Bosch ME 7.2 Engine Management System (page 2 of 8)

ENGINE MANAGEMENT SYSTEM – V8

DESCRIPTION AND OPERATION 18-2-33

0021

LH bank CMP sensor

Timing over-advanced or system performance

0022

LH bank CMP sensor

Timing over-retarded

0030

RH bank front HO2S heater circuit

Circuit intermittent

0031

RH bank front HO2S heater circuit

Short circuit to ground

0032

RH bank front HO2S heater circuit

Short circuit to battery

0036

RH bank rear HO2S heater circuit

Circuit intermittent

0037

RH bank rear HO2S heater circuit

Short circuit to ground

0038

RH bank rear HO2S heater circuit

Short circuit to battery

0050

LH bank front HO2S heater circuit

Circuit intermittent

0051

LH bank front HO2S heater circuit

Short circuit to ground

0052

LH bank front HO2S heater circuit

Short circuit to battery

0056

LH bank rear HO2S heater circuit

Circuit intermittent

0057

LH bank rear HO2S heater circuit

Short circuit to ground

0058

LH bank rear HO2S heater circuit

Short circuit to battery

0102

MAF sensor signal

Short circuit to ground

0103

MAF sensor signal

Short circuit to battery

0106

ECM internal ambient pressure sensor

Performance problem

0107

ECM internal ambient pressure

Short circuit to ground

0108

ECM internal ambient pressure

Open circuit or short circuit to battery

0112

IAT sensor

Short circuit to ground

0113

IAT sensor

Open circuit or short circuit to battery

0114

Ambient temperature input

Fault data received

0116

ECT sensor

Signal implausible

0117

ECT sensor

Short circuit to ground

0118

ECT sensor

Open circuit or short circuit to battery

0120

APP sensor switch A

Implausible

0121

APP sensor switch A

Range/ Performance problem

0122

APP sensor switch A

Open circuit or short circuit to ground

0123

APP sensor switch A

Short circuit to battery

0125

ECT sensor

Insufficient coolant temperature for closed loop 
control

0128

Thermostat monitoring sensor

Low coolant temperature – thermostat stuck 
open

0130

RH bank front HO2S signal

Circuit malfunction

0131

RH bank front HO2S signal

Short circuit to ground

0132

RH bank front HO2S signal

Short circuit to battery

0133

RH bank front HO2S signal

Slow response

0134

RH bank front HO2S signal

No activity

0135

RH bank front HO2S heater circuit

Circuit malfunction

0136

RH bank rear HO2S signal

Circuit malfunction

0137

RH bank rear HO2S signal

Short circuit to ground

0138

RH bank rear HO2S signal

Short circuit to battery

0139

RH bank rear HO2S signal

Slow response

0140

RH bank rear HO2S signal

No activity

0141

RH bank rear HO2S heater circuit

Circuit malfunction

0150

LH bank front HO2S signal

Circuit malfunction

0151

LH bank front HO2S signal

Short circuit to ground

0152

LH bank front HO2S signal

Short circuit to battery

0153

LH bank front HO2S signal

Slow response

0154

LH bank front HO2S signal

No activity

0155

LH bank front HO2S heater circuit

Circuit malfunction

0156

LH bank rear HO2S signal

Circuit malfunction

0157

LH bank rear HO2S signal

Short circuit to ground

P Code No.

Component/Signal

Fault Description