Exhaust gas temperature sensor internal failure shorting the signal to ground; Chafed or melted sensor harness rubbing against the exhaust or engine block; Corroded or water-filled connector at the sensor or at the engine control module; Damaged signal wire pinched under a component or routed incorrectly after prior repair; Faulty engine control module driver circuit, though this is uncommon; Aftermarket sensor with incorrect internal resistance or wiring pinout

DTC codes / Volkswagen codes / P1454

P1454 · VolkswagenExhaust Gas Temperature Sensor 1 Short To Ground

Q: What does code P1454 mean?

Exhaust Gas Temperature Sensor 1 Short To Ground. P1454 on a Volkswagen means the engine control module has detected a short to ground on the signal circuit of exhaust gas temperature sensor 1, which is the first sensor in the exhaust stream. The computer monitors the sensor's voltage and flags this code when the signal wire reads near zero volts for longer than expected, indicating the circuit is grounded somewhere between the sensor and the module.

P1454 on a Volkswagen means the engine control module has detected a short to ground on the signal circuit of exhaust gas temperature sensor 1, which is the first sensor in the exhaust stream. The computer monitors the sensor's voltage and flags this code when the signal wire reads near zero volts for longer than expected, indicating the circuit is grounded somewhere between the sensor and the module.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

Symptoms you may notice

Illuminated check engine light, often with no other noticeable symptoms
Reduced engine power or limp mode if the module substitutes a default exhaust temperature value
Slightly higher fuel consumption as the module may enrich the mixture for protection
In rare cases, a rough idle or hesitation if the fault affects regeneration logic on a diesel particulate filter
No driver-perceptible change in performance on many gasoline models

Common causes, most likely first

Exhaust gas temperature sensor internal failure shorting the signal to ground
Chafed or melted sensor harness rubbing against the exhaust or engine block
Corroded or water-filled connector at the sensor or at the engine control module
Damaged signal wire pinched under a component or routed incorrectly after prior repair
Faulty engine control module driver circuit, though this is uncommon
Aftermarket sensor with incorrect internal resistance or wiring pinout

How to diagnose and fix it

Scan all modules and record freeze-frame data for P1454 to confirm the fault is active and not stored from a past event
Visually inspect the sensor harness from the sensor connector to the first loom clip for chafing, melting, or pinched sections
Disconnect the sensor and measure resistance from the signal pin to ground on the sensor side to check for an internal short
With the sensor disconnected and the key on, measure voltage on the signal wire at the module side to see if the short is in the harness or the module
Perform a wiggle test on the harness while watching live exhaust temperature data to catch an intermittent short
Repair or replace the damaged section of harness, then clear the code and verify the sensor reads a plausible temperature after a cold start
If the harness and sensor test good, substitute a known-good sensor and recheck before condemning the engine control module

What a shorted EGT sensor really tells you

A short to ground on the signal wire often comes from the harness touching the exhaust manifold after a clutch or turbo job, not from the sensor itself.
On many Volkswagen diesel engines, a failed exhaust gas temperature sensor can disable diesel particulate filter regeneration without setting a separate regeneration code.
The sensor connector is a common water trap on models with underbody shields missing, so check for green corrosion before replacing any parts.
A shorted sensor can pull the 5-volt reference shared with other sensors, causing unrelated codes that disappear once the EGT circuit is repaired.
Do not assume the sensor is bad because the code says sensor; a resistance check at the connector separates a sensor short from a harness short in minutes.

Can I keep driving with P1454?

You can usually drive the vehicle short distances to a repair shop, but avoid heavy acceleration, towing, or long highway trips because the module may run a protection strategy that affects fuel mixture and emissions. If the engine enters limp mode or you smell raw fuel, stop driving and have the vehicle towed.

Tools that help

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Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.