P2153

Fuel Injector Group "C" Supply Voltage Circuit Low

Severity: High
Driving: Drive only to a garage

The supply voltage circuit for fuel injector group "C" is reading low - typically a short to earth, an open circuit, or one injector loading the supply. The injectors in that group will not open properly, so those cylinders will misfire or not fire at all.

Possible causes

CommonSupply circuit shorted to earth
CommonOne injector shorted internally
CommonBlown fuse or failing relay
CommonHigh resistance in the supply wiring or a corroded connector
PossibleChafed harness against the engine
PossibleWeak battery or charging fault

What you might notice

Severe misfire on several cylinders
Loss of power
Engine will not start
Check engine light flashing

What to check, in order

Check battery and charging voltage first, then the fuses and relays.
Disconnect the injectors in group "C" one at a time while watching the supply voltage. Recovery identifies the shorted injector.
Measure each injector winding resistance against specification.
Perform a voltage drop test on the supply circuit.
If the check engine light is flashing, stop driving - a severe misfire destroys the catalytic converter quickly.

Read this code from your own car

Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.

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Where this code sits

B · Body C · Chassis P · Powertrain U · Network and communication