P219A
DTC P219A
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC P219A
- Fuel Trim Cylinder Balance Bank 1
Circuit/System Description
The Fuel Trim Cylinder Balance diagnostic detects a rich or lean cylinder to cylinder air/fuel ratio imbalance. The diagnostic monitors the heated oxygen sensor (HO2S) signal frequency and amplitude characteristics by calculating an accumulated voltage over a predetermined sample period. An imbalance is indicated when multiple samples of the accumulated voltage are consistently higher than the desired value.
Conditions for Running the DTC
* DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0119, P0122, P0123, P0128, P0201 - P0204, P0222, P0223, P0300, P0301 - P0304, P0442, P0443, P0455, P0458, P0461, P0462, P0463, P16F3, P2101, P2135 are not set.
* A scan tool device control is not active.
* The intrusive diagnostics are not active.
* The engine overspeed protection is not active.
* The fuel control is in air-fuel Closed Loop status for greater than 1 s.
* The system voltage is greater than 10.9 V.
* The engine coolant temperature is greater than -20°C (-4°F).
* The engine speed is between 1,350-4,800 RPM.
* The fuel level is greater than 10%.
Conditions for Setting the DTC
Multiple samples of the pre-catalyst HO2S accumulated voltage are consistently greater than the desired value.
Action Taken When the DTC Sets
DTC P219A is a Type A DTC.
Conditions for Clearing the DTC
DTC P219A is a Type A DTC.
Diagnostic Aids
* The air fuel imbalance diagnostic is very sensitive to heated oxygen sensor (HO2S) design. An aftermarket sensor or an incorrect part number may cause a DTC to set.
* Monitoring the misfire current counters, or misfire graph, may help to isolate the cylinder that is causing the condition.
* Certain aftermarket air filters may cause a DTC to set.
* Certain aftermarket air induction systems or modifications to the air induction system may cause a DTC to set.
* Certain aftermarket exhaust system components may cause a DTC to set.
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1
Description and Operation
Hybrid Modes of Operation Description Hybrid Modes of Operation Description
Electrical Information Reference
* Circuit Testing Circuit Testing
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
* Connector Repairs Connector Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Circuit/System Testing
1. Vehicle in Service Mode, observe the scan tool DTC information. Verify there are no other DTCs set.
• If a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
2. Engine running, observe the MAP sensor parameter. The reading should be between 14-110 kPa (2-16 PSI).
• If not within the specified range, refer to DTC P0106 P0106.
3. Vehicle OFF, verify that none of the conditions listed below exists:
* Inspect the air induction system for modified, damaged, leaking, or restricted components.
* Inspect the crankcase ventilation system for improper operation.
* Inspect the vacuum hoses for splits, kinks, and improper connections.
* Inspect for vacuum leaks at the intake manifold, the throttle body, and the fuel injector O-rings.
* Test for a restricted, damaged, leaking, or modified exhaust system from the catalytic converter forward. Refer to Symptoms - Engine Exhaust Symptoms - Engine Exhaust.
* Test the fuel injectors for improper operation. Refer to Fuel Injector Solenoid Coil Test Fuel Injector Solenoid Coil Test.
* Test for fuel contamination. Refer to Alcohol/Contaminants-in-Fuel Diagnosis Testing and Inspection.
* Test for excessive fuel in the crankcase due to leaking injectors.
* Test the ignition system for improper operation. Refer to Electronic Ignition System Diagnosis Electronic Ignition (EI) System Diagnosis.
4. If all the above conditions test normal, test the engine for any mechanical conditions which could alter the flow into the combustion chamber. Refer to Symptoms - Engine Mechanical Symptoms - Engine Mechanical.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.