477 / 5157
Nexon Gasoline – EMS ECU Bosch
DTC Troubleshooting Manual
Version: 0.1
Date: 26-08-2017
Prepared By: Sunu S Babu/Yogesh Jadhav
Checked By: Yeshwant Jadhav
Approved By: Satish Kumar
Document Part No: 2921 02 224 A1736
Page: 473 of 1203
Copyright ©
TATA MOTORS Ltd.
This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author.
P0303-92: Cylinder 3 Misfire Detected - Performance or Incorrect Operation
Overview:
ISO Code
P0303-92
Customer Symptom
Poor Drivability.Alternate Cylinder cut Off & Vehicle stall
Fault Effects (On Vehicle)
1. Poor drivability.
2. Misfire / Backfire.
3. Exhaust heat up.
4. Threat to damage catalytic converter & ignition system.
Lamp Status (If Any)
MIL ON after 3 drive cycle
Fault Detection Condition
This fault gets logged if Cylinder 3 Spark plug / Ignition Coil misfire is detected.
Normal Operating Condition
Proper firing by spark plugs / Ignition Coils and proper fuel injection by Injector
cylinder 3.
Probable Trouble Area
Injectors/ Ignition Coil B faulty wiring Harness connections, Clogged Injectors,
Faulty Spark Plugs / Ignition Coil B, HT cables, low compressor pressure,
improper valve clearance, improper valve timing, Faulty ECT Sensor.
Healing Condition
Engine Running and 3 drive cycles
Fault permanent deletion
1. Clear DTC Command form Scan tool
2. Stack Over Flow.
3. 40 warm up cycles.
4. ECU Flashing.
5. ECU Power-Fail
Component Details:
NA
Preliminary Checks:
1. Faulty Wiring Harness connections of Injector cylinder 3 / Ignition Coil B
2. Clogged Injector cylinder 3
3. Faulty Ignition Coil B /HT Cables / Spark Plugs
4. Low Compression Pressure
5. Improper valve clearance
6. Improper Valve timing
7. Faulty ECT Sensor