This throttle position sensor replaces Holden OEM part numbers 17123852 and 817206, covering the Holden Monaro CV8 across V2 Series 1, Series 2, Series 3, and VZ — all fitted with the Gen3 LS1 5.7L V8. The Monaro TPS uses a 3-pin round connector with anticlockwise rotation, and this sensor replaces the original without modification.

The Monaro CV8 LS1 is a performance platform built around precise throttle response. The TPS is the sole source of throttle-demand data to the ECU — no mechanical connection exists. A degraded sensor corrupts the voltage sweep the ECU reads, producing hesitation under hard acceleration, surge at cruise, and erratic behaviour under part-throttle conditions where the Monaro is most frequently driven.

TO SUIT

Holden Monaro

[12/01 - 11/02] Monaro V2 Series 1 5.7L V8 Gen3 LS1
[12/02 - 07/03] Monaro V2 Series 2 5.7L V8 Gen3 LS1
[08/03 - 08/04] Monaro V2 Series 3 5.7L V8 Gen3 LS1
[09/04 - 12/05] Monaro VZ 5.7L V8 Gen3 LS1

FITMENT CHECK

This sensor fits Monaro variants with the Gen3 LS1 5.7L V8 only. The Monaro VZ was also produced with the Gen IV LS2 6.0L engine — this sensor does not fit the LS2. Confirm engine displacement before ordering. Replaces OEM numbers 17123852 and 817206.

OEM PART NUMBERS

Holden: 17123852
Holden: 817206

OTHER PART NUMBERS

VEMO: V51-72-0077
SMP: SS10382
TP049
TPS-003
SensorGal: CTPS124

PACKAGE INCLUDES

1 x Throttle Position Sensor

ABOUT THIS SENSOR

3-pin round connector. Anticlockwise rotation. Supplied without cable. 2 mounting bores. OEM-specification resistance sweep for Holden 17123852 — calibrated for the full throttle range of the Gen3 LS1 throttle body as fitted to the Monaro CV8.

COMMON SYMPTOMS OF FAILURE

Flat spot or hesitation under hard acceleration
Surge at steady highway speed
Rough or erratic idle at rest
Poor throttle response at part-open throttle
Automatic transmission shifting incorrectly
Check engine light — fault codes P0120, P0121, P0122, P0123

[12/01 - 11/02] HOLDEN MONARO V2 SERIES 1 5.7L V8 Gen3 LS1
[12/02 - 07/03] HOLDEN MONARO V2 SERIES 2 5.7L V8 Gen3 LS1
[08/03 - 08/04] HOLDEN MONARO V2 SERIES 3 5.7L V8 Gen3 LS1
[09/04 - 12/05] HOLDEN MONARO VZ 5.7L V8 Gen3 LS1

What fault codes does a faulty TPS trigger?

A faulty throttle position sensor typically triggers codes P0120 to P0124. P0120 and P0121 indicate the TPS signal is out of range, P0122 and P0123 indicate the signal is too low or too high, and P0124 indicates an intermittent signal. On drive-by-wire vehicles additional codes related to the electronic throttle control system may also be present.

Can a faulty TPS cause my automatic transmission to shift incorrectly?

Yes. The ECU shares throttle position data with the transmission control module to determine when to upshift and downshift. A faulty TPS sending incorrect throttle angle data can cause erratic shift points, harsh gear changes, the transmission hunting between gears, or the vehicle remaining in a fixed gear. Replacing the TPS often resolves transmission behaviour issues that appear unrelated.

Is it safe to drive with a faulty throttle position sensor?

It depends on how severely the sensor has failed. A partially failed TPS may cause hesitation and poor throttle response but the vehicle remains driveable. A fully failed TPS on a drive-by-wire vehicle can trigger limp mode, restricting the engine to a fixed low throttle position to prevent runaway acceleration. In either case replace the sensor as soon as possible as the fault can worsen without warning.

What are the symptoms of a faulty throttle position sensor?

Symptoms include jerky or hesitant acceleration, rough idle, unexpected surging, poor throttle response, stalling, and fault codes P0120-P0124. Drive-by-wire vehicles may also enter a limp mode limiting engine power.

Can I clean a throttle position sensor instead of replacing it?

TPS sensors are sealed units and cannot be cleaned or adjusted reliably. If the sensor is producing erratic signals or fault codes, replacement is the correct solution. Attempting to clean or adjust it usually results in continued faults.

Do I need to calibrate the throttle position sensor after replacement?

Many vehicles require a TPS calibration or throttle body relearn procedure after replacement. This is usually done with an OBD2 scanner or by following a specific ignition on/off sequence. Check your vehicle's service manual or contact us for guidance.

Identification
SKU	CTPS124-1
Brand	Aftermarket OEM Replacement
Part Numbers
Part Number	CTPS124
Reference OEM Number	17123852
Other OEM Numbers	17123852, 817206
Related Part Numbers	CTPS124, SS10382, TP049, TPS-003, V51-72-0077
Trade Part Numbers	VEMO: V51-72-0077, SMP: SS10382, TP049
Product Specifics
Sensor Type	Throttle position sensor
Number of pins	3-pin connector
Connector Shape	Round
Supplementary Article Info	without cable
Number of mounting bores	2
Rotation Direction	Anticlockwise rotation
Other Details
Note	Always verify fitment using your vehicle's OEM part number.
Unit Of Measure	ea