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HOMESERVICE MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 116 (ENGINE CONTROL SYSTEM & COMPONENT TESTS 6.5L DIESEL)COMPUTERIZED ENGINE CONTROLSDIAGNOSTIC TROUBLE CODES

1998 Chevrolet Suburban K2500, 7.4 J, Part Time

Diagnostic Trouble Codes

1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Diagnostic Trouble Codes

WARNING: This page is about a different car, the 1998 GMC Pickup, 1998 GMC Cab & Chassis, 1998 Chevrolet Pickup, and 1998 Chevrolet Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

TROUBLE CODE DEFINITION

Code

Probable Cause

P0101 ⁽¹⁾

MAF System Performance

P0102 ⁽¹⁾

MAF Sensor Circuit Low Frequency

P0103 ⁽¹⁾

MAF Sensor Circuit High Frequency

P0112 ⁽¹⁾

IAT Sensor Circuit Low Voltage

P0113 ⁽¹⁾

IAT Sensor Circuit High Voltage

P0117 ⁽¹⁾

ECT Sensor Circuit Low Voltage

P0118 ⁽¹⁾

ECT Sensor Circuit High Voltage

P0121 ⁽¹⁾

APP Sensor 1 Circuit Performance

P0122 ⁽¹⁾

APP Sensor 1 Circuit Low Voltage

P0123 ⁽¹⁾

APP Sensor 1 Circuit High Voltage

P0126 ⁽¹⁾

Insufficient ECT For Stable Operation

P0182 ⁽¹⁾

Fuel Temperature Sensor Circuit Low Voltage

P0183 ⁽¹⁾

Fuel Temperature Sensor Circuit High Voltage

P0215 ⁽¹⁾

Engine Shutoff Solenoid Control Circuit

P0216 ⁽¹⁾

Injection Timing Control System

P0218 ⁽²⁾

Transmission Fluid Overtemperature

P0219 ⁽¹⁾

Engine Overspeed Condition

P0220 ⁽¹⁾

APP Sensor 2 Circuit

P0221 ⁽¹⁾

APP Sensor 2 Circuit Performance

P0222 ⁽¹⁾

APP Sensor 2 Circuit Low Voltage

P0223 ⁽¹⁾

APP Sensor 2 Circuit High Voltage

P0225 ⁽¹⁾

APP Sensor 3 Circuit

P0226 ⁽¹⁾

APP Sensor 3 Circuit Performance

P0227 ⁽¹⁾

APP Sensor 3 Circuit Low Voltage

P0228 ⁽¹⁾

APP Sensor 3 Circuit High Voltage

P0231 ⁽¹⁾

Fuel/Lift Pump Feedback Circuit Low Voltage

P0251 ⁽¹⁾

Injection Pump Cam System

P0263 ⁽¹⁾

Cylinder No. 1 Balance System

P0266 ⁽¹⁾

Cylinder No. 2 Balance System

P0269 ⁽¹⁾

Cylinder No. 3 Balance System

P0272 ⁽¹⁾

Cylinder No. 4 Balance System

P0275 ⁽¹⁾

Cylinder No. 5 Balance System

P0278 ⁽¹⁾

Cylinder No. 6 Balance System

P0281 ⁽¹⁾

Cylinder No. 7 Balance System

P0284 ⁽¹⁾

Cylinder No. 8 Balance System

P0300 ⁽¹⁾

Engine Misfire Detected

P0301 ⁽¹⁾

Cylinder No. 1 Misfire Detected

P0302 ⁽¹⁾

Cylinder No. 2 Misfire Detected

P0303 ⁽¹⁾

Cylinder No. 3 Misfire Detected

P0304 ⁽¹⁾

Cylinder No. 4 Misfire Detected

P0305 ⁽¹⁾

Cylinder No. 5 Misfire Detected

P0306 ⁽¹⁾

Cylinder No. 6 Misfire Detected

P0307 ⁽¹⁾

Cylinder No. 7 Misfire Detected

P0308 ⁽¹⁾

Cylinder
No. 8 Misfire Detected

P0335 ⁽¹⁾

CKP Sensor Circuit Performance

P0370 ⁽¹⁾

Timing Reference High Resolution

P0380 ⁽¹⁾

Glow Plug Circuit Performance

