Diagnostic Trouble Code (DTC) Readout, Diagnostic Module
| Diagnostic Trouble Code (DTC) |
Possible Cause |
Remedy/Test Step 1) |
| 1 |
No malfunction in systems monitored |
- |
| 2 |
Heated oxygen sensor inoperative |
Test LH-SFI, section 3.1. |
| 3 |
Lambda control inoperative |
Test LH-SFI, section 3.1. |
| 4 |
Air injection inoperative |
Test LH-SFI, section 3.1. |
| 5 |
Exhaust gas recirculation inoperative |
Test LH-SFI, section 3.1. |
| 6 |
Idle speed control inoperative |
Test electronic accelerator, section 6.2. |
| 7 |
Ignition system defective |
Test distributor ignition system, section 5.2. |
| 8 |
Engine coolant temperature sensor, open/short circuit |
Test LH-SFI, section 3.1. |
| 9 |
Intake air temperature sensor, open/short circuit |
Test LH-SFI, section 3.1. |
| 10 |
Voltage at mass air flow sensor too high/low |
Test LH-SFI, section 3.1. |
| 11 |
TN-signal (rpm) at LH-SFI control module (N3/1) defective |
Test LH-SFI, section 3.1. |
| 12 |
Heated oxygen sensor heater, open/short circuit |
Test LH-SFI, section 3.1. |
| 13 |
Camshaft position sensor signal of ignition control module defective. |
Test LH-SFI, section 3.1. |
| 14 |
Intake manifold pressure at start (in ignition control module - N1/3) too low/high |
Vacuum supply to N1/3,
test distributor ignition system, section 5.2. |
| 15 |
Wide open throttle information defective |
Test electronic accelerator, section 6.2. |
| 16 |
Closed throttle position information defective |
Test electronic accelerator, section 6.2. |
| 17 |
Data exchange malfunction between individual control modules |
 23  7.0. |
| 18 |
Adjustable camshaft timing solenoid, open/short circuit |
Test LH-SFI, section 3.1. |
| 19 |
Fuel injectors open/short circuit or
self-adaptation in LH-SFI control module (N3/1) at limit |
Test LH-SFI and reset LH-SFI control module adaptation to mean value, section 3.1. |
| 20 |
Speed signal not present |
Test electronic accelerator, section 6.2. |
| 21 |
Purge switchover valve, open/short circuit |
Test LH-SFI, section 3.1. |
| 22 |
Camshaft position sensor signal defective |
Test distributor ignition system, section 5.2. |
| 23 |
Intake manifold pressure (in ignition control module - N1/3) with engine running too low/high |
Vacuum supply to N1/3,
test distributor ignition system, section 5.2. |
| 24 |
Starter ring gear segments and/or crankshaft position sensor defective |
Test distributor ignition system, section 5.2. |
| 25 |
Knock sensors or ignition control module defective |
Test distributor ignition system, section 5.2. |
| 26 |
Upshift delay 1  2 (model 124.034 only), 2 3 (all models) |
Test LH-SFI, section 3.1. |
| 27 |
Engine coolant temperature sensor deviation between
sensor circuit 1 and sensor circuit 2 |
Test LH-SFI, section 3.1. |
| 28 |
Engine coolant temperature sensor (coolant temperature change monitor) |
Test LH-SFI, section 3.1. |
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