NHTSA ID Number: 11030692
Manufacturer Communication Number: 2081243/1
TSB/Document Date: 2026-04-04
Summary
Service Info: Engine Control Module (ECM) 5V Reference Circuits. This TPI provides supplementary technical information to support diagnosis of ECM 5V reference circuit DTCs. It details the sensors associated with each reference circuit (A, B, and C) and outlines relevant guidance to assist in isolating faults when any of the following DTCs are stored in the Engine Electronics (diagnostic address: 0001)
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Flying Spur - V8 Variants
Sales types
Type
INTERNAL
MY
Brand Designation Engine code Gearbox code Final drive code
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Documents
Document name
master.xml
INTERNAL
Connection offline
Transaction No.: 2081243/1
Service Info: Engine Control Module (ECM) 5V Reference Circuits
Release date: 13 Mar 2026
Customer statement / workshop findings
This TPI provides supplementary technical information to support diagnosis of ECM 5V reference circuit
DTCs. It details the sensors associated with each reference circuit (A, B, and C) and outlines relevant
guidance to assist in isolating faults when any of the following DTCs are stored in the Engine Electronics
(diagnostic address: 0001)
•
Sensor Reference Voltage “A” Circuit – Open / High / Low (P0641, P0643, P0642)
•
Sensor Reference Voltage “B” Circuit – Open / High / Low (P0651, P0653, P0652)
•
Sensor Reference Voltage “C” Circuit – Open / High / Low (P0697, P0699, P0698)
The information contained within this TPI is intended solely to support improved diagnostic accuracy by
identifying which sensors are linked to each 5V reference circuit.
Technical background
The ECM provides regulated 5V reference and ground to multiple engine sensors using three independent
circuits (A, B, C). A fault occurring anywhere within a circuit may cause the ECM to detect a concern
affecting the entire circuit, rather than isolating the specific sensor involved.
See sensor reference list below including the ECM pin providing 5V (also see wiring diagram in ElsaPro/Iwire for more information).
Circuit A Sensors
•
Oil pressure sender – A22
•
Low pressure fuel pressure sender – A21
•
Charge pressure sender – B1
•
Charge pressure sender 2 – B2
•
Intake manifold pressure sender – B6
•
Intake manifold pressure sender 2 – B7
•
Fuel rail pressure sender – B3
•
Fuel rail pressure sender 2 – B4
Circuit B Sensors
•
Camshaft Hall sender – D1
•
Camshaft Hall sender 2 – D3
•
Camshaft Hall sender 3 – D2
INTERNAL
•
Camshaft Hall sender 4 – D4
•
OPF Bank 2 pressure sensor – F37
•
OPF Bank 2 temperature sensor – F36
•
Accelerator pedal module (Sensor 1) – F32
Circuit C Sensors
•
Engine speed (crankshaft) sender – C1
•
Throttle valve module – C3
•
Throttle valve module 2 – C4
•
Accelerator pedal module (Sensor 2) – F27
•
Charcoal filter pressure sensor – E1
•
Charcoal filter pressure sensor 2 – E2
•
OPF Bank 1 pressure sensor – E4
•
OPF Bank 1 temperature sensor – E8
Production change
Not applicable - This document is provided for diagnostic clarification only
Measure
CAUTION
Disconnect the battery following the Workshop Manual before unplugging ECM connectors. Do not apply
external voltage to any 5V reference supply. Avoid backprobing unless using approved breakout leads.
Handle OPF sensors and throttle modules with care to prevent damage.
Diagnostic Procedure
1. Review all stored DTCs to assist in identifying the sensor associated with the concern.
2. Determine which 5 V reference circuit (A, B, or C) is implicated based on the stored DTC(s).
Perform a visual inspection of the wiring harness for all sensors on the affected circuit.
Check for: chafing, crushing, heat damage, oil contamination, corrosion, and water ingress.
Inspect all connector pins and terminals for signs of damage or poor contact.
3. Carry out repairs as required, which may include:
Replacement of the affected sensor.
INTERNAL
Wiring harness repair in accordance with standard repair procedures.
4. If the concern remains after completing the above checks and repairs, submit a full technical DISS request
with all diagnostic findings and supporting information.
Warranty accounting instructions
As this TPI is Service Information Only, no automatic warranty actions are associated.
In the event that any parts are required to be replaced please refer to the warranty accounting instructions
with Elsa pro this is due to the numerous vehicle specification and symptom scenarios.
INTERNAL
- 6X better wear protection on critical engine parts than...
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- 3X Stronger against viscosity breakdown than leading full...
- Protection for 10,000 miles between oil changes
- Meets or exceeds the following specifications: API SP/SN...
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TSB/Document ID: 2081243/1
Replacement Service Bulletin Number:
MFR Communication Date: 2026-03-18
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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