8124 690 01 Rev. K KohlerEngines.com
EFI SYSTEM-BOSCH
Long Pause
Short Pauses
Code 32
3
2
Code 61
1
6
Long Pause
Light remains on at end of transmission
1. Diagnostic display initiated through ignition key sequencing.
2.
Example of Diagnostic Display
Long Pause
3.
4.
5.
6.
7.
After the problem has been corrected, fault codes may be cleared as follows.
1. Disconnect negative (-) battery cable from battery terminal, or remove main fuse for ECU for approximately 1
minute.
2. Reconnect cable and tighten securely, or reinstall main fuse. Start engine and allow it to run for several minutes.
MIL should remain off if problem was corrected, and fault codes should not reappear (codes 31, 32, 33, and 34
may require 10-15 minutes of running to reappear).
Following chart lists fault codes, what they correspond to, and what visual indications will be. Following chart is a
list of individual codes with an explanation of what triggers them, what symptoms might be expected, and probable
causes.
Blink
Code
OBD2
P-Code Ap-
plicable to:
"32 Pin" (MSE
1.1) ECU/Sys-
tem Only
Connection or Failure Description
"35 Pin"
(MA 1.7)
Metal-
Cased
ECU/
System
"24 Pin"
(MSE 1.0)
Plastic-
Cased
ECU/Sys-
tem
"32 Pin"
(MSE
1.1)
Plastic-
Cased
ECU/
System
Note
- - No RPM Signal Y Y Y
21 P0335 Loss of Synchronization Y Y Y
22 P0120 TPS-Signal Implausible N N N 2
22 P0122 TPS-Open or Short Circuit to Ground Y Y Y
22 P0123 TPS - Short Circuit to Battery Y Y Y
23 P0601 Defective ECU Y Y Y
24 Engine Speed Sensor Y Y Y 9
31 P0174 System too Lean Y Y Y 6
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