P0501 , P0502

Read the instructions below then start the fault diagnostic procedure.

Symptom: SHIFT-UP lamp not working. Fuel shut-off in all gears. Low boost pressure in 3rd, 4th and 5th gears, manual gearbox. ABS warning lamp may be on.

P0501 , P0502

Fault symptoms

SHIFT-UP lamp not working. Fuel shut-off in all gears. Low boost pressure in 3rd, 4th and 5th gears, manual gearbox. ABS warning lamp may be on.

Conditions

•	P0501: ignition ON, vehicle speed >270 km/h

•	P0502: brake pedal not depressed, engine speed >1800 rpm, intake manifold pressure >60 kPa, no speed signal for 4 sec. The conditions above are fulfilled and then no speed signal within 17 minutes

Diagnostic help

The speed signal can be read with the diagnostic tool.

-	Select " Data Display / Output Control (New)".

-	Select " Vehicle Speed (Wire from ABS)".

the diagnostic tool should show the current wheel speed. Drive the car and compare the reading from the diagnostic tool with the speedometer.

Checking the wiring harness. Intermittent faults may occur in connection with short circuits and open circuits. Jiggle the wiring harness at several points and in several directions to locate any problems in the wiring, including intermediate connectors. Observe the multimeter, scan tool or test lamp during the check.