P0400 ⁽¹⁾

EGR Flow Malfunction

P0401 ⁽¹⁾

EGR Flow Insufficient

P0402 ⁽¹⁾

EGR Flow Excessive

P0404 ⁽¹⁾

EGR Flow Performance

P0405 ⁽¹⁾

EGR Sensor Circuit Low Voltage

P0406 ⁽¹⁾

EGR Sensor Circuit High Voltage

P0501 ⁽¹⁾

Vehicle Speed Sensor Circuit

P0560 ⁽²⁾

System Voltage Malfunction

P0567 ⁽¹⁾

Cruise Resume Circuit

P0568 ⁽¹⁾

Cruise Set Circuit

P0571 ⁽¹⁾

Cruise Brake Switch Circuit

P0601 ⁽¹⁾

PCM Memory

P0602 ⁽¹⁾

PCM Not Programmed

P0604 ⁽¹⁾

Control Module Random Access Memory

P0606 ⁽¹⁾

PCM Internal Communication Interrupted

P0711 ⁽²⁾

TFT Sensor Circuit - Range/Performance

P0712 ⁽²⁾

TFT Sensor Circuit - Low Input

P0713 ⁽²⁾

TFT Sensor Circuit - High Input

P0716 ⁽²⁾

Input Speed Sensor Circuit Range/Performance

P0717 ⁽²⁾

Input Speed Sensor Circuit - No Signal

P0719 ⁽²⁾

Brake Switch Circuit - Low Input

P0722 ⁽²⁾

Output Speed Sensor - Low Input

P0723 ⁽²⁾

Output Speed Sensor - Intermittent

P0724 ⁽²⁾

Brake Switch Circuit - High Input

P0741 ⁽²⁾

TCC Stuck Off

P0742 ⁽²⁾

TCC Stuck On

P0748 ⁽²⁾

PCS Circuit - Electrical

P0751 ⁽²⁾

1-2 Shift Solenoid - Performance

P0753 ⁽²⁾

1-2 Shift Solenoid - Electrical

P0756 ⁽²⁾

2-3 Shift Solenoid - Performance

P0758 ⁽²⁾

2-3 Shift Solenoid - Electrical

P1125 ⁽¹⁾

APP System

P1191 ⁽¹⁾

Intake Air Duct Leak

P1214 ⁽¹⁾

Injection Pump Timing Offset Error

P1216 ⁽¹⁾

Fuel Solenoid Response Time Too Short

P1217 ⁽¹⁾

Fuel Solenoid Response Time Too Long

P1218 ⁽¹⁾

Injection Pump Calibration Circuit

P1406 ⁽¹⁾

EGR Valve Position

P1409 ⁽¹⁾

EGR Vacuum System Leak

P1626 ⁽¹⁾

VTD Controller Serial Data Circuit

P1621 ⁽¹⁾

EEPROM Write

P1627 ⁽¹⁾

A/D Performance

P1630 ⁽¹⁾

Theft Deterrent PCM In Learn Mode

P1631 ⁽¹⁾

Theft Deterrent Password Incorrect

P1635 ⁽¹⁾

PCM 5-Volt Reference Low

P1641 ⁽¹⁾

MIL Control Circuit

P1643 ⁽¹⁾

WAIT TO START Light Control Circuit

P1653 ⁽¹⁾

EGR Vent Sol. Control Circuit

P1654 ⁽¹⁾

SERVICE THROTTLE SOON Light Control Circuit

P1655 ⁽¹⁾

EGR Solenoid Control Circuit

P1656 ⁽¹⁾

Wastegate Solenoid Control Circuit

P1810 ⁽²⁾

Fluid Press. Manual Valve Position Switch

P1811 ⁽²⁾

Maximum Adapt Long Shift

P1860 ⁽²⁾

TCC PWM Solenoid Circuit - Electrical

P1870 ⁽²⁾

Transmission Component Slipping

P1871 ⁽²⁾

Undefined Gear Ratio

P1875 ⁽²⁾

4WD Low Switch - Input Malfunction ("K" Series)

⁽¹⁾	Code is engine related.

⁽²⁾	Code is transmission related. For transmission related codes, see appropriate automatic transmission diagnosis article, AUTO TRANS DIAGNOSIS - 4L60-E article or AUTO TRANS DIAGNOSIS - 4L80-E - GAS in the AUTO TRANS DIAGNOSIS section for domestic vehicles.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.