1231 Battery Voltage/DME Main Relay Either the battery was disconnected or the voltage of the
battery is too low or too high. Check the battery and charging
system.
1232 Throttle Idle Switch
1233 Throttle WOT Switch
1234 Vehicle Speed Sensor (Speedometer
A Signal)
This code is stored when no plausible speed signal is detected
while driving. The requirements are an engine speed >2500
rpm and under load for more than 10 seconds. Check the
speedometer function and the wire to the DME . Also check
for codes in the Combi Unit (Instrument Cluster).
1237 A/C Compressor cut off This code is stored if there is a short to B+ or Ground. In the
case of a short to ground, the A/C compressor is not switched
off at a speed below 5 mph (8 km/h) when accelerating under
full load. The A/C compressor does not operate when shorted
to B+. Check the A/C compressor cut-out relay and its wiring.
1241 Air Mass Sensor (See note 1)
1242 A/C Compressor Check A/C compressor signal wire to the DME control unit for
a short-circuit to power, ground or for disconnection. Check
refrigerant level and condition of A/C pulley drive belt.
1243 Crankshaft Pulse Sensor This code is stored when signal from the Crankshaft Pulse
Generator is implausible (absent or out of range). Check the
Crankshaft Pulse Generator and the wiring.
1244 Camshaft Sensor This code is stored when the Camshaft Pulse Generator signal
is interrupted or defective. Also check the spark plugs and the
ignition coil(s) output. Check the pulse signal with an
oscilloscope (50Hz, 25ms sweep). Measure with a break-out
box. If a coil is found to be defective the DME control unit may
also be damaged. Failure of the injector side of the output
stage is the most common symptom.
1245 Intervention EGS This code is stored when a short to ground occurs on the wire
from the EGS to the DME control unit, for more than 2.5
seconds. The on-board computer should display the message
TRANSMISSION EMERGENCY PROGRAM. Ignition timing
will be retarded only once and then the DME will substitute the
original value until this code is cleared. Check the wire and
connection to the EGS.
1247 Ignition Secondary Monitor
1251 Fuel Injector 1 (or group 1) Check the injector valve for coking and proper spray pattern.
Check the wiring from the DME and the output stage of the
DME. Code 1283 may also be stored when the defect is
intermittent.
1252 Fuel Injector 2 (or group 2) Check the injector valve for coking and proper spray pattern.
Check the wiring from the DME and the output stage of the
DME. Code 1283 may also be stored when the defect is
intermittent.
1253 Fuel Injector 3 Check the injector valve for coking and proper spray pattern.
Check the wiring from the DME and the output stage of the
DME. Code 1283 may also be stored when the defect is
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