Bosch ME 7.2 Engine Management System (page 5 of 8)

ENGINE MANAGEMENT SYSTEM – V8

18-2-36 DESCRIPTION AND OPERATION

0704

A/C compressor clutch switch

Input circuit malfunction

1000

DMTL pump motor drive

Intermittent or short circuit to ground or battery

1102

Throttle position to mass air flow plausibility not 
active

Air mass too small

1103

Throttle position to mass air flow plausibility not 
active

Air mass too large

1117

Thermostat monitoring sensor

Short circuit to ground

1118

Thermostat monitoring sensor

Open circuit or short circuit to battery

1120

APP sensor

Implausible signals

1121

APP sensor 1

Range/ Performance problem

1122

APP sensor 1

Short circuit to ground

1123

APP sensor 1

Short circuit to battery

1129

HO2S

Swapped sensors (LH to RH)

1161

RH bank lambda control

Adaption per ignition too small

1162

RH bank lambda control

Adaption per ignition too large

1163

LH bank lambda control

Adaption per ignition too small

1164

LH bank lambda control

Adaption per ignition too large

1170

RH bank front HO2S signal

Fuel trim malfunction

1171

RH bank lambda control

Adaption over time too large

1172

RH bank lambda control

Adaption over time too small

1173

LH bank front HO2S signal

Fuel trim malfunction

1174

LH bank lambda control

Adaption over time too large

1175

LH bank lambda control

Adaption over time too small

1221

APP sensor 2

Range/ Performance problem

1222

APP sensor 2

Short circuit to ground

1223

APP sensor 2

Short circuit to battery

1300

Misfire detection

Catalyst damaging misfire

1301

Misfire detection

Multiple cylinder misfire

1327

RH bank knock sensor 2

Short circuit to ground

1328

RH bank knock sensor 2

Short circuit to battery

1332

LH bank knock sensor 4

Short circuit to ground

1333

LH bank knock sensor 4

Short circuit to battery

1413

SAI air injection pump relay

Short circuit to ground

1414

SAI air injection pump relay

Short circuit to battery

1450

DMTL pump motor

Reference current above limit

1451

DMTL pump motor

Reference current below limit

1452

DMTL pump motor

Reference current unstable

1453

DMTL pump motor

Changeover valve stuck

1454

DMTL changeover valve drive

Short circuit to battery

1455

DMTL changeover valve drive

Short circuit to ground

1456

DMTL changeover valve drive

Open circuit

1481

DMTL heater output drive

Signal intermittent

1482

DMTL heater output drive

Open circuit or short circuit to ground

1483

DMTL heater output drive

Short circuit to battery

1488

DMTL pump motor drive

Open circuit

1489

DMTL pump motor drive

Short circuit to ground

1490

DMTL pump motor drive

Short circuit to battery

1522

Plausibility MSR intervention

No activity

1523

RH bank VCC solenoid valve

Short circuit to ground

1524

RH bank VCC solenoid valve

Short circuit to battery

1525

RH bank VCC solenoid valve

Open circuit

1526

LH bank VCC solenoid valve

Open circuit

1527

LH bank VCC solenoid valve

Short circuit to ground

P Code No.

Component/Signal

Fault Description