel shut-off valve is open and that it is clean. Stale fuel, dirt and debris are the most common cause of outdoor power equipment not starting properly. If you store equipment with untreated gas in the tank, it can lead to engine damage.

Saab 9-3 P1644 OBD-II Diagnostic Powertrain (P) Trouble Code Description P1644 Fuel Pump Speed Control Circuit Malfunction so you have to check ODB-II Engine Error Code list. Reason For Saab 9-3 P1644 Code The reason of Saab 9-3 P1644 OBD-II Engine Error Code is P1644 Fuel Pump Speed Control Circuit Malfunction.

If your vehicle failed a P1644 Saab 9-3 test and the Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look P1644 Saab 9-3: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.

Saab 9-3 P1644 Possible Solution :

Power Steering Pressure (PSP) Switch Signal Malfunction The PCM counts the number of times vehicle speed transitions from 0 to a calibratable speed. After a calibratable number of speed transitions the PCM expects that the PSP input should have changed. This DTC is set if the transition is not detected. Vehicle towed with engine running Power steering hydraulic concern was repaired but DTC was not erased PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged Check, if possible, if vehicle was towed or power steering service was performed. Observe PSP V PID while checking wires for intermittents.

What does fault code P1644 mean for Saab 9-3 ? What does a diagnostic reading P1644 mean for Saab 9-3 ? How to fix OBD2 Code P1644 for Saab 9-3 ? What do we know about P1644 code for Saab 9-3 ?